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甲氰菊酯在苹果园土壤中的降解行为研究

Keywords: 甲氰菊酯,降解,土壤性质,微生物,温度

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Abstract:

为了评价甲氰菊酯在苹果园使用后的生态环境行为和效应,采用室内模拟方法,借助气相色谱分析技术,研究了甲氰菊酯在3种苹果园土壤中的降解半衰期与土壤理化性质和环境条件的关系。结果表明,甲氰菊酯在土壤中的降解主要是微生物降解,非生物降解所占比例较小,降解规律符合一级动力学模型,在25℃时降解半衰期为27.5~30.4d;甲氰菊酯在苹果园土壤中降解的半衰期与土壤有机质含量和土壤pH值呈显著高度负相关,常温下相关系数为0.9;综合微生物降解和非生物降解因素,苹果园土壤中甲氰菊酯降解的适宜温度是30~35℃。

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