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杂交玉米制种中不同氮、钾用量对产量效应的研究结果显示出，在高海拔（1350m）低气温（13．9℃）地区不等黄壤土中，以适量的氮（25kg／亩）和较高水平的钾（10kg／亩），制种产量达到最高，投入产出比也相应高，有利于提高效益。
Results of different nitrogen and potassium dosages on the yield of hybrid maize showed that with the suitable amount of nitrogen (25kg / acre) and the moderate amount of nitrogen (25kg / mu) in the range of high altitude (1350m) Higher levels of potassium (10kg / acre), seed production reached the highest, the input-output ratio is also high, is conducive to improving efficiency.