叶面施肥是补充和调节作物营养的有效措施,特别是在逆境条件下,常能发挥特殊的效果,但任何事物都是一分为二的,近几年来农民反映比较强烈的问题就是使用效果不佳,为提高叶面施肥的效果,指导农民正确使用,有必要对叶肥使用不佳的原因进行探讨。一、叶肥假劣在中国叶肥市场上,由于市场竞争日趋加剧,假冒、伪劣、过期、失效叶肥,甚至“三无”产品投放市场,这些叶肥不仅达不到规定的质量标准,而且内部分子结构已发生了化学变化,因不能溶于水,而失去效果。二、肥不对症各种叶肥都有一定的特性和作用,在生产中要根据土壤养分状况、基肥 Foliar fertilization is an effective measure to supplement and regulate crop nutrition. Especially under adverse conditions, it can often exert special effects. However, everything is divided into two parts. In recent years, peasants have a rather strong problem of using the effect Poor, in order to improve the effect of foliar fertilization and guide peasants to use correctly, it is necessary to discuss the reasons for the poor use of leaf fertilizer. First, foliar counterfeit fertilizer market in China, due to increasing market competition, counterfeit, fake and inferior, expired, the failure of leaf fertilizer, and even the “three no ” products on the market, these foliar fertilizer not only failed to meet the required quality Standard, and the internal molecular structure has undergone chemical changes, because they can not dissolve in water, and lose their effect. Second, the fat is not right All kinds of leaf fertilizer has a certain characteristics and role in the production of soil nutrients according to the situation, the base fertilizer