不同行株距（密度）对小黑豆产量及其相关性状变异系数的影响

为了高效开发利用小黑豆资源，提高小黑豆产量，在山西隰县采用随机区组设计方法研究了不同行株距（密度）对小黑豆产量及相关性状变异系数的影响。结果表明：行距40 cm的平均产量优于行距60 cm的平均产量；不同行株距配置（密度）中，R40P30（8.34万株/hm2）处理的籽粒产量、单株籽粒产量、单株荚数和结荚高度4个性状均优于其他处理，R60P15（11.12万株/hm2）处理的百粒重性状优于其他处理，株高性状以R60P25（6.67万株/hm2）处理最高不，同行株距配置（密度）对有效分枝性状不存在影响；不同行株距配置（密度）处理对各性状的变异系数影响序列为产量>结荚高度>单株籽粒产量>百粒重>单株荚数>有效分枝>株高。该项研究为进一步提高小黑豆产量提供了理论和技术支撑。

Effect of Different Row and Plant Spacing (Density) on Coefficient of Variation of Grain Yield and Relative Characteristics of Small Black Soybean

In order to develop and use small black soybean resources, improving grain yield, we studied the effect of different row and plant spacing （density） on coefficient of variation of yield and relative characteristics of small black soybean with randomized block design in Xi County of Shanxi Province. The results showed that, the average grain yield of 40 cm row spacing was better than that of 60 cm row spacing, and in different row and plant spacing （density） patterns, the grain yield, grain yield per plant, pods number per plant and pod setting height with PuoP30 （plant number 8.34× 10 4/hm2） treatment were superior to those with the other mothers, 100-seed weight with R60P15 （plant number 11.12× 104/hm2） treatment was optimal, plant height with R60P25 （plant number 6.67~ 104/hm2） treatment was the most, and all treatments hadn＇t influence on effective branch character. The influence of different row and plant spacing patterns （density） on various characters coefficient of variation was grain yield 〉 pod setting height 〉 grain yield per plant 〉 100-seed weight 〉 pod number per plant 〉 effective branch 〉 plant height. Thus this research provided the theories and technical support for the further increase grain yield of small black soybean.