放牧和刈割对坝上草原羊草根茎与营养枝生长的影响  

Effects of grazing and cutting on growth of vegetative shoots and rhizomes of Leymus chinensis in bashang grassland

作　　者：林金宝[1] 陈本建[1] 李向林[2] 张鹤山[1] 

机构地区：[1]甘肃农业大学草业学院 [2]中国农业科学院畜牧研究所草地生态实验室,北京100000

出　　处：《草原与草坪》2008年第1期49-53,共5页Grassland and Turf

基　　金：国家科技支撑项目(2006BAD16B05);国家科技攻关项目(2004BA528B-1-4)资助

摘　　要：在河北张家口坝上羊草草原上,选择植被均匀、微地形差异较小的割草地和放牧地作为研究样地,通过对羊草种群的营养枝和根茎两个指标研究表明:割草地与放牧营养枝和根茎呈不显著拮抗关系,放牧地根茎随季节波动性要显著大于割草地。综合分析结果表明,割草地羊草种群的营养枝和根茎生物性状要优于放牧地。The effects of grazing and cutting on growth of vegetative shoots and rhizomes of Leymus chinensis were studied by selecting the sampling fields with uniform vegetation and less difference of micro-topography in L. chinensis grassland of Bashang plateau, Zhangjiakou in Hebei province. The resulta show that there were no trade-off between the biomass of vegetative shoots and the biomass of rhizome in both grazing fields and mowing fields. The fluctuation of rhizome biomass with the changing of seasons in grazing fields was more significant than that in mowing fields. The results also show that the biological characters of the vegetative shoots and rhizomes of leymus ehinensis population in mowing fields were better than those in grazing fields.

关 键 词：坝上草原 羊草 营养枝 根茎 

分 类 号：S812[农业科学—草业科学] S543.059[农业科学—畜牧学]