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2年田间试验结果表明：在半干早气候条件下，黄绵土单施磷肥增产效果显著，春小麦产量可提高44．6％；单施氮肥增产效果不显著，但氮、磷、钾配合施用，春小麦产量可增加55．4％；施磷或氮磷配合可显著地促进春小麦的生长发育，增加植株高度和叶面积系数，促进春小麦结实小穗发育，提高结实率；磷与钾配合施用可促进春小麦光合产物积累和运转；氮、磷配合施用，可显著改善春小麦品质，与不施肥处理相比，籽粒中氮磷钾含量分别提高18．5％、18．4％、8．1％．
The result of 2 years field trial showed that under the conditions of semi-dry and early climatic conditions, the yield increase of single phosphorus fertilizer was significant, the yield of spring wheat could be increased by 44.6%; The yield increase of single nitrogen fertilizer was insignificant, but the combination of nitrogen, phosphorus and potassium, The yield could be increased by 55.4%. Phosphorus or nitrogen and phosphorus could significantly promote the growth and development of spring wheat, increase the plant height and leaf area coefficient, promote the development of strong spikelet of spring wheat and increase the seed setting rate. The combination of phosphorus and potassium could promote spring wheat The photosynthate accumulation and operation could be significantly improved with the application of nitrogen and phosphorus, and the content of NPK in the grain increased by 18.5%, 18.4% and 8.1%, respectively.