科学合理地选用叶面肥,对蔬菜来讲,更显得重要。因为蔬菜在苗期、中期、后期都要进行根外追肥,借以促进茎叶生长和恢复生机(移栽苗),提高产量和改善品质,有时在防治病虫害和使用植物生长调节剂时,如能混合叶面肥喷施,便可获得双重效果。下面根据不同类型的蔬莱,谈谈叶面肥的选择和使用技术: 一、叶菜类:这类蔬菜的生长特点是全生育期需要肥水较多,尤对速效氮肥更为敏感和迫切,如氮肥不足,则叶片黄绿、生长迟缓、产量 Scientific and rational use of foliar fertilizer, the vegetables are concerned, even more important. Because vegetables in the seedling, metaphase, late root top dressing, in order to promote the growth of stems and leaves and restore vitality (transplanting), improve yield and improve quality, and sometimes in the control of pests and plant growth regulator, if Mixed foliar spray, you can get double effect. The following according to different types of vegetables Lai, talk about the choice and use of foliar fertilizer technology: First, leafy vegetables: the growth of these vegetables is characterized by the need for more fertilizers throughout the growth period, especially for more sensitive to nitrogen and more urgent, Such as lack of nitrogen, then yellow-green leaves, growth retardation, yield