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研究老芒麦与草原2号苜蓿在不同混播方式下种群的生长高度、茎/叶、叶面积指数及产草量的积累动态。结果表明:老芒麦和草原2号苜蓿高度的生长模式不受单播、混播的影响,其增长曲线为H=at2+bt+c;生物量积累动态模式符合幂函数W=cta。老芒麦与草原2号苜蓿组合以3∶1混播,种群的茎/叶较之其他几种播种方式下的种群茎/叶要小。单播草原2号苜蓿的叶面积指数最大,混播组合居中;单播老芒麦的叶面积指数最小。人工草地较天然群落有显著的增产作用。混播人工草地比单播人工草地又有明显的增产效应,其中老芒麦与草原2号苜蓿以3∶1的混播组合又比其他混播组合有很明显的增产现象。营养成分里的粗蛋白在单播草原2号苜蓿中的含量最高,在单播老芒麦中的含量最低。混播组合的粗蛋白质含量介于这二者之间。
The growth dynamics, stem / leaf area index and grass yield of Medicago sativa and Prairie No.2 alfalfa in different mixed-sowing ways were studied. The results showed that the growth pattern of the alfalfa was not affected by the unicast and mixed sowing, and the growth curve was H = at2 + bt + c. The dynamic model of biomass accumulation accorded with the power function W = cta. Sapwood and Prairie No.2 alfalfa combinations were mixed at a ratio of 3: 1, and the stems / leaves of the population were smaller than those of other sowing ways. The single leaf sowing alfalfa No.2 alfalfa leaf area index of the largest, mixed sowing center; the unilateral silage had the smallest leaf area index. Artificial grassland than the natural community significantly increased yield. Compared with the unicast artificial grassland, mixed artificial grassland had obvious yield increasing effect. Among them, the mixed sowing of 3: 1 and the mixed sowing of Soybeangrass and Prairie No.2 alfalfa significantly increased yield compared with other mixed sowing plots. Crude protein in nutrients was the highest in unicomponent prairie alfalfa 2 and the lowest in unicommon. Crude protein content of the mixed-crop combination is between the two.