由于农家肥料施用一年比一年减少,致使地力衰退,土壤中有机质含量不足;加上过量施用氮磷化肥,导致黄淮流域石灰性土壤中缺锌日益严重。锌属微量营养元素,小麦生长期所需虽少,但缺少了又不行。小麦缺锌,植株 Due to the decrease of peasant fertilizer application year by year, soil fertility decline and the content of organic matter in the soil is insufficient. With the excessive application of nitrogen and phosphorus fertilizer, the zinc deficiency in calcareous soil of the Huang-Huai Valley is increasingly serious. Zinc is a micronutrient, wheat growth period needed less, but the lack of it will not work. Wheat zinc deficiency, plants