铁、硼、锰、铜、锌、钼、氯等元素,在化学肥料中称微量元素,即微肥。微量元素在植物体内含量约占干物质重量的十万分之几到千分之几。虽然含量很少,但在植物体内是酶和辅酶的组成部分,是植物生长发育所必需的,且具有不可替代性。在农业生产中,随着氮、磷、钾肥的大量施用和土地复种指数的提高,微量元素的需要也随之增加。而微量元素的补充往往被忽视。当作物缺乏任何一种微量元素时,便 Iron, boron, manganese, copper, zinc, molybdenum, chlorine and other elements, said in the chemical fertilizer trace elements, namely, micro-fertilizer. Trace elements in the plant content of about one hundred thousandths of dry matter weight to a few thousandths. Although its content is very small, it is an integral part of enzymes and coenzymes in plants, which is necessary for plant growth and development and is irreplaceable. In agricultural production, with the large application of N, P and K fertilizers and the improvement of crop multiplication index, the demand of trace elements also increases. The supplementation of trace elements is often overlooked. When crops lack any trace elements, then