密度对矮杆早熟新品种‘吉杂141’高粱的产量及产量性状的影响

合理的种植密度有利于提高高粱的生产潜力。本试验为了阐明矮秆早熟高粱品种‘吉杂141’在佳木斯地区的合理播种密度，在大田试验条件下，设置了15万、20万、25万、30万、35万株/hm24种播种密度，研究不同密度对产量及产量性状的影响。结果表明：随着种植密度的增大，叶面积指数增加，叶绿素含量下降，株高差异不显著，穗长、穗粗逐渐下降，生物产量随着密度的增加而增加，千粒重和单穗重对产量影响最大，二者与产量均呈正相关关系。在佳木斯地区，‘吉杂141’最适播种密度为20万株/hm2，产量可达到9183.00 kg/hm2。为该品种在本地的推广和应用提供了理论依据和技术支撑。

Effects of Planting Densities on Yield and Agronomic Characters of New Early Maturing Short-stalked Sorghum Variety‘Jiza141’

The suitable planting density was favorable for sorghum yield increase. In order to clarify the suitable planting density of dwarf-stem, early-maturing sorghum variety‘Jiza141’, in the open field condition, 150000, 200000, 250000, 300000 and 350000 plants/hm2 tests were set to study the effect of different densities on yield and yield traits. The results showed that with the increase of planting density, LAI increased, chlorophyll content decreased, plant length had no significant difference, era length and era diameter tended to decrease, while biomass increased with the increase of density. The 1000-grain weight and single panicle weight had the maximum effects on yield, and both of them showed a significantly positive correlation with the yield. In Jiamusi growing areas, the optimal plant density for brew sorghum‘Jiza141’was 200000 plants/hm2, and the yield could reach 9183.00 kg/hm2. The study provides a theoretical basis and technical support for the‘Jiza141’variety in the Jiamusi ecological region.