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春小麦是宁夏半干旱区的主要粮食作物，增施肥料和合理密植是提高春小麦产量的主要因素。该项研究是为了探索合理施肥量和种植密度，试验结果表明：合理密植和施肥可有效地达到2250kg／hm产量水平，需施N90kg／hm，P2O5135kg／hm，密度500粒／m；合理施肥可改善作物性状；施肥对根系的影响主要以耕层0～20cm最大；施肥与水分利用效率是正相关，r为0．894**，而密度与水分利用是显著负相关，r为-0．326．
Spring wheat is the main food crop in the semi-arid area of Ningxia. Adding fertilizers and close planting is the main factor to increase the yield of spring wheat. The study was conducted to explore the reasonable fertilization rate and planting density. The results showed that reasonable density planting and fertilization could effectively reach the level of 2250kg / hm, with N90kg / hm, P2O5135kg / hm and density of 500 grains / m; The main effect of fertilization on the root system is that the topsoil is 0-20 cm. The fertilization and water use efficiency are positively correlated, r is 0.894 **, and the density is negatively correlated with water use, r is -0.326 .