磷矿粉与硝酸或硫酸固体解磷剂干法１次加工制成两种含氮磷复合肥———硝脲磷、硫脲磷。用示踪法研究了这两种磷复肥在３种不同类型土壤上施用时水稻对其磷素的利用。研究结果表明，硝脲磷、硫脲磷两种复合肥对水稻全磷和结实的影响与普钙氮肥（以等效氮、磷计算）相当或略高，尤以硝脲磷增产效果明显，但水稻植株全磷中来自这两种复合肥的磷量低于普钙处理，肥料利用率也低于普钙。硝脲磷、硫脲磷使水稻植株全磷和产量增加的原因，可能是促进了土壤中难溶性磷的转化。 Phosphorite powder and nitric acid or sulfuric acid solid phosphate solution dry processing of one made two kinds of nitrogen and phosphorus containing compound fertilizer - urea urea phosphorus, thiourea phosphorus. The tracing method was used to study the phosphorus utilization of rice in three different types of soils. The results showed that the effect of compound fertilizer of urea-urea-phosphorus and thiourea-phosphorus on total phosphorus and firmness of rice was equivalent to or slightly higher than that of general-calcium-nitrogen fertilizer (calculated as equivalent nitrogen and phosphorus), especially the effect of increasing yield of nitrate- , But the phosphorus content of these two kinds of compound fertilizers in plant P of rice was lower than that of general calcium treatment and the fertilizer utilization rate was also lower than that of general calcium. The reasons for the increase of total phosphorus and yield of rice plants with the addition of urea urea and thiourea may be due to the promotion of the transformation of insoluble phosphorus in the soil.