不同种植行距与种植密度对黍子生长特性及子实产量的影响

Effects of Different Row Spacing and Planting Density on the Growth Characteristics and Yield of Millet

为了发掘晋北地区黍子生产潜力,在晋北干旱半干旱生态条件下,研究了不同种植行距(行距25、30、35cm)和不同种植密度(50万、75万、105万、135万、150万株/hm^2)组合处理对黍子产量和生长的影响。结果表明:在15组处理中,A_2B_3处理的产量构成因素值均最高,与其他处理间差异明显;黍子各个生长时期群体叶面积指数也以A_2B_3处理组合最高,成熟期A_2B_3处理叶面积指数虽较抽穗期有所降低,但在各处理组合中仍为最高值;成熟期A_3B_2和A_3B_3处理干物质积累总量表现相对较高,分别为13.17和13.18g。通过灰色关联度综合分析,A_2B_3(行距30cm,密度105万株/hm2)、A3B3(行距35cm,密度105万株/hm2)、A2B2(行距30cm,密度75万株/hm^2)3个处理组合最适宜在晋北地区推广。

To explore and develop the production potential of broomcorn millet in the arid and semi-arid region of northern Shanxi Province, different planting density and row spacing treatment combinations of broomcorn millet were plotted out to study the effects on millet yield and quality. The results showed that the yield components of the A2B3 treatment were significantly higher than the those of other treatments. At mature stage the leaf area index value of the A2B3 treatment was lower than that in the heading stage, but it was still higher than rest of the other treatments. At the mature stage, the total amount of dry matter accumulation in A3B2 and A3 B3 was relatively high, 13.17 g and 13.18 g respectively. Comprehensive grey correlation analysis results showed that A2B3（30 cm row spacing, density of 1.05 million plants/hm^2）, A3B3（35 cm row spacing, density of 1.05 million plants/hm^2）, A2B2（30 cm row spacing, density of 750 000 plants/hm^2） treatment combination were suitable to be used in north region of Shanxi Province.