研究不同种植密度和施氮水平对雅玉8号产量及品质的影响。结果表明,雅玉8号在四川资阳地区适宜种植密度为90 000株/ hm²,最佳施氮量为200 kg/hm²,其地上干物质产量高达23 345 kg/hm²,果穗率为59.93%,粗蛋白含量为75.5 g/kg,粗纤维仅为124 g/kg,粗脂肪、粗灰分、无氮浸出物和钙含量分别为34.6、62.0、598和4.0 g/kg。种植密度和施氮水平对青贮玉米的地上干物质含量、粗蛋白产量及果穗率和粗纤维含量的影响均呈显著水平。

Effects of the planting density and nitrogenous fertilizer supply level on the biomass and quality of the Yayu No.8 were studied. The results indicated that the best proper planting density and nitrogenous fertilizer supply level were 90 000 plants/ha and 200 kg/ha, respectively. The dry matter yield was 23 345 kg/ha, fruit yield was 59.93%, the content of crude protein was 7.55%, but the crude fiber was only 12.4%, while the crude fat, crude ash, nitrogen-free extract and the calcium content were 3.46%, 6.20%, 59.8% and 0.40%, respectively. The effects of the growing density and nitrogenous fertilizer quantity on the dry matter yield, yield of crude protein, fruit yield and the crude fiber content of Yayu No.8 were significant difference.

国家科技支撑计划(2011BAD17B03)、国家牧草产业技术体系项目(CARS-35)、省财政基因工程项目(2011JYGC-09-026)