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利用田间试验方法，研究了不同水肥条件对冬小麦主要经济性状的影响．结果表明，限制黄土高原沟壑区冬小麦生产的最主要因素是肥而不是水．在任何灌水条件下，施肥对冬小麦的经济性状都有明显的正效应；而只有在施肥的条件下，灌水才有正效应；否则，灌水反而有负作用．
Field experiments were conducted to study the effects of different water and fertilizer conditions on the main economic traits of winter wheat. The results showed that the main factor limiting winter wheat production in the gully area of the Loess Plateau was fertilizer rather than water. Under any irrigation conditions, fertilization had a significant positive effect on the economic traits of winter wheat. However, irrigation had a positive effect only under fertilization conditions; otherwise, irrigation had a negative effect.