杂草与作物争养分、水分和阳光,导致作物产量下降,品质降低。在长期的农业生产实践中,人们采用了各种各样的方法与杂草作斗争,其中化学除草法见效快、成本低、防除彻底,越来越受人们重视。不少人提出为什么化学除草剂只杀灭杂草而不伤害农作物呢?主要是根据化学除草剂的药性特点,最大限度地 Fighting weeds with crops, moisture and sunlight led to a decline in crop yields and quality. In the long-term practice of agricultural production, people have used a variety of methods to combat weeds. Among them, the chemical weeding method is quick, low cost and thorough control, attracting more and more attention. Many people put forward why chemical herbicides kill only weeds without harming crops? It is mainly based on the chemical characteristics of chemical herbicides, to the maximum extent