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磷矿粉与硝酸或硫酸团体解磷剂干法一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，小麦对其磷素的利用和肥效，并与普通过磷酸钙、磷矿粉做了比较。结果表明，硝脲磷、硫脲膦两种复合肥对小麦全磷和干重的影响，与普钙——氮肥（以等量N、P计算）相当或略高，但小麦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。硝胀磷、硫脲磷使小麦植株全磷、干重增加的原因，可能是促进了土壤中难溶性磷的转化。
Phosphorite powder and nitric acid or sulfuric acid group of phosphate solution dry process made of two nitrogen and phosphorus containing compound fertilizer - nitrate urea, thiourea and phosphorus. Tracer method was used to study the phosphorus utilization and fertilizer efficiency of the two kinds of phosphate and compound fertilizers applied to three different types of soils. The results were compared with those of common superphosphate and phosphate rock. The results showed that the effects of three kinds of compound fertilizers, ie, urea-urea and thiourea-phosphorus, on total phosphorus and dry weight of wheat were comparable to or slightly higher than that of general-calcium-nitrogen fertilizers (calculated by equivalent N and P) Phosphorus from these two kinds of compound fertilizer is lower than that of general calcium treatment, fertilizer utilization is also lower than that of general calcium. Nitrifying phosphorus, thiourea and phosphorus make wheat plant total phosphorus, dry weight increase may be due to promote the transformation of soil insoluble phosphorus.