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在渭北旱原澄城县以冬小麦为供试作物，在不同底肥、底墒条件下进行不同生育期灌水和追肥，以研究水肥配合的增产作用。结果表明，只有在适宜的底肥用量和底墒配合下，才能充分发挥水肥的增产作用；在施用适量底肥后，生育期灌水或追肥都能提高作物产量，并且以早为宜，高底墒时效果更佳；生育期水肥配合大都能提高作物产量，但增产效果不及单独灌水或单独追肥效果明显。试验条件下，播前灌水不及生育期灌水效率高，水肥之间没有明显的交互作用效应。
In Chengbei County of Weibei arid plain with winter wheat as the test crop, under different substrate and soil moisture conditions under different growth periods of irrigation and top dressing to study the yield-increasing effect of water and fertilizer. The results showed that only with the appropriate amount of base fertilizer and soil moisture with the cooperation, in order to give full play to the role of water and fertilizer production; application of adequate amount of base fertilizer, the growth period of irrigation or top dressing can increase crop yield, and early appropriate, Good; most of the water and fertilizer fertilization during the growth period can improve crop yield, but the effect of increasing yield is not as effective as irrigation alone or dressing alone. Under the experimental conditions, the irrigation efficiency before sowing was lower than that during growing period, and there was no obvious interaction effect between water and fertilizer.