防除农田杂草的除草剂具有一定的选择性。但在使用过程中,由于除草剂选择性差或使用不当等,均会给作物带来不同程度的药害。为了降低除草剂对作物的伤害作用,国内外学者作了许多有关降低药害的研究工作,如根据不同的作物选用不同的除草剂,改进除草剂的使用方法,培育抗药力强的作物品种和研究使用化学物质来降低除草剂的损害等。目前已 Herbicide control of farmland weeds has some selectivity. However, due to the poor selectivity or improper use of the herbicide, the crop plants may bring different degrees of phytotoxicity during use. In order to reduce the harm of the herbicide to crops, scholars at home and abroad have made many researches on reducing phytotoxicity, such as selecting different herbicides according to different crops, improving the usage of herbicides, cultivating resistant crop varieties and Research using chemicals to reduce the damage of herbicides. Currently there