种植密度对青贮高油玉米品种产量及相关性状的影响

以3个青贮高油玉米品种为试验材料,研究了3种种植密度对青贮高油玉米生物产量、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差异显著;龙育1号、高油169和高油115分别在7.0万株·hm-2～8.0万株·hm-2、7.0万株·hm-2和6.0万株·hm-2下作为优质青贮高油玉米可在黑龙江省种植推广,青贮高油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.

Effect of Planting Density on Yield and Related Traits of Silage-High Oil Maize Cultivars

Effects of three kinds of planting density on biomass,dry matter yield and related traits of three silage-high oil maize cultivars were studied.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 significant and ultra-significant,respectively.The planting density of Longyu 1,Gaoyou 169 and Gaoyou 115 achieved 70 thousand plants to 80 thousand plants per hm2,70 thousand plants per hm2 and 60 thousand plants per hm2,respectively,which should be extended as high-quality high-oil silage maize cultivars in Heilongjiang province.There were little difference in growth period,plant height,ear site,stem diameter and green-leaf number at harvesting time between different silage-high oil maize cultivars.The differences between cultivars were mainly decided by their own characteristics.