种植密度对不同类型青贮玉米品种产量及相关性状的影响

Effect of Planting Density on Yield and Related Traits of Different Types Silage Maize Cultivars

以3个青贮玉米品种龙育6号、高油115和中原单32为试验材料,研究了5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:青贮玉米株高和穗位高随密度的增大而增高,绿叶片数随密度增大而减少,但差异不显著;随密度的增大,田间倒伏(折)逐渐严重,生育日数略微延迟。不同品种之间倒折有差异。不同类型青贮玉米品种生物产量和干物质产量差异显著,专用型青贮品种龙育6号显著高于高油青贮玉米品种高油115和粮饲兼用型品种中原单32;密度对青贮玉米产量的影响因品种而异,龙育6号在7.0万株.hm-2时群体产量和干物质产量最高,与其它处理差异达显著水平,高油115和中原单32在6.0万株.hm-2时群体产量和干物质产量最高。

Taking three silage maize cultivars of Longyu No.6,Gaoyou 115 and Zhongyuandan 32 as experimental materials,the effect of 5 different planting densities on biomass,dry matter weight and related traits was studied.The results indicated thatthe height of plant and position of silage maize increased with the increasing of planting density,on the other hand,the amount of green leaves were decreased with the increasing of plant density but the difference were not significant;The lodging of maize under heavy density was serious and number of growing days were late,the lodging of different varieties were different.The biomass and dry matter weight among different types of silage maize had significant differences.Longyu No.6（only for silage） was higher than Gaoyou 115（high soil content） and Zhongyuandan 32（it can be used as crop or forage）.The effect of planting density on yield was different for different cultivars.The highest yield of Longyu No.6 was under the density of 70 000 plants per hectare and Gaoyou 115 and Zhongyuandan 32 were under the density of 60 000 plants per hectare.