禁牧封育对黑土滩人工草地群落特征的影响  

Effect of Forbidden Grazing and Exclusion Grassland on Communities Characters of Artificial Pasture in "Back Soil Beach"

作　　者：刘德梅[1] 马玉寿[2] 董全民[2] 施建军[2] 王彦龙[2] 张金旭[1] 

机构地区：[1]甘肃农业大学草业学院,兰州730070 [2]青海省畜牧兽医科学院草原研究所,西宁810016

出　　处：《青海畜牧兽医杂志》2008年第4期10-12,共3页Chinese Qinghai Journal of Animal and Veterinary Sciences

基　　金：2005年度青海三江源自然保护区生态保护和建设总体规划科研课题及应用推广招标项目(2005-SN-1);国家"十一五"科技支撑计划重大项目(2006BAC01A02)

摘　　要：对三江源区"黑土滩"四龄垂穗披碱草人工草地进行围栏禁牧封育,封育期为一年,8月中旬进行群落调查,以冷季放牧利用的四龄人工草地作为对照,分析围栏内外样地的群落特征。结果表明:禁牧封育使"黑土滩"四龄垂穗披碱草人工草地物种丰富度,多样性指数,均匀度指数显著降低,生态优势度和优势种的重要值显著提高,禁牧封育与放牧利用的群落相似性系数为0.5。Tbe forbidden grazing and exclusion grassland for the artificial pasture with four-year-old Elymus nutans was conducted by means of fence in ＂back soil beach＂ in the region of sources of three rivers for one year. The communities character were investigated in the second ten days August. The communities characters of sample land were analysed between inside and out side of fence in contract with four-year-old artificial pasture which was grazed in cold season. The results showed that the species abundance, the diversity index and the evenness index were significantly decreased and the ecological dominant index and the imporment value of dominant species were significantly increased in the artificial pastnre with four-year-old Elymus nutans of ＂back soil beach since＂ forbidden grazing and exclusiox grassland were conducted. The coefficient of commnity similarity was 0. 5 between forbidden grazing and exchusion grassland and grazing.

关 键 词：禁牧封育 “黑土滩”人工草地 群落特征 

分 类 号：S812.4[农业科学—草业科学]