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为了提高寒地半干旱地区糜子产量,采用裂区设计,密度为主区,设4个水平,45、52.5、60、67.5万株/hm2;施氮量(纯氮)为亚区,设5个水平,0、45、60、135、180kg/hm2,共20个处理,对糜子不同种植密度和施氮量对产量性状影响的研究,比较产量差异及叶绿素、叶面积、土壤碱基氮的变化特征。结果表明:密度在60万株/hm2,施氮量在60kg/hm2策略下,既能获得较高产量又能获得较高的经济效益。为了获得较高的产量,在低密度条件下,应适当增加施氮量,增加养分,促进分蘖,随着密度的增加,应适当减少施氮量,控制分蘖,使糜子收获时的密度达到或接近62万株/hm2～69万株/hm2这一范围内最适密度。
In order to improve the yield of the millet in cold and semi-arid areas, the design of the split zone was adopted and the density was the main area with 4 levels of 45,52.5,60,67.5 plants / hm2. The nitrogen application rate (pure nitrogen) 0, 45, 60, 135, 180 kg / hm2, a total of 20 treatments, the different planting density and nitrogen application rate on the yield traits of the millet studied the yield differences and chlorophyll, leaf area, soil nitrogen Change characteristics. The results showed that with the density of 600 000 plants / hm2 and the nitrogen application rate of 60 kg / hm2, both high yield and high economic benefit could be obtained. In order to obtain higher yield, under low-density conditions, the amount of nitrogen applied should be increased appropriately to increase the nutrients and promote the tillering. With the increase of the density, the amount of nitrogen fertilizer should be reduced, the tillering should be controlled properly, and the density of the millet should reach or Close to 620000 / hm2 ~ 690000 plants / hm2 the most appropriate density within this range.