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二甲戊乐灵在土壤中的吸附及微生物降解

Keywords: 二甲戊乐灵,吸附,土壤微生物,降解

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Abstract:

通过振荡平衡法和室内培养法分别研究了二甲戊乐灵在土壤中的吸附和降解规律。结果表明,二甲戊乐灵在棕壤中容易被吸附,且解吸困难,其吸附属于物理性吸附。二甲戊乐灵在土壤中的降解主要是土壤微生物的作用,其在灭菌土壤中降解速率很慢。土壤含水量的多少对其降解速率有一定影响。30%FC下二甲戊乐灵在灭菌及未灭菌土壤中的半衰期分别为182.4d和162.2d;75%FC下的灭菌土壤中半衰期为97.63d,是其在未灭菌土壤中半衰期35.36d的2.76倍;在120%FC下灭菌土壤中的半衰期为87.74d,是其在未灭菌土壤中半衰期31.80d的2.76倍。

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