除莠剂和化学肥料一样,是植物生理学研究的直接产物,没有生长激素的理论研究,就不可能出现现在广泛应用的除莠剂。大面积施用的有机除莠剂,每亩用量不足100克,却足以有效地杀除与作物亲缘很近的杂草,而对作物无大伤害,就是由于它在作物与杂草的生理效应上有差异。如果不能确切地了解差异所在,往往会使用不当,得不到应有的效果,甚至造成损失。因此,为了更合理、有效地使用除 Herbicides, like chemical fertilizers, are the direct products of plant physiology, and the absence of theoretical studies of growth hormones makes it impossible to find herbicides widely used today. Large area applications of organic herbicides, less than 100 grams per acre, are sufficient to effectively kill weeds that are closely related to the crop without causing major damage to the crop due to its physiological effects on crops and weeds Differences. If you do not know exactly where the differences lie, they are often used improperly, deprived of their due effect, or even lost. Therefore, in order to be more rational and effective use of division