西藏拉萨地区不同施氮量对鸭茅产量的影响  

Influence of Different Nitrogen Fertilization on Orchardgrass Yield in the Lhasa Area of Tibet

作　　者：张小甫[1,2] 李锦华[1] 田福平[1,2] 余成群[3] 黄秀霞[4] 江措 

机构地区：[1]中国农业科学院兰州畜牧与兽药研究所,兰州730050 [2]农业部兰州黄土高原生态环境重点野外科学观测试验站,兰州730050 [3]中国科学院地理科学与资源研究所,北京100101 [4]西藏自治区农业技术推广服务中心,拉萨850000

出　　处：《西北农业学报》2011年第7期192-195,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家科技支撑计划子课题“优质牧草繁育研究与示范”(2007BAD80B01-01)

摘　　要：在西藏拉萨地区进行不同施氮量（尿素）对鸭茅产量的影响研究。结果表明,鲜（干）草产量、种子产量、植株生长速度随施氮量的增加而明显提高,但当施氮达到一定量时,其产量不再提高,反而呈下降趋势。7个处理的鲜（干）草产量均显著高于对照,尿素施量160~240 kg/hm2的鲜（干）草产量保持在较高水平,施量160 kg/hm2的鲜（干）草产量最高;施尿素的鸭茅种子产量与未施者差异显著,施量160~280 kg/hm2的鸭茅种子产量较高;施量120~200 kg/hm2的鸭茅生长速度明显高于其他施肥水平;对于牧草高效生产的经济效益而言,尿素施量为160 kg/hm2的处理能够获得最大经济效益。The impact of different urea on orchardgrass production was studied in the Lhasa area of Tibet.The results showed that the fresh yield,hay yield,seeds yield and plant growth rate among {7 urea} treatments were significant higher than the control.The fresh yields and hay yields of urea treatments（160 kg/hm2,200 kg/hm2,240 kg/hm2） were significant higher than others treatments;The yields in the treatment of urea（160 kg/hm2） was the highest;The seeds yields of urea treatments（160 kg/hm2,200 kg/hm2,240 kg/hm2） were significant different;The plant growth rate of urea treatments（120 kg/hm2,160 kg/hm2,200 kg/hm2） were significant higher than others treatments;And the economic fertilization formula was 160 kg/hm2 of urea.

关 键 词：尿素 鸭茅 鲜(干)草产量 种子产量 

分 类 号：S543.3[农业科学—作物学]