微量元素指土壤中含量很低的化学元素,这些元素的含量范围一般为百万分之几到十万分之几。锌是植物生长不可缺少的重要微量元素,锌与植物生长素,氮代谢、有机酸代谢及酶促反应均有密切关系,在植物体中它的含量甚少,但在生命过程中起的作用却十分重要。锌象其他营养元素一样,既不可缺少,也不能代替。土壤中锌的供给不足时,水稻出现缺锌症状,产量减少,质量降低,严重缺乏时甚至颗粒无收。为了更好地指导施肥,本文就云南水稻 Trace elements are chemical elements with low content in the soil. The content of these elements ranges from a few millionths to a few hundredths. Zinc is an essential trace element indispensable to plant growth. Zinc is closely related to auxin, nitrogen metabolism, organic acid metabolism and enzymatic reaction, and its content in plants is small but its role in life process It is very important. Like other nutrients, zinc is indispensable and can not be replaced. When the supply of zinc in the soil is insufficient, the symptoms of zinc deficiency in rice occur, the yield is reduced, the quality is reduced, and even the crop is scarce in a serious shortage. In order to better guide fertilization, this article on Yunnan rice