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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)。
It is often used as a pesticide for pest control during the growth of bananas and has become an important target for daily safety inspection of fruits and vegetables. In this study, the single factor gradient test was used to study the effect of critical factors (C / N, temperature, water content, pH and ventilation) on the degradation rate of banana straw during composting. The results showed that banana straw composting had a significant effect on the degradation of dimethoate, and the non-linear kinetic model was used to analyze the single factors that affect the degradation. Under the condition of ventilation, the C / N ratio was 35: 1 and the temperature was When the pH value is 9.7 and the moisture content is 40%, the optimum degradation rate of dimethoate during banana straw composting is 40 ℃, and its minimum half-life of degradation is 0.15d (3.6h).