化肥、农药是现代农业不可或缺的生产资料。为提高产量和品质,农民追施化学肥料的次数和种类日益增加,其中叶面喷肥由于用肥量小、见效快,已经成为农民,特别是果农和菜农经常采用的技术措施;另一方 Fertilizers and pesticides are indispensable means of production in modern agriculture. In order to increase the yield and quality, the number and type of topdressing chemical fertilizers are increasing day by day. Among them, the foliar spraying has become the frequently adopted technical measure by peasants, especially fruit growers and vegetable growers due to the small amount of fertilizer used and quick results.