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实验室条件下,研究了烯酰吗啉在土壤中的降解动态特性。结果表明,烯酰吗啉在供试吉林黑土、河南褐土和江西红土中的降解半衰期分别为69、69和462 d,在土壤中的降解性能为中等至难降解。其Z式异构体在吉林黑土、河南褐土和江西红土中的降解半衰期分别为89、126和533 d,E式异构体的降解半衰期分别为53、29和408 d,在3种土壤中Z式异构体的降解速率均低于E式异构体。河南褐土中E/Z的比值在降解过程中发生了明显变化。实验室条件下,烯酰吗啉在土壤中的降解速率明显低于其在田间土壤中的降解速率。
Under laboratory conditions, dynamic degradation of dimethomorph in soil was studied. The results showed that the degradation half-lives of dimethomorph in the tested Jilin black soil, Henan cinnamon soil and Jiangxi laterite were 69, 69 and 462 d, respectively. The degradability in the soil was moderate to refractory. The degradation half-lives of Z isomers in Jilin black soil, Henan cinnamon soil and Jiangxi laterite were 89, 126 and 533 d, respectively, and the half lives of E isomers were 53, 29 and 408 d, respectively. The degradation rate of Z-isomers was lower than that of E-isomers. The ratio of E / Z in the cinnamon soil in Henan Province changed obviously during the degradation process. Under laboratory conditions, the degradation rate of dimethomorph in soil was significantly lower than that in field soil.