关键因子对香蕉秸秆堆肥资源化过程中的乐果降解动态研究

Study on Degradation of Dimethoate in Banana Straw-manure

乐果在香蕉生长过程中经常作为防治害虫的农药而使用,且成为日常果蔬安全检测的重要对象。本研究通过单因子梯度试验,研究香蕉秸秆堆肥过程中的关键影响因子(C/N、温度、含水率、pH及通风方式)对乐果残留降解速率的影响。结果显示,香蕉秸秆堆肥对乐果具有明显的降解作用,利用非线性动力学模型分析影响降解的各单因素得出,在通风方式为机械翻堆下,C/N为35:1,温度为40℃,pH为9.7,含水率为40%时,乐果在香蕉秸秆堆肥过程中达到最佳降解速率,其最小降解半衰期为0.15d(3.6h)。

Dimethoate are usually used in banana products, it is important object detected in daily safety for fruits and vegetables, Researching the degradation of dimethoate in the straw compost by the key-factors --C/N, temperature, moisture content and pH and ventilation mode. The results show that, degradation of dimethoate are obvious in banana straw compost, on the ventilation mode of turn over, the best degradation condition of dimethoate is C/N=35：1, 40℃, moisture content：40%, pH=9.7; With Non-linear kinetic model to calculate, the least half-life of dimethoate is 3.6h.