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１９９６～１９９７年在豫西褐土区进行了氮钾肥不同用量试验，探讨了高产条件下小麦的吸肥规律和施肥的增产效应。结果表明，小麦吸收养分的数量，在一定范围内与施肥量呈显著的正相关；吸收养分的高峰期是拔节期至抽穗期，一生吸收氮、磷、钾养分的数量分别为２１５．４，６９．４和２１８．０ｋｇ·ｈｍ－２，三者之比为３．１０∶１∶３．１４．氮钾肥的产量模型为：Ｙ＝３５９８．６９５０＋１６．６０５７Ｘ１＋１３．５４４９Ｘ２－０．０３７１Ｘ２１－０．０５４８Ｘ２２＋０．００６９Ｘ１Ｘ２，经济最佳施肥量为Ｎ２１４．８ｋｇ·ｈｍ－２，Ｋ２Ｏ１２６．５ｋｇ·ｈｍ－２，氮钾比为１．６９∶１，平均增产１１．８％．
In 1996 ~ 1997 in the cinnamon soil in Henan Province were carried out a different amount of nitrogen and potassium fertilizer experiments to explore the high yielding conditions of wheat absorption and fertilization yield-increasing effect. The results showed that the amount of nutrients absorbed by wheat was significantly and positively correlated with the amount of fertilization within a certain range. The peak of nutrient uptake was from jointing stage to heading stage. The amount of nitrogen, phosphorus and potassium nutrients absorbed during the whole life were 215.4, 69.4 and 218.0 kg · hm-2, the ratio of the three is 3.10:1:3.14. The yield models of nitrogen and potassium fertilizers were: Y = 3598.6950 + 16.6057X1 + 13.5449X2-0.0371X21-0.0548X22 + 0.0069X1X2, and the best economic manure was N214.8kg · hm-2, K2O126.5kg · hm-2, nitrogen Potassium ratio of 1.69: 1, an average yield of 11.8%.