三唑酮在油菜-土壤生态系统中的降解与建模

为评价三唑酮可湿性粉剂在土壤-油菜生态系统中使用后的残留行为和环境安全性,进行了2 a大田试验,并比较了指数模型、GM(1,1)灰色模型、阻滞动力学模型对三唑酮降解规律的描述。结果表明:3种模型的拟合结果均达到统计学意义上显著相关;对三唑酮在土壤和油菜中降解行为模拟结果最好的分别为GM(1,1)模型和阻滞动力学模型;三唑酮在土壤中2 a的半衰期分别为3.48和4.38 d,油菜植株中分别为1.98和3.78 d,其降解受温度影响较大。

Dynamic Degradation and Modeling of Degradation of Triadimefon in Soil/Rape System

A two-year field experiment was carried out to evaluate degradation behavior and environmental safety of triadimefon WP in the soil/rape ecosystem and three simulant kinetic models were built up to simulate dynamic degradation of triadimefon in the soil/rape ecosystem and compared with each other.The results show that the fitting results of all the three kinetic models reached the level of statistic significance in relationship.However,the GM(1,1)and the retardation kinetic models were better than the other in simulating degradation of triadimefon in the soil/rape ecosystem.The half-life of triadimefon in the soil of 2003 and 2004 were 3.48 and 4.38 d,respectively,and in rape 1.98 and 3.78 d,respectively.The dynamic degradation of triadimefon in the soil/rape ecosystem was much influenced by the environmental temperature.