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缺磷是华北地区绝大多数土壤阻碍产量提高的因素之一,近些年来,这种现象越发明显.由于土壤含磷水平低,提高产量就必须补施大量磷肥,研究磷肥的经济合理施用、提高磷肥的利用率已是农业生产发展的迫切需要.
Phosphorus deficiency is one of the factors that hinder the yield increase of most of the soil in North China. In recent years, this phenomenon becomes more and more obvious. Due to the low level of phosphorus in the soil, a large amount of phosphate fertilizer must be replenished to increase the yield. Increasing the utilization of phosphate fertilizer is an urgent need for the development of agricultural production.