生物炭与肥料复配对土壤重金属镉污染钝化修复效应

通过田间实验,研究了生物炭与有机肥及氮磷钾复合肥复配施用对菜地土壤重金属镉污染钝化修复效应,并探讨了作用机制。结果表明,菜地土壤添加不同钝化材料可显著降低油麦菜地上可食部位Cd的累积量,降幅可达32.6%～54.8%,各钝化处理的菜地土壤有效态Cd含量均出现显著降低,降幅可达7.04%～21.85%,施用生物炭可以显著提高菜地土壤pH值,有利于促进对土壤重金属Cd活性的钝化作用;而施用鸡粪却明显降低菜地土壤pH值,不利于菜地土壤重金属Cd的钝化作用。土壤pH值与油麦菜根部Cd累积量间呈显著的正相关性,但与油麦菜地上可食部位Cd累积量间的相关性并未达到显著性水平。该项研究可为生物炭与有机肥及氮磷...

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Published in农业资源与环境学报 Vol. 32; no. 6; pp. 583 - 589
Main Author 王期凯 郭文娟 孙国红 林大松 徐应明 刘静茹 于士雷
Format Journal Article
LanguageChinese
Published 农业农村部环境保护科研监测所 25.12.2015
中国农业生态环境保护协会
Subjects
土壤修复
复合肥
生物炭
镉
鸡粪
镉
复合肥
鸡粪
生物炭
土壤修复
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ISSN2095-6819
2095-6819

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Summary:通过田间实验,研究了生物炭与有机肥及氮磷钾复合肥复配施用对菜地土壤重金属镉污染钝化修复效应,并探讨了作用机制。结果表明,菜地土壤添加不同钝化材料可显著降低油麦菜地上可食部位Cd的累积量,降幅可达32.6%～54.8%,各钝化处理的菜地土壤有效态Cd含量均出现显著降低,降幅可达7.04%～21.85%,施用生物炭可以显著提高菜地土壤pH值,有利于促进对土壤重金属Cd活性的钝化作用;而施用鸡粪却明显降低菜地土壤pH值,不利于菜地土壤重金属Cd的钝化作用。土壤pH值与油麦菜根部Cd累积量间呈显著的正相关性,但与油麦菜地上可食部位Cd累积量间的相关性并未达到显著性水平。该项研究可为生物炭与有机肥及氮磷钾复合肥复配修复污灌菜地土壤重金属镉污染提供一定的理论基础。
Bibliography:12-1437/S
WANG Qi-kai, GUO Wen-juan, SUN Guo-hong, LIN Da-song, XU Ying-ming, LIU Jing-ru, YU Shi-lei （ 1.College of Technology, Tianjin Agricultural University, Tianjin 300384, China; 2.Innovative Team of Heavy Metal Contaminated Farmland Remediation for Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China; 3.Key Laboratory of Original Environmental Quality of Ministry of Agriculture, Tianjin 300191, China）
The field experiment was employed to study on the combined effects of biochar and chicken manure and N, P and K compound chemical fertilizer on cadmium contaminated soil remediation, and the immobilization mechanism was elucidated through fractionation of cadmium in the tested soil. Results showed that the addition of these ammendments could significantly reduce the edible Cd accumulation in Lactuca sativa L., decreased from 32.6% to 54.8% compared with the control. The application of these additives could also significantly decrease extractable Cd concentration by 7.04%～
ISSN:2095-6819
2095-6819