问:用化肥做种肥,有时会发生庄稼不出苗、烧籽、烧根、烧苗现象。请问这是为什么?怎样才能避免?(陕西岐山安乐公社蔡良)答:你说的这种情况,叫做肥害,是化肥施用不当,用量过大引起的。化肥都是无机盐类,用量过大,增加了土壤中溶液的浓度,庄稼不但 Q: fertilizer to do with fertilizer, sometimes crops will not emerge, burning seeds, burning roots, burning seedlings phenomenon. What is this? Why can we avoid it? (Cai Liang of Shaanxi Qishan Anle Commune) Answer: You said this kind of situation, called fertilizer damage, is caused by improper application of chemical fertilizers and excessive dosage. Fertilizers are inorganic salts, the amount is too large, increasing the concentration of the solution in the soil, crops not only