微量元素是植物和动物正常生活和生长所必需的营养元素。生物体中的微量元素多为酶,辅酶的组成成份,他们的作用机制有很强的专一性,是生物正常生活和生长所不可缺少的,也是不可相互代替的。虽然微量元素在土壤中和在生物体内含量很少,但是,所起的作用却很大,土壤中的微量元素供给不足时,农作物就会出现缺乏症状,产量减少、质量降低。然而,如果土壤中微量元素过多,又会发生植株中毒。影响到农作物的产量和质量。氮、磷、钾等大量元素和微量元素不能相互代替。微量元素只有在 Trace elements are essential nutrients for the normal life and growth of plants and animals. Organisms trace elements are mostly enzymes, coenzyme components, their mechanism of action has a strong specificity, is the normal life and growth of biological indispensable, but also can not be replaced with each other. Although trace elements in the soil and in the body content is very small, but played a very large role in the supply of trace elements in the soil is insufficient, there will be lack of crop symptoms, reduce production, reduce quality. However, plant poisoning can occur if there is too much trace element in the soil. Affect the yield and quality of crops. Nitrogen, phosphorus, potassium and other large elements and trace elements can not be replaced by each other. Trace elements only