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在中厚层黑土上进行田间试验。结果表明，作物产量随施入磷肥剂量增加呈上升趋势，其当年利用率与剂量呈负相关。磷肥６年累加利用率为第一年的５～６倍。耕层土壤残留磷量随施用量的增加而提高，其速效磷占残效磷的％随施用量的增加而递减，而迟效磷占残效磷的％则相反。一次大剂量施入，可维持较持久的磷肥残效效应。
Field trials on medium black soil. The results showed that the crop yield increased with the increase of the amount of phosphate fertilizer applied, and the utilization rate in the current year was negatively correlated with the dosage. 6-year cumulative utilization of phosphate fertilizer in the first year of 5 to 6 times. The amount of residual phosphorus in topsoil increased with the increase of application rate, while the percentage of available phosphorus to residual phosphorus declined with the increase of application rate, while the percentage of available phosphorus to residual phosphorus was the opposite. A large dose applied to maintain a more lasting phosphate residual effect.