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除草剂的除草效果,受到多种因素的影响,主要有土壤与气象条件两个重要因素。一、土壤因素1.土壤质地与有机质含量:含有机质高的粘性土壤,吸附除草剂的量最多,而有机质少的砂性土壤,则吸附药量较少,土壤对除草剂的吸附力强弱,取决于土壤胶体微粒的含量,有机胶体微粒吸附药剂性能较强。在砂性有机质含量少的土壤,用药量可少些,反之,在粘性有机质含量高的土壤,用药量应多些。例如43％甲草胺乳油在玉米或大豆田就应当根据土壤质地与有机质含量来确定用量,如下表:
Herbicidal herbicidal effect, subject to a variety of factors, mainly soil and weather conditions are two important factors. First, the soil factors 1. Soil texture and organic matter content: organic matter with high viscosity of the soil, the largest amount of adsorbed herbicides, and organic matter less sandy soil, the less the amount of adsorption, soil adsorption of herbicides strength , Depending on the content of soil colloidal particles, organic colloidal particles adsorbed strong performance. In the sandy organic matter content of the soil, the dosage can be less, on the contrary, in the viscous organic matter content of the soil, the dosage should be more. For example, 43% of alachlor EC in corn or soybean fields should be based on soil texture and organic content to determine the amount, as the following table: