凹凸棒石施用对镉污染土壤理化性质及小白菜生长的影响
Journal of Anhui Agricultural Sciences(2017)
Abstract
[目的]明确凹凸棒石对重金属污染土壤中镉的治理效果.[方法]以小白菜为试验材料,开展小白菜盆栽试验,分析施用凹凸棒石后小白菜的长势、土壤养分和土壤重金属镉含量.[结果]适量添加凹凸棒石可有效增加小白菜的产量,提高酸性土壤的pH,但过量[≥2.0%(m/m)]添加会导致土壤速效养分降低;施用凹凸棒石对镉污染土壤的修复具有显著效果,可有效降低土壤有效镉含量和小白菜对镉的吸收.[结论]试验推荐凹凸棒石添加比例为1.0%.
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