毛主席教导我们:“肥料是植物的粮食”。没有充足的肥料,植物就不能正常生长发育,获得高产。但植物所需的肥料是多种多样的,我们平常所使用的氮、磷、钾,仅仅是植物所最需要的一部分,称为肥料三要素,仅靠这些还不够,还需要其他营养元素,而需要的量有所不同,对有些元素植物所需要的量是很少很少的,但又不可缺少,称为微量元素。据目前所知,103种化学元素,植物就需要70多种。因此,我们对农作物施肥,不能光考虑氮、 Chairman Mao taught us: “Fertilizer is the food of plants.” Without adequate fertilizers, plants can not grow normally and gain high yields. However, the fertilizers required by plants are varied. The nitrogen, phosphorus and potassium that we normally use are just the most needed parts of plants, called the three elements of fertilizers. Only these are not enough, and other nutrients, The amount required is different, for some elements of the amount required by plants is very small, but indispensable, called trace elements. As far as I know, 103 kinds of chemical elements, plants need more than 70 kinds. Therefore, we fertilize crops, we should not consider nitrogen,