近年来随着氮、磷、钾施用量的增加,使土壤有效锌含量日益贫缺,很多地区不断出现缺锌缩苗、僵苗现象,受害面积不断扩大,程度逐渐加重,轻者生长停滞,重则死苗。盘锦、营口、沈阳等地每年约有数十万亩,甚至百万亩以上的水田发生不同程度的缺锌缩苗,一般减产8～30％。 In recent years, along with the increase of nitrogen, phosphorus and potassium application, the effective zinc content of the soil becomes increasingly scarce, zinc deficiency and seedling phenomenon are constantly emerging in many areas, the victim area is expanding, the degree is getting worse, the growth of light is stagnant, Heavy dead seedlings. Panjin, Yingkou, Shenyang and other places each year about hundreds of thousands of acres, or even more than one million mu of paddy fields in varying degrees of Zinc deficiency seedlings, the general reduction of 8 to 30%.