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【Objective】The present paper aimed to explore the effects of different mulching measures on fungal community structure, ecological function and species interaction in rhizosphere soil of Allium chinense, in order to provide theoretical basis and data support for the use and selection of mulching film for production.【Method】At the harvest period of A. chinense, rhizosphere soil covered with ordinary transparent film, blue film and no film treatment was collected, and the fungal community in the rhizosphere soil under each treatment was studied using high-throughput sequencing technology, FUNGuild database, molecular ecological network and other analytical methods.【Result】The mulching treatment reduced the diversity of fungal communities, but under the blue mulching treatment, beneficial fungal communities such as Humicola, Talaromyces and Aspergillus with higher relative abundance were enriched; From the molecular ecological network of fungi, it could be seen that although plastic film coverage simplified the network, the resistance of fungal communities to the external environment had been improved, with blue plastic film exhibiting more stability than ordinary plastic film; In addition, after functional prediction of the fungal communities in each treatment, it was found that the relative abundance of saprophytic functional microbial communities was higher under blue plastic film, promoting the decomposition of organic matter and nutrient cycling.【Conclusion】The fungal community structure, ecological functions, and species relationships in the rhizosphere soil of A. chinense show significant differences under different film covering treatments. Among them, the fungal community under blue film covering treatment is more conducive to the growth and development of A. chinense, but at the same time, the potential risks caused by the increase of pathogenic functional bacterial communities caused by film covering measures should also be considered. [ABSTRACT FROM AUTHOR]

Objective】The paper aims to establish a model predicting the growth, development stages, and harvesting period of soilless-cultivated greenhouse roses, thereby providing theoretical support for the regulation of environmental factors in the cut rose production process.【Method】In the study, three distinct cut rose varieties with significant differences in growth cycles, namely ‘Loshen’‘Huanlesong’ and ‘Fenhongxueshan’, were selected for soilless cultivation in plastic greenhouse tunnels in Malong district, Qujing city. Data on growth and development were collected over five periods, accompanied by concurrent records of light radiation and temperature during 2021-2022. By analyzing the growth cycle characteristics of cut roses, the study established a predictive model based on the physiological product of thermal effectiveness and PAR（PTEP） to describe the growth and development stages of cut roses. Subsequently, the constructed growth model was validated using independent data.【Result】Cut roses required physiological thermal accumulations of 22.08, 29.41 and 38.89 MJ/m² during the pruning to bud, bud to flowering, and flowering to harvest stages, respectively. The predictive model for the growth and development stages of cut roses, constructed in the study, was based on PTEP. At various growth and development stages of cut roses, the simulated predicted values of the model exhibit good consistency with the measured values. The 1∶1 linear regression standard errors（RMSE） between model-predicted values and measured values were 0.7, 6.5 and 9.4 days, demonstrating the accuracy of the model predictions.【Conclusion】Considering the combined effects of light radiation and temperature, the model developed in the study can predict the timing of various growth and development stages of cut roses, as well as the harvest period for cut flower products. With this model, growers can make precise adjustments to light and temperature in the greenhouse, effectively regulating the growth cycle of cut rose products. The study not only provides a scientific foundation for the production of cut rose products in greenhouse soilless cultivation but also offers valuable technical support for growers in formulating practical production plans. [ABSTRACT FROM AUTHOR]

【Objective】 The current paper was conducted to study the relationships between different altitudes and the economic traits of walnut fruit, the degree of variation of main fatty acids, and the degree of variation of main fatty acids in Yunnan’s main walnut variety, Juglans sigillata cv. Yanbipao, so as to reveal the variation characteristics of its fruit shape and nutritional components, determine the best suitable cultivation area for a specific variety and to provide a theoretical basis for further developing applications.【Method】 Taking Yangbipao walnut as the test material, from the altitude of 1500 meters, the fruit was sampled every time the altitude rising by 100 meters, and the economic traits and fatty acid quality indicators of the fruit were measured and analyzed. The economic forest research method was used to determine the economic properties of nuts, main fatty acid content. Correlation analysis, stepwise regression analysis and determination degree analysis were carried out to reveal the relationship between each index and altitude change. 【Result】 At an altitude of 1500 meters, the thickest shell was 1.105 mm; At an altitude of 1700 meters, the smallest seed weight, kernel weight, and three-diameter mean were 9.298 g, 4.961 g, and 32.240 mm respectively; At an altitude of 1900 meters, the lowest rate of kernel release was 50.6%; At an altitude of 2300 meters, the highest values were found for seed weight, kernel weight, kernel release rate, and three-diameter mean, while the thinnest shell was 1.015 mm. The altitude had a negative correlation with shell thickness, a significant positive correlation with kernel release rate, longitudinal diameter, and transverse diameter, a positive correlation with seed weight, kernel weight, horizontal diameter, and three-diameter mean, and a positive correlation with oleic acid, peanut acid, and peanut oleic acid, as well as a negative correlation with stearic acid, linoleic acid, and linolenic acid. The altitude had the greatest direct effect on peanut oleic acid, and the indirect effect on linoleic acid was greater than the direct effect. The altitude mainly affected the variation in the properties of linoleic acid, peanut acid, and peanut oleic acid. 【Conclusion】 In the study area, altitude has a comprehensive impact on the economic traits and main fatty acid content of Yangbipao walnut kernel fruits, within the range of 1500-2300 meters, these traits perform well. Through comprehensive analysis, the walnut quality is the best at an altitude of 1700-2100 meters. [ABSTRACT FROM AUTHOR]

【Objective】To provide a reference for finding eco-friendly antibacterial agents, the diversity of endophytic fungi in the medicinal plant Thespesia populnea in mangroves and their antifungal and antibacterial activities were studied. 【Method】Endophytic fungi were isolated and purified from the stem, leaf and bark tissues of the medicinal plant T. populnea in Guangxi Beibu Gulf mangroves, and identified by a combination of morphology and molecular biology. Colletotrichum from Diospyros kaki, Juglans regia, Litchi chinensis, and Fusarium oxysporum f. sp. cubense 1（FOC1), Fusarium oxysporum f. sp. cubense 4（FOC4), and Alternaria cucumerina from Cucumis sativus, as well as endophytic fungus Alternaria alternata from Avicennia marina, and Streptococcus iniae from Oreochromis niloticus, were selected as indicator organisms. The antifungal and antibacterial activities of endophytic fungal extracts were screened by plate confrontation method and filter paper method. 【Result】A total of 60 strains of endophytic fungi were isolated and purified from T. populnea, belonging to 5 genera and 25 species. Among them, the genera Colletotrichum and Diaporthe were dominant, with the isolation rates of 48. 33% and 26. 67%, respectively. The rest were Botryosphaeria, Didymella and Cryptosporella, with isolation rates of 15. 00%, 6. 70% and 3. 33% respectively. The most strains were isolated from the bark tissue of T. populnea, with a total of 4 genera and 23 strains, accounting for 38. 33% of the total isolation amount, followed by leaf tissue（31. 67%) and stem tissue（30. 00%). In addition, 12 endophytic fungi were found to have ITS rDNA sequence similarity of less than 95. 00% with NCBI database, indicating that they might be potential new species. The results of antifungal and antibacterial activities indicated that J1-20 had strong antifungal and antibacterial activities against the 8 selected indicator organisms. The antifungal rates against Colletotrichum of D. kaki, Colletotrichum of J. regia, Colletotrichum of L. chinensis, FOC1 and FOC4, A. cucumerina from C. sativus, A. alternata from A. marina, were 39. 39%, 25. 00%, 19. 10%, 32. 43%, 28. 20%, 89. 00% and 74. 19%, respectively. Meanwhile, the inhibitory zone of J1-20 against S. iniae was 21. 00 mm. 【Conclusion】The endophytic fungi in T. populnea have rich diversity and relatively uniform distribution. Among them, J1-20 has broad-spectrum antifungal and antibacterial activities against 8 indicator organisms and has good development potentials. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to examine the effects of enhanced UV-B radiation, nitrogen addition and their interaction on the interspecific competition between invasive weed Alternanthera philoxeroides and its native accompanying species Digitaria sanguinalis, providing reference for the control of invasive plants under the global change.【Method】According to the de Wit substitution test method, we totally set two experimental factors that contained the treatment method（nitrogen addition, UV-B radiation, nitrogen × UV-B） and the species（A. philoxeroides, D. sanguinalis） on the mono and mixed potting cultures, measured the total biomass, morphology, pigment, and photosynthetic fluorescence of these two studied plant species, and then used the two-way ANOVA and the least significant difference（LSD） multiple comparisons to examine the differences of above indicators with different treatment combinations.【Result】（i） In the monoculture, nitrogen addition led to a significant increase in the maximum stem length of plants and leaf area of D. sanguinalis by 207.154% and 297.643%, and a significant decrease in the total biomass and qp＿Lss of A. philoxeroides by 40.612% and 52.381%, respectively. UV-B radiation led to a significant increase in the maximum stem length of plants, QY＿max and QY＿Lss of A. philoxeroides by 117.607%, 404.459% and 835.714%, respectively, and a significant decrease in the QY＿Lss of D. sanguinalis by 45.605%. The interaction effect led to a significant decrease in the total biomass of A. philoxeroides and QY＿max of D. sanguinalis by 79.310% and 18.984%, and a significant increase in the QY＿max of A. philoxeroides by 685.350%, respectively. The interaction effect also led to an opposite trade-off of F0 and QY＿Lss between these two studied plant species.（ii） In the mixed culture, nitrogen addition led to a significant increase in the leaf area and Chla of D. sanguinalis by 254.259% and 53.018%, respectively, and a significant decrease in the root length and Chla of A. philoxeroides by 76.051% and 12.084%, respectively. UV-B radiation led to a significant increase in the Chla of A. philoxeroides by 45.434%. The interaction effect led to a significant decrease in the root length of A. philoxeroides by 58.824%. 【Conclusion】Nitrogen addition relatively increased the competitive advantage of D. sanguinalis in terms of biomass and morphology, but UV-B radiation weakened its photosynthetic activity and increased the chlorophyll content of A. philoxeroides. Furthermore, UV-B radiation and its interaction with nitrogen addition significantly increased the actual photochemical efficiency of A. philoxeroides. Thus, we should strengthen the monitoring of A. philoxeroides invasion under global change, to prevent the interaction of multiple factors aggravating the competitive substitution of native plants by this invader. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to explore the pathogen fungi of stem rot of Xanthium strumarium and investigate the inhibitory effects of seven fungicides in carbendazim, imazalil, procymidon, thiabendazole, topsin-methyl, fludioxonil and prochloraz on it in vivo.【Method】The pathogenic fungi were isolated from the stem base of X. strumarium by hyphal tip cutting method, and the pathogen of stem rot on X. strumarium was confirmed by Koch’s rule verification. To identify the pathogen species, morphological characteristics of the pathogenic colonies, mycelium and sclerotium were noted, internal transcribed spacer（ITS) and translation elongation factor 1-α（TEF1-α) sequences were amplified by molecular biological PCR, cloned and sequenced to further analyze and identify the pathogen species.【Result】The six pathogens were isolated, and their morphological characteristics were consistent with Athellia rolfsii. About 1 week after the mycelium and sclerotium of the pathogen were respectively inoculated on the base of healthy X. strumarium stems, the symptoms of the most experimental group were the same as those of diseased plants in the field. The sequence of NCXS-1 clone was 100% consistent with the corresponding sequences of A. rolfsii strains in the database. Among the seven screened pesticide fungicides, NCXS-1 was not sensitive to carbendazim, imazalil, procymidone, thiabendazole and topsin-methyl, and both fludioxonil and prochloraz had certain inhibitory effect on the colony growth of A. rolfsii, where fludioxonil had the strongest inhibitory effect with EC50 as 0.12 mg/L.【Conclusion】The pathogen causing stem rot of X. strumarium was identified as A. rolfsii, and fludioxonil was the most effective fungicide for inhibiting the growth of stem rot of X. strumarium in 7 kinds of pesticides. The results can provide useful guidance for the effective control of X. strumarium stem rot. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to study the occurrence form of cadmium (Cd) accumulation in soil aggregates of Cd-contaminated brown calcareous soil matrices of paddy fields in the Karst area of northwestern Guangxi, and to provide data reference for safe rice production in this type of Cd-contaminated paddy fields in the region. 【Method】The sampled soil aggregates were separated into five aggregates as ＞ 2.000 mm, 1.000-2.000 mm, 0.050-1.000 mm, 0.074-0.250 mm and ＜0.074 mm, the composition of soil aggregates particle size, Cd content of different particle size aggregates and their main occurrence patterns from 0-20, 20-30, 30-50 and 50-80 cm depth profiles in the Karst area of northwest Guangxi were studied.【Result】The proportion of 0.250-1.000 mm size aggregates in each profile was stable, above 30.00%, with no significant difference between profiles (P＞0.05), the proportion of ＞2.000 mm size aggregates in the 0-20 cm soil profile (tillage layer) was the largest (40.20%), and as the depth of the profile increased, the proportion of ＞2.000 mm size aggregates decreased rapidly, and the proportion of ＜0.250 mm size aggregates showed a gradual increasing trend. Analysis of the Cd content of agglomerates of different particle sizes showed that, in 0-20, 20-30 and 30-50 cm soil profiles, Cd was mainly enriched in ＞2.000 mm particle size aggregates, with contents as high as 2.22, 1.66 and 0.95 mg/kg, respectively, and in the 50-80 cm soil profile, Cd was mainly enriched in 1.000-2.000 mm particle size aggregates. ＞2.000 mm particle size aggregates contributed most to the whole soil Cd content in the 0-30 cm soil layer. The occurrence form of Cd in the aggregates at different profile depths showed obvious differences, the proportion of Cd in aggregates of all particle sizes in the 0-20 cm profile was mainly in the organic matter binding state, with the smallest proportion of Cd in the exchangeable state (except for ＜0.074 mm particle size aggregates), and the proportion of Cd in the exchangeable state in the aggregates increased greatly with the increase of the depth of the profile, when the profile depth was increased to under 30 cm, the Cd in the aggregates mainly existed in carbonate bound state, and with minimal content in the residue lattice state.【Conclusion】In the typical Cd-contaminated brown calcareous soil matrices of paddy fields in the Karst area of northwestern Guangxi, the Cd is mainly enriched in aggregates of ＞2.000 mm and 1.000-2.000 mm particle size, the Cd in the aggregates of each particle size in the 0-20 cm tillage soil is mainly in the form of organic matter bound state, and with the smallest proportion in the form of exchangeable state. With the increase of the profile depth, the proportion of exchangeable Cd increases greatly, while the proportion of Cd in the stable form decreases significantly. Therefore, in the actual production process, it should focus on improving the content of large particle size soil aggregates and avoiding excessive intensive ploughing and deep tilling, reducing the exchangeable state Cd content in the ploughed soil, and ultimately reducing the risk of excessive Cd in rice during rice production. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to study the histological characteristics of the ovaries, the changes in concentration of vitellogenin and nutrient metabolism level of Procambarus clarkii under the stress of sunning field, explore the relevant mechanism of nutrient changes during ovarian maturation process of P. clarkii, and the results provided a reference for the improvement and standardization of the production operation of P. clarkii ovary maturity which was promoted by environmental stress in sunning field.【Method】The experimental subjects were divided into sunning field group P. clarkii and control group P. clarkii. The female P. clarkii were collected at 0, 3, 7 and 10 days of the sunning field stress respectively. At each sampling time point, the ovaries were taken for paraffin section and HE staining. The ovaries, hepatopancreas and serum of samples were collected, of which the expression and concentration of vitellogenin mRNA and the level of nutrient metabolism were detected. 【Result】Under the sunning field stress, four ovarian development stages were identified, including the pre-vitellogenesis stage (stage Ⅰ, ovary was yellow, oocyte diameter 150-250 μm), primary vitellogenesis stage (stage Ⅱ, ovary was orange, oocyte diameter 250-600 μm), secondary vitellogenesis stage (stage Ⅲ, ovary was brown, oocyte diameter greater than 600 μm), mature stage (stage Ⅳ, ovary was dark brown, oocyte diameter greater than 1000 μm). At 0 days of the stress, the ovarian maturation rate of female P. clarkii in the sunning field group was similar to that in the control group. At 10 days of experiment, the ovarian maturation rate of the female P. clarkii in the sunning field group rose to 96.67%, while the control group rose to 60.00%. With stress time increasing, the relative expression of vitellogenin mRNA in the ovaries and hepatopancreas of the control group and the sunning field group increased, of which vitellogenin mRNA in the hepatopancreas was greater than that in the ovaries. Over the time of experiment, the total expression level of vitellogenin mRNA of the hepatopancreas in the sunning field group and the control group was greater than that in the ovary, and the contribution rate of the hepatopancreas was greater than that of the ovary. The concentration of vitellogenin in the ovary, hepatopancreas, and serum in the sunning field group and the control group increased over time. The concentration increase of vitellogenin in the sunning field group was significantly higher than that in the control group. There was extremely significant positive correlation between hepatopancreas vitellogenin concentration and ovary vitellogenin concentration, between hepatopancreas vitellogenin concentration and serum vitellogenin concentration, between ovary vitellogenin concentration and serum vitellogenin concentration (P＜0.01). With stress time increased, hemocyanin (Hem), total protein (TP), lactic acid (LA) and glucose (Glu) content in female P. clarkii of both groups all showed a decreasing trend, the decrease range of sunning field group was greater than control group; And contents of triglyceride (TG) and cholesterol (TC) showed an increasing trend, and the increasing range of sunning field group was greater than that of control group.【Conclusion】Four developmental stages in ovaries of P. clarkii were identified during environmental stress of sunning field. As stress time passed by, the relative expression and concentration of vitellogenin mRNA in different tissues of P. clarkii increased, of which contribution rate in hepatopancreas was greater than that in ovary. The contents of Hem, TP, LA, and Glu decrease, and the contents of TG and TC increase in P. clarkii, indicating that environmental stress of sunning field has a positive effect on ovarian development. [ABSTRACT FROM AUTHOR]

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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)