种植密度对杂交甜高粱“甜格雷兹”生长、品质及产量的影响

Effect of sowing density on growth, quality and yield of Sorghum bicolour Sugargraze

在内蒙古西辽河平原研究了不同种植密度对杂交甜高粱“甜格雷兹”生长、品质及产量的影响。结果表明,不同种植密度下单株分蘖数在生育前期消长明显,株高、茎叶比、LAI、光合色素含量和单株干物质积累在后期均呈显著差异;且品质和产量受种植密度影响较大,处理间的鲜、干草产量均显著增加(P<0.05)。综合分析,种植密度为20.00万株/hm2,可较好地协调群体与个体的生长,使鲜、干草和粗蛋白质都达到较高的产量。

Effects of sowing density on growth, quality and yield of Sorghum bicolour Sugargraze was tested in the plain of the West- Liao River in Inner Mongolia in 2004. The results showed that the tillers of plant changed obviously in the early growth stage, the ratio of stalk to leaf （SLR）, LAI, photosynthesis pigment content and dry weight per plant show significant difference in the growth stage under different sowing date, and while sowing densities had the great effects on quality and yield as well. General analysis showed that sowing density 200,000 plant/hm^2 was better not only for growth but also for crude protein content.