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以“蒙农1号”红三叶为试材,对4种不同种植密度下单株分枝数、每枝花序数、每花序小花数、单株种子数、单株结实率、千粒质量及单株种子产量进行了测定,研究不同种植密度对种子产量及其构成因素的影响。结果表明:行株距60 cm×40 cm、60 cm×50cm、50 cm×40 cm、50 cm×50 cm 4个处理都对“蒙农1号”红三叶单株种子产量产生了影响,其中密度为50 cm×40 cm的单株种子产量最高,达到9.6 g,且显著高于其它3个种植密度处理(P<0.05),其它3个种植密度的单株种子产量没有显著性差异(P<0.05)。单株分枝数、单株种子数、千粒质量是“蒙农1号”红三叶种子产量的主要构成因子。不同种植密度主要对单株分枝数和单株种子数2个种子产量构成因子有调控作用,对千粒质量无影响。
Taking “Mengnong 1” red clover as test material, the number of branches per plant, the number of inflorescences per plant, the number of inflorescences per inflorescence, the number of single seed per plant, the seed setting rate per plant, Grain weight and single seed yield were measured to study the effects of different planting densities on seed yield and its components. The results showed that the four treatments of 60 cm × 40 cm, 60 cm × 50 cm, 50 cm × 40 cm, 50 cm × 50 cm all had effects on the seed yield per plant of “Mengnong 1” , And the seed yield of the single plant with the density of 50 cm × 40 cm was the highest, reaching 9.6 g, which was significantly higher than that of the other three planting density treatments (P <0.05). The seed yield of the other three planting density had no significant difference (P <0.05). The number of branches per plant, the number of seeds per plant and the quality of 1000 grains are the main components of the seed yield of “Mengnong 1” red clover. Different planting densities mainly controlled the compositional factors of single seed number and single seed number of two seeds, but had no effect on the quality of 1000 grain.