2003-2010年克氏针茅放牧草地资源的变化

发布时间：2018-06-03 06:55

本文选题：克氏针茅草地 + 植物群落　；参考：《草业科学》2014年04期

【摘要】：对锡林郭勒克氏针茅(Stipa krylovii)草原5个典型聚居区的放牧草地,在2003、2007和2010年的冬春季和夏秋季放牧地定期进行植物群落调查。结果表明,围栏放牧草地常见植物有60种,草地建群种克氏针茅和羊草(Leymus chinensis)的优势度在冬春季和夏秋季两季草地中均保持递增,而草地沙化退化指示种猪毛菜(Salsola collina)优势度始终递减。随着放牧草地内牲畜平均占有草地面积的增加,克氏针茅、羊草等地带性植物种的优势度迅速增大,猪毛菜的优势度迅速减小,至每个牲畜平均占有草地面积大于3.5hm2的3年后,猪毛菜退出草地植物群落的优势物种行列。锡林郭勒克氏针茅草原放牧草地植物群落的30年演替历程与由政府主导的一系列草地归属权改革引发放牧方式的变更动态相关,同时短期演替过程与牲畜草地资源占有量相关。
[Abstract]:The herding grassland of Stipa krylovii (Stipa krylovii) steppe was investigated regularly in winter, spring and summer and autumn in 2003 / 2007 and 2010. The results showed that there were 60 species of common plants in fenced grazing grassland, and the dominance of Stipa krsinensis and Leymus chinensis were increased in winter, spring and summer and autumn. However, the dominance of Salsola Collina, an indicator of grassland desertification degradation, was always decreasing. With the increase of the average area occupied by livestock in grazing grassland, the dominant degree of zonal plant species such as Stipa krjabini and Leymus chinensis increased rapidly, and the dominance of porcine cabbage decreased rapidly, until the average area of grassland occupied by each animal was more than 3.5hm2 3 years later. Porcine leaves the dominant species of grassland plant community. The 30-year succession process of herding grassland community in Stipa Sinensis was related to the dynamic change of grazing mode caused by a series of grassland ownership reform led by the government, and the short-term succession process was related to the amount of livestock grassland resources.
【作者单位】：内蒙古师范大学地理科学学院;宁夏大学农学院;
【基金】：内蒙古自然科学基金资助重点项目(2009Zd10)
【分类号】：S812.8

【相似文献】