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| Differences of cadmium and zinc accumulation and translocation in different varieties of Zea mays |
| Received:July 02, 2016 |
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| KeyWord:Zea mays;cadmium;zinc;accumulation and translocation;screening |
| Author Name | Affiliation | E-mail | | DU Cai-yan | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
Plant Protection College, Yunnan Agricultural University, Kunming 650201, China | | | ZHANG Nai-ming | College of Resource and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LEI Bao-kun | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | | | HU Wan-li | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | | | FU Bin | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | | | CHEN An-qiang | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | | | MAO Yan-ting | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | | | MU Lin | Agricultural Environmental Protection Monitoring Station of Yunnan Province, Kunming 650201, China | | | WANG Hong-hua | Agricultural Environmental Protection Monitoring Station of Yunnan Province, Kunming 650201, China | | | YAN Ting-ting | Agricultural Environmental Protection Monitoring Station of Yunnan Province, Kunming 650201, China | | | DUAN Zong-yan | Institute of agricultural Environment & Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | duanzongy@163.com | | LEI Mei | Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 10010, China | leim@igsnrr.ac.cn |
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| Abstract: |
| In the heavy metal contaminated soil of cadmium-zinc(Cd-Zn), the effects of Cd and Zn on the growth of 20 maize varieties along with differences of Cd and Zn accumulation and transfer between different maize varieties were studied in field experiments. The purpose of the field experiments was to screen out maize varieties with low accumulation ability of Cd and Zn. The results showed that there were significant differences among 20 maize varieties of plant height, leaf area, biomass as well as yield under combined stress of Cd and Zn. Meanwhile, there were significant differences among 20 maize varieties of Cd and Zn uptake by root, stem and leaf, kernels Cd and Zn accumulation and translocation ability(P<0.05). The seed Cd contents of 2 varieties were more than the food sanitation standards set by the state(≤0.2 mg·kg-1). The stem and leaf Cd contents of 13 varieties were more than the national feed hygiene standard(≤0.5 mg·kg-1). The kernel stem and leaf Zn contents of 20 varieties conformed to the food sanitation standards(≤50 mg·kg-1). The Cd enrichment coefficients of 7 maize species<1, the stem and leaf transfer coefficient of 13 maize species<1, and all the seed transport coefficients were less than 1.Data analysis results showed that there were still certain absorption capacity of the maize to soil Cd, but the transport capacity from root to shoot and from stem and leaf to grain was weak——The Zn enrichment coefficients of 20 maize species<1,the stem and leaf transfer coefficient of 18 maize species<1, and the seed transport coefficients of 6 maize species<1.Data analysis results showed that the absorption capacity of the maize to soil Zn and the transport capacity from shoot and stem to grain were strong. Evaluated by the index of maize biomass, grain yield, Cd and Zn content, Cd and Zn enrichment coefficient and transfer coefficient, 5 varieties of Hong Dan 6, Hong Yu 1, Yun You 78, Ping Dan 2 and Ping Dan 2 could be used as Cd low accumulation Maize Varieties, and Ya Yu 98 could be used as Zn low accumulation Maize Varieties, and were fit to be planted in Cd, Zn polluted soil in Gejiu lightly and moderately. |
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