摘要
草原退化是内蒙古生态环境恶化的突出表现。在内蒙古典型草原地带，选定有代表性的羊草＋大针茅草原放牧退化演替变型———冷蒿群落实行封育禁牧，在自然恢复演替过程中（１９８３～１９９４年）进行动态监测。根据连续１１年监测的数据，阐述了植被恢复演替的动态响应，划分了群落恢复进程的四个阶段：冷蒿优势阶段、冷蒿＋冰草阶段、冰草优势阶段、羊草优势阶段。群落生产力由１９８３年的７４ｇ／ｍ２跃升到１９９３年的２１７ｇ／ｍ２，其中羊草是增产最高的种群。退化群落中的土壤水分与养分资源对生产力的恢复没有限制影响。植物种群拓植能力与退化群落资源过剩成为恢复演替的趋动和保证因素。经过１０余年的恢复，虽然群落生产力已接近于原生群落，但是从群落结构和稳定性来看，还未完全达到顶极群落状态。退化群落经过５年封育即可以恢复合理利用。
The steppe degenerate is outstanding expression of ecological environment deteriorate in the Inner Mongolia In the Inner Mongolia typical steppe zone, selected representative succession aberration of Leymus chinensis+Stipa grandis——Artemisia frigida community, carry on grazing prohibited and protect the vegetation In the process of restorative succession (1983～1994) engage in determine of dynamic In this paper, on the basis of data in eleven years make a restorative succession dynamic respond In the process of restorative succession divide four stages: Artemisia frigida stage, Artemisia frigida+Agropyron michnoi stage, Agropyron michnoi stage, Leymus chinensis stage The productivity of plant community from 74 g/m 2 in year 1983 to 217 g/m 2 in year 1993 The Leymus chinensis is population of proliferation supreme But this stage is not a climax
出处
《气候与环境研究》
CSCD
1997年第3期39-43,共5页
Climatic and Environmental Research
基金
国家自然科学基金
国家自然科学基金
关键词
内蒙古
退化草原
封育恢复
动态响应
Inner Mongolia degenerated steppe restoring succession dynamic respond
