摘要
选择青海省海北地区高寒草甸为研究对象,采用样方调查法,初步分析了该地区高寒草地群落特征。结果表明:1)随着放牧强度增加,地上生物量逐渐降低。2)随着放牧强度增加,高寒草甸物种数目逐渐降低;物种多样性和均匀性指数均呈先增加后降低的趋势。相对于轻度放牧,中度放牧干扰增加了物种多样性指数。3)优良牧草生态位均较高,但放牧强度对其有显著影响。认为:对处于轻度、中度放牧草地,需要维持一定放牧强度,辅助采取补播、耙松、或适当去除毒杂草等方式。对于重度、极重度放牧草地,需要降低放牧强度,通过施肥或者采取建植人工草地方式,有助于其植被恢复。
The quadrat sampling method is used to analyze community characteristics of alpine meadow in Haibei area of Qinghai province.The results showed that the aerial biomass and species number gradually decreased and indexes of species diversity and evenness first increased and then decreased with increment of grazing intensity,the middle grazing raised the species diversity index compared with light grazing,and grazing intensity significantly influenced the ecological niches of high quality meadow.Therefore,the suitable grazing intensity and other measurements including replanting,harrowing and weeding et al.should be used in meadows with light and middle grazing intensity.Otherwise,the vegetation of meadows with higher grazing intensity should be recovered by decreasing grazing intensity,building artificial grassland and applying fertilizer.
出处
《贵州农业科学》
CAS
北大核心
2010年第5期128-132,共5页
Guizhou Agricultural Sciences
基金
中国科学院研究生科技创新项目"高寒草地群落特征研究"
关键词
高寒草甸
群落特征
物种多样性
生态位宽度
alpine meadow
community characteristic
species diversity
niche width
作者简介
李春刚（1982-），男，助理工程师，从事植物生态学研究。E—mail：dyg1981@yahoo．cn
