施用氮肥对人工羊草草地产量及养分吸收的影响  

Effects of Nitrogen Fertilizer on the Yield and Nutrition Absorption of Artificial Leymus chinensis Grassland

作　　者：苏富源 郝明德[1,2] 郭慧慧[1] 蒙静[3] 肖庆红 武东波[3] 刘公社[4] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]西北农林科技大学水土保持研究所,陕西杨凌712100 [3]宁夏农业综合开发办公室,宁夏银川750011 [4]中国科学院植物研究所北方资源植物重点实验室,北京100093

出　　处：《草地学报》2015年第4期893-896,共4页Acta Agrestia Sinica

基　　金：国家科技支撑计划重大项目(2011BAD31B01);宁夏农业综合开发土地治理科技推广项目(NTKJ-2014)资助

摘　　要：为研究施氮对人工羊草草地产量及养分吸收的影响.以中科2号羊草(Leyrnus chinensis‘ghongke No.2')为材料,设置5个氮肥处理水平,测定不同生育期羊草氮、磷、钾养分含量以及干草产量。结果表明:施用氮肥可以显著提高羊草产量,施用量以133.8 kg·hm^(-2)最为适宜,羊草产量为13134.7 kg·hm^(-2),每千克纯氮增产55.5 kg;施用氮肥可以提高羊草氮、磷、钾吸收量。The purpose of this project was to study the effects of nitrogen fertilizer on the dry grass yield and nutrition absorption of artificial Leymus chinensis grassland and provide the basis for the resonble application of nitrigen fertilizer.Leymus chinensis＇ Zhongke No.2＇ was used as test material and five nitrogen fertilizer levels were set up.The contents of N,P_2O_5,K_2O at different growth stages were analyzed.Dry grass yield of Leymus chinensis＇ Zhongke No.2＇ was also measured.The results showed that nitrogen fertilizer could significantly increase the dry grass yield of Leymus chinensis.The nitrogen fertilizer level of133.8 kg·hm^（-2） was the optimum to the dry grass yield that was 13134.7 kg·hm^（-2）.The dry grass yield was increased 55.5 kg by pure nitrogen per kilogram.Nitrogen fertilizer could increase the N,P_2O_5,K_2O uptake and accumulation of Leymus chinensis.

关 键 词：羊草 氮肥 产量 养分吸收 

分 类 号：S543.9[农业科学—作物学]