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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.)

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.)

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.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office 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 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.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology 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 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.)

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment Editorial Office 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 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.)

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.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology 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 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 paper aimed to provide a reference basis for the safe production in tobacco fields with medium risk of Cd pollution and remediation, the uptake of Cd by tobacco and its distribution pattern in the whole plant were studied. [Method] The tobacco planting soil with medium risk of Cd pollution was selected for pot experiments to explore the remediation potential of 5 tobacco varieties for Cd in the contaminated soil and safety production about of tobacco. [Result] The concentrations of Cd（1.510-2.110 mg/kg) in 5 tobacco varieties were far less than the limit value of Cd（5.0 mg/kg) in Guizhou tobacco leaves. The order of Cd concentration of 5 tobacco varieties was as follows: Guiyan 8 > Yunyan 87 > CF225 > Nanjiang 3 > Bi’na 1.The Cd concerntration of Guiyan 8 was significantly higher than others. There were no significant difference between Bi’na 1 and Nanjiang 3, and they were significantly lower than others. All of 5 tobacco varieties had strong enrichment ability for Cd（127.695%-204.549%), and the order of enrichment ability was as follows: Bi’na 1>Yunyan 87>CF228>Guiyan 8>Nanjiang 3. The accumulation of Cd in Bi’na 1 had 583.102 μg/plant and the remediation efficiency of Cd in soil was 4.113%, more than 4 other tobacco varieties（2.269%-3.262%). The Cd of Bi’na 1 was mainly stored in the unusable parts such as roots, stems and leaf veins in the tobacco. The distribution rate of Cd in leaves of Bi’na 1 was the lowest with 41.03% concentration, which was lower than that of other tobaccos（above 50%). Bi’na 1 reduced the adverse factors（Cd concentration and distribution rate) in the tobacco production. [Conclusion] Among 5 tobacco varieties, Bi’na maximum accumulation amount of Cd, which mainly exists in unusable part, including root, stalk, leave vein, etc. Compared with other four tobacco varieties, Bi’na 1 reduces the disadvantages during tobacco production. Hence, Bi’na 1 has the potential for safe utilization and restoration of tobacco field medium-polluted by Cd. [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.)

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.)

[Objective]The present paper aimed to provide reference for screening low accumulation Cd cabbage varieties, the enrichment pattern of Cd in different varieties of cabbage and the safe limit value of Cd in cultivated soil was studied. [ Method ] Through pot experiment, six varieties of cabbage 'Zhongqingmaye' 'Mayehuoguocai' 'Gaokang 100' 'Kangbingdamaye' 'Jiwopadibai' 'Houye zaoshu 5') were studied for their biomass changes, Cd content from edible fraction, enrichment characteristics and the correlation between different varieties of cabbage and soil Cd content under the conditions of Cd concentration of O (CK), 0. 3, 0 . 6, l. 2, 2.4, 4. 8 mg/kg, respectively. [Result] There was not toxicity observed in cabbage with increasing Cd concentration. The Cd enrichment coefficients of different cabbage edible parts were 'Zhongqingmaye' (1. 61) > 'Kangbingdamaye' (1. 3 8) > 'Hou ye zaoshu 5' (1. 3 0) > 'Gaokang 100' (1. 02) > 'Mayehuoguocai' (0. 76) > 'Jiwopadibai' (0. 64 ). The enrichment coefficient of ' Mayehuoguocai' and 'Jiwopadibai' were less than l. According to Logistic equation, the correlation between Cd content from edible fraction of cabbage and Cd concentration in soil was significant, as 'Zhongqingmaye '(0. 9981) > 'Mayehuoguocai' (0. 9979 ) > 'Gaokang 100' (0. 9976) > ' Kangbingdamaye' (0. 9968) > 'Jiwopadibai' (0. 9949) > 'Houye zaoshu 5' (0. 9949). The corresponding safety limit values of Cd in soil for different cabbages were 'Jiwopadibai' (0. 30 mg/kg) > 'Gaokang 100' (0. 24 mg/ kg) > 'Mayehuoguocai' (0. 17 mg/kg) > 'Hou ye zaos hu 5' (0. 12 mg/kg) > 'Kangbingdamaye' (0. 09 mg/kg) > 'Zhongqingmaye' (0. 06 mg/kg). [Conclusion] Based on the tolerance and enrichment capacity of cabbage to Cd in soil and the corresponding soil safety limit value, 'Mayehuoguocai', 'Jiwopadibai' and 'Gaokang 100' were the low accumulation varieties of Cd. [ABSTRACT FROM AUTHOR]

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 Journal of Southern Agriculture is the property of Journal of Southern Agriculture 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.)

The characterization and spatial distribution of the content and source of heavy metals in soils are necessary to assess the potential threat of heavy metals to food safety and human health. In order to investigate the origin of heavy metals in paddy soils and rice in the Duyun city, 110 sampling sites were set in this study. The soil samples in arable layer of paddy and rice were collected, the contents of Cd, Hg, As, Pb and Cr were measured, and the data were analyzed by the multivariate statistical technique. A geographic information system (GIS) was used to explore the variety of spatial distributions for 5 heavy metals. Single factor pollution index, Nemero comprehensive pollution index and potential ecological risk index were applied to evaluate the degree of soil heavy metal contamination. Our results showed that the average contents of Cd, Hg, As, Pb and Cr in soils in the Duyun were (0.45±0.48), (0.23±0.29), (11.94±10.86), (36.95±32.98) and (60.80±31.73) mg/kg, respectively. The average contents of Cd, Hg, As, Pb and Cr in rice were (38.91±86.50), (5.82±2.96), (113.26±27.18), (89.42±24.87) and (175.92±82.12) μg/kg, respectively. The proportion of Cd, Hg, As, Pb and Cr contents more than the background values of the Guizhou province were 14.55%, 40.00%, 16.36%, 22.72%, 13.64%, respectively. Anthropic activities caused the enrichment of Hg in paddy soils. Only 3.64% of all rice samples exhibited Cd content exceeding the threshold level (20 μg/kg) in the Chinese national guidelines for cereals, and the other elements were below the national limit. Distribution maps of heavy metal content were generated using the Kriging interpolation method to identify their distribution trends. The results show that the influence of smelting activities, transport services and coal combustion on the spatial distribution. These suggested that the impacts of human activities on soil heavy metals in Duyun had exceeded the impact of natural source. Multivariate and geostatistical analysis suggested that soil Cr had a lithogenic origin. The correlation analysis and principal component analysis suggested that Cd, Hg, As and Pb could be attributed to anthropogenic inputs. The accumulation of Cd, Hg and As in soils was mostly affected by lead-zinc smelting, coal combustion and agronomic practices, and the main sources of Pb were lead-zinc smelting, industrial fume, coal burning exhausts. The current study confirmed that the environmental quality could be seriously threatened by heavy metal contaminants from the smelter and industrial activity. Therefore, the use of fossil fuels (coal and oil), fertilizers and the “three wastes” emissions from the key industrial enterprises in this area should be strictly controlled. [ABSTRACT FROM AUTHOR]

[Objective] The characteristics of As, Hg, Pb, Cd and Cr content in soils of main pitaya producing areas (Guanling, Luodian, Wangmo, Zhenfeng and Zhenning) was analyzed by using single-factor pollution index and Nemerow's pollution index methods according to the background value and Soil Environmental Quality Standard (NY/T 391-2013) and the pollution status of soil heavy metals in main pitaya producing areas was evaluated to provide the scientific basis for sustainable development of pitaya industry and improvement of orchard biosystem environmental quality in Guizhou. [Result] The As, Hg, Pb, Cd and Cr content in soils of main pitaya producing areas was 14. 00 , 0. 10, 25.20, 0.31 and 74.03 mg/kg,respectively. The heavy metals content of some soil samples was higher than the standard. The soil Cd content in Guanling County was significantly higher than the standard and the number of soil samples above the standard accounts for 26. 6 % of total soil samples. The soil integrated pollution index of Guanling pilaya producing area was 1.598 (mild risk) and the soil status of Zhenning pilaya producing area was the best. The heavy metal content in pilaya increases with increase of soil heavy metal content and the Cd and Pb content in pitaya was significantly related to Cd and Pb content in soil. The soil Pb, Cd and Cr content in Guanling County was the highest but the soil As and Hg content in Zhenleng County was the highest. The heavy metal content in pilaya was extremely low and did-nol cause harm to human health. The soil quality of main pilaya producing areas basically meets the soil environmental quality standard for green food in Guizhou. [Conclusion]The further pollution of soil heavy metals should be prevented by controlling and eliminating heavy metals accumulation of orchard soil. The soil Cd content should be paid more attention to in Guanling pitaya producing area. [ABSTRACT FROM AUTHOR]

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.)