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| Effects of some minerals on fractions and phytoavailability of Cd in Cd-contaminated soil |
| Received:August 13, 2015 |
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| KeyWord:minerals;Cd;fraction distribution;phytoavailability |
| Author Name | Affiliation | E-mail | | XIE Fei | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | YU Hai-ying | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | haiyingaa1@163.com | | LI Ting-xuan | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | ZHANG Xi-zhou | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | ZHENG Zi-cheng | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | CHEN Guang-deng | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | |
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| Abstract: |
| A pot experiment was carried out to study the effects of five minerals(sepiolite, Ca-bentonite, Na-bentonite, white marble, and lime) at three application rates on soil pH, available Cd, and Cd fractions as well as plant biomass and Cd content of Brassica chinensis L. in Cd-contaminated soil. Applying the five minerals significantly increased soil pH by 0.1~0.7, decreased soil available Cd by 9.19%~18.92% in a dose-effect manner, compared to the control treatment. Applications of minerals dramatically changed acid extractable Cd and residual Cd which was more prominent in sepiolite and Na-bentonite treatments. Compared with the control treatment, the proportion of acid extractable Cd decreased by 3.27%~8.68% and that of the residual Cd increased by 1.35%~4.75% in mineral treatments. The Cd content in both shoot and root of Brassica chinensis L. in mineral treatments decreased by 16.03%~42.95% and 20.69%~50.34%, respectively, compared with the control. Sepiolite, Na-bentonite and lime showed better performance in reducing the Cd content of Brassica chinensis L. However, applications of minerals remarkably decreased shoot biomass of Brassica chinensis L., compared to the control, except sepiolite and Ca-bentonite. |
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