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采用五元二次正交回归旋转设计试验,对黄土高原旱地小麦进行了多因素多指标的定量化综合研究.以二年田间试验的数据结果为依据,应用微机建立数学模型,解析各因素作用的量化强度,并选出生产上成套的高产组合方案.研究表明,在旱地小麦生产中,不仅要重视氮磷肥和有机肥的配合,还应讲究其量比的协调.正常年份下氮肥增产的潜力较大,应稳住磷肥增施氮肥;干旱年份氮肥用量过高明显造成减产,应稳住氮肥增施磷肥.以播期播量调节群体,以有机无机互调肥效,提高水份利用率是当前旱地小麦生产的可行途径.
Based on the data of two years of field experiments, a mathematical model was established by computer to analyze the effect of each factor on the dryland wheat in the Loess Plateau. , And selected a set of high-yielding combination plan in production.The research shows that in the dryland wheat production, not only should pay attention to the coordination of nitrogen, phosphorus and organic fertilizer, but also should pay attention to its quantity ratio of coordination.Nitrogen fertilizer production in normal years Potential should be greater, nitrogen fertilizer should be stabilized phosphorus; drought year excessive nitrogen fertilizer significantly reduce production, nitrogen fertilizer should be stabilized by increasing phosphate fertilizer. Sowing sowing adjustment groups, organic and inorganic intermodulation fertilizer efficiency, improve water use efficiency It is a feasible way to produce wheat in dry land at present.