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| Effects of rice and corn rotation on cadmium uptake in double-cropping cadmium-polluted paddy rice fields |
| Received:May 29, 2018 |
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| KeyWord:soil cadmium pollution;water and drought rotation;bio-accumulation;translocation |
| Author Name | Affiliation | E-mail | | WU Jia-mei | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | | | XIE Yun-he | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | TIAN Fa-xiang | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | GUAN Di | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | ZHU Jian | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | CHEN Jin | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China | | | JI Xiong-hui | Institute of Agro-Environment and Ecology, Hunan Province, Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Ministry of Agriculture, Changsha 410125, China
Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | 1546861600@qq.com |
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| Abstract: |
| In this study, we examined the effects of rice and corn rotation on soil effective cadmium (Cd) levels, Cd levels in various parts of rice and corn, and coefficients of accumulation and transfer in lightly Cd-polluted (Cd 0.35 mg·kg-1) double-cropping paddy rice fields. The results showed that the average content of Cd in rice roots, stems and leaves, and grains was 3.66, 1.30 mg·kg-1, and 0.36 mg·kg-1, respectively; the content of Cd in corn roots, stems and leaves, and grains was 0.50, 0.12 mg·kg-1, and 0.03 mg·kg-1, respectively; the average bio-accumulation coefficients corresponding to rice roots, stems and leaves, and grains were 11.96, 4.27, and 1.19, and those in corn were 1.73, 0.50, and 0.13, respectively; the transfer coefficients from rice roots to the stems and leaves and from the stems and leaves to grains were 0.36 and 0.28, whereas those in corn were 0.24 and 0.20, respectively; the content of Cd in late rice grains was higher than that in early rice grains, and the content of Cd in autumn corn grains was higher than that in spring corn grain; the alkali hydrolysable nitrogen, available phosphorus, and rapid-acting potassium in the soil had no effects on Cd uptake by crops; and the planted corn was slightly more productive than rice during the same season. In summary, planting corn instead of later rice replanting may ensure safer crop grains in lightly Cd-polluted double-cropping paddy rice fields. This rotation can be considered a recommendable planting system. |
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