环境条件对土壤中啶虫脒降解的影响

Effect of Environmental Conditions on the Degradation of Acetamiprid in Soil

[目的]研究土壤中啶虫脒在不同环境下的降解规律。[方法]在室内研究了环境条件对土壤中啶虫脒降解动态的影响。[结果]温度和湿度均可影响土壤啶虫脒降解,温度过高或过低均不利于啶虫脒降解,在25、35℃时,其降解较快,半衰期(t1/2)分别为8.12、5.34 d,在15、50℃时,t1/2分别为18.43、11.75 d;其降解的最适土壤湿度为40%、60%,t1/2分别为8.06、8.12 d;在灭菌和未灭菌土壤中,其t1/2分别为29.37、8.12 d。[结论]微生物降解是啶虫脒在土壤中的主要降解形式,影响微生物活性的因素均能影响其在土壤中的降解。

In order to research the degradation regular of acetamiprid in soil under different conditions.[Methods]The effect of environmental conditions on the degradation dynamic of acetamiprid in soil wasresearched in lab conditions.[Results]The degradation of acetamiprid in soil were affected by temperature andsoil humility,excess or too low temperature was detrimental to the degradation,25 and 35°C were the optimumtemperature,the half-life value of acetamiprid（t1/2）were 8.12 and 5.24 d respectively,at 15 and 50°C,the t1/2were18.43 and 11.75 d.The optimum soil humilities to the degradation of acetamiprid were 40 and 60%,the t1/2were8.06 and 8.12 d,the t1/2in unsterilized soil and sterilized soil were 29.37 and 8.12 d,correspondingly.[Conclusions]Primarily,the degradation of acetamiprid in soil was induced by microbe,the factors which affect microbialactivity could affect its degradation in soil.