放牧影响下羊草种群生物量形成动态的研究  

Biomass formation dynamics of Leymus chinensis population affected by grazing.

作　　者：王仁忠[1] 

机构地区：[1]东北师范大学国家草地生态工程实验室,长春130024

出　　处：《应用生态学报》1997年第5期505-509,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目!( 93 890 0 9 1 )

摘　　要：在种群水平上研究了放牧对东北草原羊草草地羊草种群生物量形成动态的影响 .结果表明 ,随放牧强度增加 ,羊草种群地上同化系统和非同化系统现存量、凋落物积累量及地下活根茎量和死根茎量均显著下降 .重度放牧阶段 ,羊草种群地上同化系统、非同化系统现存量分别为轻牧阶段的 48.6%和 49.4% ;地下活根茎量和死根茎量分别为轻牧阶段的 41 .3%和 51 .4% .同时地上同化系统与非同化系统间及地下活根茎量与死根茎量间具有相同的季节变化趋势 .This paper studied the effect of grazing on biomass formation dynamics of Leymus chinensis at population level in the northeastern China grassland. The results show that the assimilation system standing biomass (ASSB), unassimilation system standing biomass (UASSB),litter accumulation, living rhizome biomass (LRB) and dead rhizome biomass (DRB) were decreased significantly with increasing grazing intensity. At heavily grazing stage, they were respectively 48.6,49.4,41.3 and 51.4% of those at lightly grazing stage. The same seasonal variation tendency was found between ASSB and UASSR, and between LRB and DRB.

关 键 词：放牧 羊草 种群 生物量形成动态 

分 类 号：S543.901[农业科学—作物学]