【摘要】 研究了不同种植密度和施氮量对杂交狼尾草的产量和品质的影响．结果表明，本地生态生产条件下，以种植密度７株／ｍ２，群体和个体生长最佳，产量最高；杂交狼尾草对氮肥要求大，在本试验施氮范围（４７０ｋｇ／ｈｍ２）内，产量随氮水平提高而增加．较高氮水平下，分蘖发生多而快叶面积指数大，干物质积累多；茎叶蛋白质含量在生育期间变化很大，刈割期迟，蛋白质含量明显下降．增加氮肥用量可明显改善鲜草品质．更多还原

【Abstract】 The effect of different planting density and nitrogen fertilizer on yield and quality of hybrid Pennsetum was studied.It was showed that the density of 7 plant/m 2 had the highest biomass yield.which was attributed to the better development of both plant individuals and population.Hybrid Pennsetum needs much nitrogen for its growth and its shoot yield increased with the N fertilizer level within the range of 470 kg/hm 2.Under higher level of N fertilizer,more tiller initiated and their growth was fast,thus there were larger LAI and much dry matter accumulation.Protein content in shoot changed significantly with growth.The shoot harvested late and become lower in protein content.N fertilizer could improve forage quality by increasing protein content in shoot.更多还原