近年来化学除草剂作为一项农业新技术,从试验到推广迅速地发展起来.化学除草技术有哪些优点呢?第一,除草剂效力强,除草效果好,能把绝大多数杂草消灭在幼苗时期,并在较长时期内控制杂草的滋生.第二,通常种植一茬作物只需施用一次除草剂,节省了大量锄草用工.第三,经济效益高,使用除草剂后,农作物的产量和质量都有很大提 In recent years, chemical herbicides as an agricultural new technology, from testing to the promotion of rapid development.What are the advantages of chemical weed control technology? First, herbicides and strong, herbicidal effect, the vast majority of weeds can be eliminated Seedling stage, and in a long period of time to control the breeding of weeds.Second, usually only need to apply a herbicide once a crop is planted, saving a lot of weeding workers.Third, the high economic benefits, the use of herbicides, the crops The yield and quality are very large mention