土壤中的磷一般不能满足作物需要,必须通过施肥来补充。但磷肥有它的怪脾气,顺着它的脾气施才灵。早施:农作物的苗期吸收磷最快,要占生长期吸收总磷量的一半。若苗期缺磷,影响后期生长。即使后期再补施,也很难挽回苗期缺磷的损失,故苗期不能缺磷。细施:过磷酸钙在贮存时易吸潮结块,在施用时,要打碎过筛,以利根系吸收。集中施:磷容易被土壤中的铁、铝、钙固定而失效,故应穴施、条施,使磷固定在种子和根系的周围,既可减少与周围土壤的固定,又有利于根系吸收。与有机肥混合施:磷肥,特别是钙镁磷肥与有 Phosphorus in the soil generally does not meet crop needs and must be supplemented by fertilization. However, phosphate fertilizer has its own temper, along its temper Shi talent. As early as: the crop seedlings absorb phosphorus fastest, accounting for half of the total amount of phosphorus absorbed during the growing season. If the seedling lack of phosphorus, affecting the late growth. Even if the late replenishment, it is difficult to restore the loss of phosphorus in seedling stage, it can not lack phosphorus seedling stage. Smectite: SSP tends to be hygroscopic and agglomerated when stored. When applied, it should be shattered and sifted to facilitate root absorption. Concentrated facilities: phosphorus is easily fixed in the soil by iron, aluminum, calcium and failure, it should be applied to the hole, the provision of phosphorus around the roots and roots, both to reduce the fixed with the surrounding soil, but also conducive to root absorption . Mixed with organic fertilizer: phosphate, especially with magnesium and magnesium phosphate