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文章采用“3414”试验设计在位于渭北旱塬的彬县进行了冬小麦氮磷钾三要素用量的田间试验,旨在为确定合理的冬小麦施肥量提供实践依据。结果表明:该地区土壤碱解氮、速效磷含量水平中等,速效钾含量水平较高,但土壤总体养分含量水平低,土壤基础地力冬小麦产量仅为4 750kg/hm~2;根据肥料效应函数法得渭北旱塬冬小麦N、P_2O_5、K_2O的最佳经济施肥量分别为263.9 kg/hm~2、84.7kg/hm~2、55.3kg/hm~2,其最佳经济产量为7 261kg/hm~2,相比空白处理增产幅度达52.9%。由此可见,通过合理施肥提高渭北旱塬土壤肥力与冬小麦产量仍有较大潜力。
In this paper, a field experiment was conducted using the “3414” design in Binxian, a plateau of Weibei, in order to provide a practical basis for determining the appropriate amount of winter wheat fertilization. The results showed that there was a moderate level of available phosphorus and available potassium in soils, but the total soil nutrient level was low and the yield of winter wheat was only 4750kg / hm ^ 2. According to the fertilizer effect function method The best economic fertilization amount of N, P_2O_5 and K_2O of winter wheat in Weibei dryland were 263.9 kg / hm ~ 2 and 84.7kg / hm ~ 2,55.3kg / hm ~ 2 respectively, and the best economic yield was 7 261 kg / hm ~ 2, compared with blank processing yield increased by 52.9%. Thus, there is still a great potential for increasing soil fertility and winter wheat yield in Weibei arid highland through rational fertilization.