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研究得出,武威平川灌区玉米亩产≥750公斤的密度范围为5845～6712株/亩;施纯氮21.68～26.30公斤/亩;施五氧化二磷10.52～12.90公斤/亩。最佳效益的优化组合为:(1)亩产750公斤玉米的密度5942株/亩;施纯氮14.14公斤/亩;施五氧化二磷7.42公斤/亩。(2)亩产830公斤玉米的密度6737株/亩;施纯氮18.21公斤/亩;施五氧化二磷10.26公斤/亩。通过生产示范,证明结果可靠,并对武威平川灌区具有一定的代表性。
The results showed that the density of per acre≥750kg in Wuwei Pingchuan irrigation area was 5845 ~ 6712 plants / mu; the pure nitrogen was 21.68 ~ 26.30 kg / mu; the phosphorus pentoxide was 10.52 ~ 12.90 kg / mu. The optimal combination of optimal benefits is as follows: (1) The density of 750 kg of corn per mu is 5942 plants / mu; the nitrogen of pure nitrogen is 14.14 kg / mu; and the phosphorus pentoxide is 7.42 kg / mu. (2) The density of 830 kilograms of corn is 6737 plants / mu; the nitrogen of pure nitrogen is 18.21 kg / mu; the phosphorus pentoxide is 10.26 kg / mu. Through the demonstration of production, the result is reliable and has some representativeness to Wuchuan Pingchuan Irrigation District.