科尔沁沙地草场植物组成及生物量动态的研究  

STUDIES ON PLANT SPECIES COMPOSITION AND BIOMASS DYNAMICS OF GRASSLAND IN KORQIN SANDY LAND

作　　者：常学礼[1] 李胜功[1] 

机构地区：[1]中国科学院沙漠研究所

出　　处：《草业科学》1994年第6期48-51,共4页Pratacultural Science

摘　　要：本文对科尔沁沙地草场植物组成和生物量动态进行了研究，结果表明：草场地上生物量在８月达到最高峰５６９ｇ／ｍ２，生物量组成以灌木类植物最高占总生物量的４３％～７３％。从植物种的重要值变化来看，灌木类植物重要值从５～８月在群落中逐渐降低，９月随其它类植物的枯落重要值升高；一年生草本植物的重要值变化与灌木类植物相反，而群落生态优势度的变化规律与灌木类植物的重要值变化则相同。The species composition and biomass dynamics of grassland in Korqin sandy land were studied in thispaper.The results showed that:Above ground biomass reached the peak of 569 g/m2 in August.Theshrubs were the most in the composition of biomass.they accounted for about 43%～73%of the totalbiomass.The im portant value of the shrubs gradually decreased in the communities from May to August,but it increased in Septem ber with the other plants,litter.The important value of annual herbs wereopposite to the shrubs,the dominance of ecological community was the same as the shrub.

关 键 词：生物量 植物组成 草场 科尔沁沙地 

分 类 号：S812.3[农业科学—草业科学]