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种肥是用于拌种或移栽的局部施于种子或幼苗附近的肥料,它可以补充基肥的不足,供应作物生长期的养分,但有些化肥对种子或幼苗有毒害,不宜作种肥。不宜作种肥的肥料有三类:1.对种子有腐蚀作用的肥料:碳酸氢铵具有腐蚀性和挥发性,过磷酸钙含有游离态的磷酸,对种子发芽和幼苗生长会产生严重危害。如必须用作种肥,应避免与种子直接接触。可将碳酸氢铵施在播种沟之下或与种子相隔一定距离的土层,或将过磷酸钙与
Fertilizer is used for seed dressing or transplanting locally applied to seed or seedling near the fertilizer, which can supplement the lack of base fertilizer, supply crop growth period of nutrients, but some of the chemical fertilizer on seed or seedling poisoning, should not be used as fertilizer. There are three types of fertilizers that should not be used as seed fertilizers: 1. Fertilizers that have a corrosive effect on the seeds: ammonium bicarbonate is corrosive and volatile, and the superphosphate contains free phosphoric acid, which can cause serious damage to seed germination and seedling growth. If it must be used as seed fertilizer, avoid direct contact with the seed. Ammonium bicarbonate can be applied below the seeding ditch or at a distance from the soil, or by mixing the superphosphate with