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以施肥水平（肥力）、密度（保苗株数）耦合为中心，以春小麦中晚熟品种九三 ９１－Ｕ１２６为供 试材料，通过在旱作条件下试验，研究探讨了不同肥密条件下对吞小麦产量的影响。结果表明：① 试验条件下，５个因素影响产量的大小顺序为：氮肥（Ｘ２）磷肥（Ｘ３）密度（Ｘ１）钾肥（Ｘ４）微肥（Ｘ５）。 ②密度与施肥的互补作用中，表现极为显著，密度与施磷，施打，施氮耦合关系基本一致。图１，表 ２，参２。
Taking fertilizers (fertility) and density (number of seedlings per plant) as the center, the middle-late maturing cultivar Jiusan 91-U126 was used as experimental material to study the effects of swallowing wheat The impact of production. The results showed that: ① Under the experimental conditions, the order of the five factors affecting the yield was: nitrogen fertilizer (X2) phosphate fertilizer (X3) density (X1) potash fertilizer (X4) fertilizer (X5) (2) Among the complementary effects of density and fertilization, the performance was extremely significant. The coupling of density with phosphorus application, application and nitrogen application was basically the same. Figure 1, Table 2, reference 2.