钝化剂与有机肥配施对土壤有效态重金属及其在生菜中累积的影响

doi:10.19741/j.issn.1673-4831.2018.0793

摘要/Abstract

摘要： 为降低农业土壤重金属污染风险，减少农产品重金属富集，通过温室盆栽生菜试验，开展生物质炭、磷矿粉、碳酸钙和凹凸棒4种钝化剂与有机肥配施对Cu、Cd污染土壤有效态重金属及生菜累积重金属影响的研究。结果表明：（1）尽管钝化剂能降低土壤有效态重金属含量，但由于有机肥的活化作用，钝化剂与有机肥配施处理时土壤有效态重金属含量与对照相比仍有所提高；（2）与对照相比，不同配施处理均能降低生菜地上部Cu和Cd含量，单施有机肥处理生菜地上部Cu和Cd含量分别降低13%和27%，4种钝化剂与有机肥配施处理则分别降低4%~28%和2%~35%，碳酸钙与有机肥配施处理下降效果最佳；（3）相关性分析表明单施有机肥以及钝化剂与有机肥配施处理能抑制植物对Cu和Cd的吸收转运，使生菜地上部对Cu和Cd的累积降低。

关键词: 钝化剂, 有机肥, 碳酸钙, 重金属污染土壤

Abstract: Effects of 4 amendments[biochar, phosphate rock, calcium carbonate (CaCO₃), and attapulgite] combined with compost on copper (Cu) and cadmium (Cd) concentrations in romaine and available Cu and Cd in a Cu-Cd contaminated soil were investigated in a pot experiment. The results show that although amendments could decrease the available Cu and Cd concentrations in soil, while because of the activation by compost, amendments combined with compost still increased available Cu and Cd concentrations in soil compared with the control, but they decreased Cu and Cd concentrations in romaine by 4%-28% and 2%-35% respectively, and the remediation efficiency of CaCO₃ combined with compost was better than other treatments. Relativity analysis show that compost alone and amendments combined with compost could inhibit the uptake and transport of Cu and Cd by romaine, thus reduced their accumulation in romaine.

Key words: amendment, compost, calcium carbonate, heavy metal contamination soil

中图分类号:

赵家印, 席运官, 代慧杰, 金淑, 田伟. 钝化剂与有机肥配施对土壤有效态重金属及其在生菜中累积的影响[J]. 生态与农村环境学报, 2019, 35(11): 1460-1467.

ZHAO Jia-yin, XI Yun-guan, DAI Hui-jie, JIN Shu, TIAN Wei. Effects of Compost Combined With Amendments on Available Copper and Cadmium in Soil and Their Accumulation in Romaine[J]. Journal of Ecology and Rural Environment, 2019, 35(11): 1460-1467.

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