磷肥并非施用越多越好,因为当年施入的磷肥不能完全被作物吸收,会在土壤中累积,过量施用磷肥不仅无益,而且害处还多。合理施用磷肥,可增加作物产量,改善产品品质。如:在谷类作物中,可加速作物分蘖,促进幼穗分化、灌浆和籽粒饱满,促使早熟;在瓜类、茄果类蔬菜及果树等作物中,可促进花芽分化和开花结实,提高结果率;在栽种豆科绿肥时,可提高绿肥鲜草产量,使根瘤菌固氮量增多,达到“以磷增氮”的目 Phosphate fertilizer is not applied as much as possible, because when the phosphate fertilizer applied in the past can not be fully absorbed by the crop will accumulate in the soil, excessive application of phosphate fertilizer is not only useless, but also more harm. Rational application of phosphate fertilizer can increase crop yield and improve product quality. For example, in cereal crops, it accelerates crop tillering and promotes spike differentiation, filling and grain filling to promote precocity. In fruits such as melons, eggplant and fruit trees, flower bud differentiation and flowering and fruiting can be promoted and the result rate can be improved ; In the cultivation of leguminous manure, can increase the yield of fresh green manure so that increased rhizobia nitrogen fixation, to “increase by phosphorus”