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磷对提高作物的抗旱性及增产有突出的作用。应用磷酸吸收系数法估算宁南旱地主要土壤类型的磷肥用量。结果表明：宁南旱地主要土壤类型的磷酸吸收系数介于７２５—１３０６ｍｇ／１００９上之间，相应的建议施磷量为５３—１０８．９ｋｇ／ｈａ，与肥效函数法计算出的施磷量十分接近。
Phosphorus plays a prominent role in improving crop drought resistance and yield increase. Phosphate Absorption Coefficient Method for Estimating the Amount of Phosphate Fertilizer Applied to Main Soil Types in Dryland in South Ningxia. The results showed that the phosphoric acid absorption coefficient of major soil types in dryland of south Ningxia was between 725-1306mg / 1009, and the corresponding recommended phosphorus content was 53-108.9kg / ha. Close to