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在半湿润易旱区的旱地条件下，应用１５Ｎ示踪法进行了冬小麦施肥与氮素吸收利用的研究。结果表明：增施氮肥和有机肥可显著增加小麦的吸氮量，但氮素化肥用量过多会影响小麦对土壤氮的吸收；有机肥与氮素化肥配合施用，能提高氮素化肥的利用率，减少化肥氮的损失率，改善氮素在植株体内的分配状况，较多地运往籽粒，有利于提高产量改善品质。文中还分析了亩产５００ｋｇ旱地小麦高产高效的施氮量。
Under the conditions of dry land in semi-humid and arid areas, 15N tracing method was used to study the fertilization and nitrogen uptake of winter wheat. The results showed that increasing nitrogen and organic fertilizer could significantly increase the nitrogen uptake of wheat, but too much nitrogen fertilizer would affect the wheat nitrogen uptake. Combined application of organic manure and nitrogen fertilizer could increase the utilization of nitrogen fertilizer Rate, reduce the loss rate of nitrogen fertilizer, improve the distribution of nitrogen in the plant body, more transported to the grain, help to improve yield and improve quality. The article also analyzed the yield per acre 500kg dry land high yield and efficiency of nitrogen fertilizer.