生态学杂志2011，Vol.30Issue(10)：2233,1.
牦牛放牧强度对小嵩草草甸两季轮牧草场植物群落数量特征的影响
Effects of yak grazing intensity on quantitative characteristics of plant community in a two-seasonal rotation pasture in Kobresia Parva meadow.
摘要
Abstract
A two-year yak grazing trial was conducted in a two-seasonal grazing pasture in Kobre-sia parva meadow to study the variations of the quantitative characteristics of plant community in the pasture in warm season and cold season. Within the grazing periods of the two years, the coverage of high quality forage in the pasture decreased with increasing grazing intensity, while the coverage of weeds had an increasing trend. The dominant plant species under no grazing, light grazing, and moderate grazing in both warm and cold seasons were K. Parva and Elymus nutans; whereas the dominant species under heavy grazing were Potentilla anserine and Pedicularis alas-chanica in warm season, and K. Parva and P. Anserine in cold season. The larger the difference in grazing intensity, the lower the similarity of the community in the two seasons, indicating that grazing was the major factor leading to the difference in the community, and the predominant factor inducing the community change. The species richness, diversity index, and evenness index of the plant community in warm and cold seasons were all the lowest under no grazing, and the highest under moderate grazing, with the order of no grazing < light grazing < heavy grazing < moderate grazing, which supported the ' hypothesis of medium disturbance'.关键词
放牧强度/盖度/优势度/相似性系数/多样性指数Key words
grazing intensity/coverage/dominance/similarity coefficient/diversity index分类
农业科技引用本文复制引用
董全民,赵新全,马玉寿,施建军,王彦龙,李世雄,杨时海,盛丽..牦牛放牧强度对小嵩草草甸两季轮牧草场植物群落数量特征的影响[J].生态学杂志,2011,30(10):2233,1.基金项目
国家“十一五”科技支撑计划重大项日(2006BAC01A-02)、国家“十一五”科技支撑计划项目(2007BAC30B04、2009BAC61B02)、国家自然科学基金项目(30960074)和青海省科技厅重点项目(2009-N-502)资助. （2006BAC01A-02）
