近年来,随着农业生产的发展和作物单产的提高,农田化学磷肥的投放量不断增加,因此土壤中有效磷含量也相应发生变化。众所周知,世界磷资源的贮量是有限的,迄今还没有一种物质可代替农业系统中的磷。因此,如何采取有效的磷管理措施,合理经济施用磷肥, In recent years, with the development of agricultural production and crop yields increased, the amount of chemical phosphorus fertilizer in farmland increased, so the available phosphorus content in the soil also changed accordingly. As we all know, the world’s reserves of phosphorus resources are limited, so far there is no substance to replace the phosphorus in agricultural systems. Therefore, how to take effective phosphorus management measures, rational and economical use of phosphate fertilizer,