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| Effects of different amendments on growth and Pb, Cd, As, Zn uptake by Zea mays |
| Received:April 25, 2016 |
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| KeyWord:amendments;heavy metals;availability;Zea mays |
| 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 | | | 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 | | | CHENG Zai-quan | Biotechnology & Genetic Resources Institute, Yunnan Academy of Agriculture Sciences, Kunming 650223, China | | | ZENG Min | Biotechnology & Genetic Resources Institute, Yunnan Academy of Agriculture Sciences, Kunming 650223, 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 100101, China | leim@igsnrr.ac.cn | | LUO Hong-mei | Biotechnology & Genetic Resources Institute, Yunnan Academy of Agriculture Sciences, Kunming 650223, China | |
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| Abstract: |
| Field experiments were conducted to investigate the effects of diatomite, biochar, zeolite and lime and their additive proportion on maize growth and lead(Pb), cadmium(Cd), arsenic(As) and zinc(Zn) uptake by maize kernels and the available Pb, Cd, As and Zn in soil. The results showed that except lime,three amendments could improve maize growth and increase plant height, leaf area as well as biomass. The yield of maize was also significantly increased. All four amendments could increase soil pH values and reduce the concentration of available Pb, Cd, As and Zn in soil. Compared to the control treatment, applying different amendments led to a decrease of available Pb content in soil by 6.82%~20.46%, available Cd by 12.76%~28.28%, available As by 26.89%~48.74%, and available Zn by 13.88%~28.95%. Additions of BZD(biochar+zeolite +diatomite) was the most available treatments to decrease the available content of heavy met als in soil, and BLD(biochar+lime+diatomite) was ranked to be the second. At the same time, All four amendments could all reduce Pb, Cd, As and Zn uptake by maize kernels. Compared to the control treatment, the application of BDZ reduced the concentration of Pb, Cd,As and Zn in maize kernels by 47.71%, 95.00%, 90.90% and 31.41% respectively. Our results in this study demonstrated that applying BDZ additive proportion amendments was the best functional amendments for the remediation of heavy metal contaminated soil of Cd-As-Zn. |
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