首页 | 本学科首页   官方微博 | 高级检索  
     检索      

退化高寒干旱草地植物群落多样性特征
引用本文:祁彪,张德罡,丁玲玲,张力,汪玺,杨予海.退化高寒干旱草地植物群落多样性特征[J].甘肃农业大学学报,2005,40(5):626-631.
作者姓名:祁彪  张德罡  丁玲玲  张力  汪玺  杨予海
作者单位:1. 甘肃农业大学草业学院,甘肃,兰州,730070
2. 中国农业科学院兰州畜牧与兽药研究所,甘肃,兰州,730030
3. 青海省三角城种羊场,青海,刚察,812300
基金项目:科研院所社会公益研究专项资金项目“青藏高原生态畜牧业研究与示范”(2001DIA30060)资助.
摘    要:对青海省三角城种羊场的高寒干旱草地植物群落多样性特征进行了调查研究,结果表明,随退化程度的加剧,放牧草地的群落物种组成、结构和植被群落多样性发生了重大改变。在长期的放牧利用过程中,草地群落的优势物种由原始的赖草、早熟禾逐渐演变为紫花针茅,其伴生种也发生了明显的相互更替。随着草地退化程度的加重,群落的植物多样性和物种丰富度及均匀度都明显的随之降低,而群落的优势度逐步增大。而围栏封育的草地物种多样性、丰富度和均匀度均显著低于适度放牧利用的草地。因而,对于高寒干旱草地,适度的放牧利用有利于群落物种丰富度和多样性的提高,过度放牧势必导致植被群落的逆向演替,长期的围栏封育并不利于物种多样性和丰富度的提高。

关 键 词:高寒干旱草地  退化草原  群落组成  植物群落多样性  青海三角城种羊场
文章编号:1003-4315(2005)05-0626-06
收稿时间:2005-05-09
修稿时间:2005-05-09

Properties of plant community diversity of degraded alpine arid grasslands
QI Biao,ZHANG De-gang,DING Ling-ling,ZHANG Li,WANG Xi,YANG Yu-hai.Properties of plant community diversity of degraded alpine arid grasslands[J].Journal of Gansu Agricultural University,2005,40(5):626-631.
Authors:QI Biao  ZHANG De-gang  DING Ling-ling  ZHANG Li  WANG Xi  YANG Yu-hai
Institution:1. College of Pratacultural Science, Gansu Agricultural University,Gansu,Lanzhou 730070 ; 2. Lanzhou Institute of Animal Husbandry and Animal Medicine,Chinese Academy of Agricultural Sciences,Gansu,Lanzhou 730030; 3. Sanjiaocheng Sheep Breeding Farm of Qinghai Province, Qinghai , Gangcha 812300, China
Abstract:Properties of plant community diversity of alpine arid grasslands along different degraded grade of Sanjiaocheng sheep breeding farm in Qinghai province were analyzed.The results showed that:with grassland degradation aggrivating,the composition,structure and species diversity of plant communities have been changed to a great extent.Dominant species of plant communities successed from primary species such as Levmus secalinus and Poa crvmophila to Stipa purpurea,and companion species obviously successed from each other because of long-term grazing on grassland.With aggravation of grassland degradation,species diversity,richness and evenness of plant communities obviously decreased,while dominance of community gradually increased.However,species diversity,richness and evenness of plant communities of fenced grassland were apparently lower than that of suitable grazing.It is indicated that suitable grazing on grassland could increase species diversity and richness of plant communities,overgrazing on grassland could inevitably result in converse succession,and long-term fencing treatment was unfavor able for increasing species diversity and richness of plant community.
Keywords:alpine arid grassland  grassland degradation  composition and structure of community  species diversity of plant community  Sanjiaocheng sheep breeding farm of Qinghai province
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号