作 者：
李小龙;曹文侠;张晓燕;李文;韦应莉;王小军
单 位：
甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心
摘 要：
以分布于祁连山东段的头花杜鹃(Rhododendron.Capitatum)、千里香杜鹃(R.thymifolium)、烈香杜鹃(R.anthopogonoides)和陇蜀杜鹃(R.przewalskii)为对象,研究了其株丛特征与海拔梯度间的关系。随着海拔升高,头花杜鹃、千里香杜鹃和烈香杜鹃的冠基呈降低趋势。随着海拔升高,头花杜鹃与千里香杜鹃的重要值增加,并显著大于其他物种。在海拔3 100m处,杜鹃灌丛群落物种组成和多样性均处于较高水平。随着海拔升高,杜鹃灌丛总盖度逐渐降低。千里香杜鹃的分盖度在海拔3050m较小。头花杜鹃的分盖度在各海拔梯度上均较大。头花杜鹃和千里香杜鹃的植株高度随着海拔升高而逐渐降低。
译 名：
The plant characteristic of four Rhododendron species at different altitude gradient in Qilian Mountain
作 者：
LI Xiao-long;CAO Wen-xia;ZHANG Xiao-yan;LI Wen;WEI Ying-li;WANG Xiao-jun;College of Pratacultural Science,Gansu Agricultural University/Key Laboratory of Grassland Ecosystem,Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S.Centers for Grazingland Ecosystem Sustainability;
关键词：
Rhododendronshrub;;pant characteristics;;altitude gradient
摘 要：
Four Rhododendron shrubs(Rhododendron capitatum,R.thymifolium,R.anthopogonoides,and R.przewalskii)were chosen as indicators to study the relationship between plant characteristics and altitude gradients in the Qilian Mountain in the eastern Qinghai-Tibetan Plateau.The results revealed that the crown width of R.Capitatum,R.thymifoliumand R.anthopogonoide decreased with altitude increasing.The specious important value of Rhododendron.capitatumand R.thymifoliumincreased with the altitude increasing,and was significantly higher than that of other species.The species composition and diversity reached the highest level at the 3 100 maltitude.The total coverage of Rhododendronshrubs gradually decreased with altitude increasing.The sub-coverage of R.thymifoliumreached the lowest level at the 3 050 maltitude.The sub-coverage of R.capitatum was higher than that of other species.The height of R.capitatumand R.thymifolium gradually decreased with altitude increasing.
