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[Objective] The microecological structure of blueberry rhizosphere soil was analyzed from the perspective of growth-promoting mi- croorganisms to improve the blueberry planting soil. 【Method】 The microbial community structure of blueberry rhizosphere soil was analyzed by high-throughput amplicon sequencing. The growth-promoting characteristics of culturable bacteria in blueberry rhizosphere were analyzed by selective medium and colorimetry. [Result] The relative abundance of 10 bacterial phyla and 3 fungal phyla was greater than 1%, and the relative abundance of 13 bacterial genera and 11 fungal genera was greater than 1%. Occallatibacter OTU6, Paraburkholderia OTU3, and Chujaibacter OTU945 represented the highest numbers of counts more than other bacterial OTU sequences. Pseudogymnoascus OTU1, Fusar- ium OTU7, and Lentinus OTU2 represented the highest numbers of counts more than other fungal OTU sequences. The growth-promoting characteristics analysis of culturable bacteria in blueberry rhizosphere soil showed that, 12 growth-promoting bacteria that could produce aux- in were screened from culturable bacteria in blueberry rhizosphere soil, and L7 strain had the highest auxin production. These 12 growth-pro- moting bacteria could grow on the phosphorus-solubilizing medium, and had significant phosphorus decomposition halos. Strain L42 had the strongest phosphorus-solubilizing capacity. Strain L11 and L17 could break down silicates. There was no inhibition between L17 strain and L21, L26, L37, L40, L41. But there was strong inhibition between L21 and L26, L40 strains. 16S rDNA sequencing results showed that, these strains were identified as Buttiauxella, Paraburkholderia and Pseudomonas. [Conclusion] The results indicated that the diversity of mi- crobial community structure in blueberry rhizosphere was significantly different from that of other economic crops, and the growth-promoting bacteria had good phosphorus-solubilizing effect and auxin production capacity, which could provide experimental basis for the subsequent development of blueberry rhizosphere microbial fertilizer. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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.)

【Objective】The main factors influencing rice yield and its composition factors under rapeseed-rice rotation would be found out. 【Method】In this paper, two strains of rice(K You 082 and XF You 901) were used as experimental materials to study the effects of geographical environment and soil fertility on rice yield and its constituent factors by using correlation analysis and principal component analysis. 【Result】The yield of the four sampling areas was in the range of 606.7-680.5 kg, and the thousand-grain weight was in the range of 29.0-31.9 g; The seed setting rate was in the range of 80.7 %-86.9 %; The grains were in the range of 160.4-182. 5 grains; The spike number were 16.2-18.3 spike. The seed setting rate was significantly correlated with hectare yield(correlation coefficient was 0.626).The altitude of four sampling sites were in the range of 260-820 m, the longitude range was 105 ° 60’-109 ° 01 ’, and latitude 32 ° 42’-33 ° 12’. The concentration ranges of organic carbon, nitrate nitrogen, ammonium nitrogen, P and K were 109.7-256.5, 0.068-0. 220, 0.708-2. 0, 0.042-2.2, 10.3-32.1 g/kg, respectively. 【Conclusion】By means of the correlation and principal component analysis, it was found that the main factors affecting the seed setting rate were the altitude and longitude of rice planting, the organic carbon and ammonium nitrogen in the three rice growth stages, the nitrate and K in the five leaf stage and tillering stage, which indicated that the altitude and longitude, soil organic carbon, nitrogen content and K element content of rice cultivars had significant effects on rice yield. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan 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.)

[Objective] The present study aims to analyze the variation tendency of elements in rice rhizosphere soil under the rape-rice rotation system in Southern shaanxi. [Method] The distributions of P, K, Ca, Mg, Na, Fe, Mu, Zn, Cr and Cu of different rice strains in different stages at three sampling sites by inductively coupled plasma emission spectrometry method were studied. [Result] The concentration ranges of P, K, Ca, Mg, Na, Fe, Mn, Zn, Cr, Cu were 41.6 - 2189. 2, 103 01.2 -32 141.2, 198.7 -6517.3, 6101.3 -30 021.0, 2761.2 - 15 293.2, 8907.6 - 106 080.0, 165.4 -790.4,6.2 -39.4, 39.4 -91.3, 3. 3 -43. 3 mg/kg, respectively. Significant difference was found in the concentrations of nutrient elements. There were good correlations between metal elements. The results of water content and pH of soil showed that soil water content was in accordance with the growth characteristics of rice. Water content at the booting stage of rice was higher, and the sampling area could reach at 50%. In addition to the Ankang area (pH5.5 -6.5), the rest of sampling sites were neutral soil, which were all suitable for rice growth. [Conclusion] This study revealed the trend of soil elements in rhizosphere of rice and played a theoretical role in rational fertilization and soil and water conservation. [ABSTRACT FROM AUTHOR]