摘要
2005～2007年,在相同的草地利用单元上选择3个具有典型放牧梯度的重复样地,用样方法测定草地植物群落特征,分析不同放牧强度对草地基况和生产力的影响以及草地生产力与草地基况的关系。结果显示:随着放牧强度的增加草地基况变差,放牧干扰对草地生产力有显著影响;草地基况与草地生产力不能构成相关模型,但良好的草地基况能够维持较高的生产力,较高的生产力是草地基况和环境条件的综合反映,即在较好的环境条件(降水丰沛)下,较差基况水平的草地也能产生较高的生产力;在较差的环境条件下,良好的草地基况水平依然能够维持较高的生产力。
Three repeated sampling areas that have typical grazing gradient in the same grassland site in 2005～2007 were selected,the characteristics of grassland plant communities were determined with quadrat method.The effects of different grazing intensity on the grassland condition and productivity as well as the relationship between productivity and grassland condition were analyzed.The results showed that with the increase of grazing intensity,grassland condition became worse,grazing disturbance had a significant impact on grassland productivity;grassland condition and productivity can＇t constitute a relevant model,but a good grassland condition can maintain higher productivity,higher productivity was a comprehensive reflection of grassland condition and environment condition,i.e.under a good environment condition,worse grassland condition may produce higher productivity;under a worse environment condition,good grassland condition may also maintain higher productivity.
出处
《中国草地学报》
CSCD
北大核心
2010年第2期61-65,共5页
Chinese Journal of Grassland
基金
国家自然科学基金项目(30060056)
国家"十一五"科技攻关项目(2006BAD16B01)
东北农业大学博士启动金项目
关键词
草地基况
放牧强度
生产力
草地健康
Grasslands condition
Grazing intensity
Productivity
Grassland health
