青海湖北岸不同类型退耕还草地群落物种多样性和生物量特征研究  

Species Diversity and Biomass Characteristics of Different Grain-for-green Grasslands in the Northern Region of Qinghai Lake

作　　者：刘玉[1,2,3] 马玉寿[1,2] 李世雄[1,2] 郑伟[1,2,3] 杨时海[1,2] 

机构地区：[1]青海省畜牧兽医科学院,西宁810003 [2]三江源区高寒草地生态省部共建教育部重点实验室,西宁810003 [3]青海大学,西宁810016

出　　处：《西北农业学报》2014年第1期48-52,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家科技支撑计划课题"高原天然草地保护恢复及合理利用技术集成于试验示范"(2007BAC30B04-03)

摘　　要：对青海湖北岸3种不同类型退耕还草地植物群落物种多样性、生物量和草地质量指数特征变化进行分析。结果表明,退耕还草地种草2a后播入种(青牧一号老芒麦、垂穗披碱草、无芒雀麦)在群落中均占据绝对优势地位;群落植物地上生物量明显提高,优良牧草产量显著增加(P<0.05);各退耕还草地与对照(CK)样地比群落相似性低,草地质量指数显著提高。Plant species diversity, biomass characteristics, and index of grass quality of three different grain-for-green grasslands in the northern region of Qinghai Lake on the Tibetan Plateau were investi gated after two years of grain-for-green grassland. Results showed that： （1） planted species Elymus sibiricu, Elymus nutan, Bromus inermi were dominant in the communities; （2） excellent forage bio mass was significant （P〈0.05） increased and thus enhanced community aboveground biomass; （3） the similarity of each converted grassland community and CK was lower; and （4） the index of grassland quality was increased dramatically.

关 键 词：青海湖北岸 退耕还草地 物种多样性 生物量 

分 类 号：S812.8[农业科学—草业科学]