近年来,由于耕地农家肥施用量减少,氮、磷化肥增加,土壤中的钾素及一些微量元素没有得到及时补充,使土壤养分失调,从而导致作物缺素症连年发生。今午我县有21个乡镇的10万亩玉米、大豆、花生田间不同程度地发生缺素症。沿大、小凌河两岸的碳酸盐土壤、盐渍化土壤、沙质土壤更为严重。 In recent years, due to the reduction of manure application in cultivated land and the increase of nitrogen and phosphorus fertilizers, the potassium and some trace elements in the soil have not been replenished in time, which leads to the imbalance of soil nutrients, resulting in the successive occurrence of crop-deficiency. This afternoon, 21 counties in our county 10 million mu of corn, soybeans, peanuts field to varying degrees, the occurrence of deficiency. Carbonate, salinized and sandy soil along the major and Xiaolinghe banks is more serious.