种植密度对青贮玉米品种产量及相关性状的影响

以6个青贮玉米品种为试验材料,研究了3种种植密度对青贮玉米生物产量、干物质产量及相关性状的影响。结果表明,不同品种之间生物产量和干物质产量差异极显著;不同密度下品种的生物产量和干物质产量差异极显著;品种与密度互作之间生物产量和干物质产量差异分别为显著和极显著。龙育1号、高油169和高油115作为优质青贮高油玉米在黑龙江省适宜种植密度分别为7.0～8.0万株/hm2、7.0万株/hm2和6.0万株/hm2;黑饲1号在6万株/hm2时产量较高;龙辐208在7万株/hm2种植条件下,其生物产量和干物质产量均较高,尤其干物质产量最高;青贮玉米品种的青贮生育日数、株高、穗位、茎粗、收获期绿叶片数差异不大,品种之间差异主要由品种自身特性决定。中原单32可作为粒用玉米种植推广。

Effect of Planting Density on Biomass and Dry Matter Yield of Silage Maize Cultivars

We designed three kinds of planting density and studied their effect on biomass,dry matter yield of six silage maize cultivars.The results indicated that there was ultra-significant difference in biomass and dry matter yield between different cultivars or different planting density.Under the condition of interaction between cultivars and planting densities,the difference in biomass and dry matter yield was respectively significant and ultra-significant.The planting density of Longyu 1,Gaoyou 169 and Gaoyou 115 respectively achieved(70-80) thousand plants per ha,70 thousand plants per ha and 60 thousand plants per ha,which should be extended as high-quality and high-oil silage maize cultivars in Heilongjiang province.When at the density of 60 thousand plants per ha,the yield of Heisi 1 is higher,while at the density of 70 thousand plants per ha the biomass and dry matter yield of Longfu 208 were both higher,especially the dry matter yield which was the highest of all.Zhongyuandan 32 should be used as grain maize.