摘要
为了更好地揭示退化喀斯特森林不同演替阶段群落恢复状况,以修文县示范区为研究对象,采用指标敏感度从群落组成结构、群落演替和土壤理化质量等3个方面筛选出18个评价指标,并通过层次分析法构建了退化喀斯特森林不同演替阶段群落近自然评价指标体系,对不同演替阶段群落的近自然度进行综合评价。结果显示:随着植被进展演替,群落近自然度综合指数呈现逐渐增大的趋势,从草坡阶段演替到乔木林阶段,群落近自然度综合指数从0.127上升到0.617;由于示范区的乔木林群落主要是早期型乔木林,群落自然度综合指数相对较低,群落还处于一个较低的演替阶段,需要进行群落结构调整;适时引入一些大高位芽植物,并对灌木层进行适当的疏伐,以此来优化群落组成结构,促使群落朝顶极群落演替。
In order to reveal the recovery states of degraded Karst forest communities in different succession stages, by taking the demonstration area of Xiuwen as study objective, using indicator sensitivity method, 18 indexes were filtered out from community composition and structure, community succession and soil physical and chemical qualities, and the near-nature appraisal target system of the degenerated Karst forest community in different succession stages has been constructed by the analytic hierarchy process, then the near-nature degree of the community was synthetically valuated. The results show that along with the vegetation progression of succession, the community near-naturalness composite index increased gradually; when the succession of grassy slope stage changed to the tree forest stage, the community near-naturalness composite index rose from 0.127 to 0.617; because of the arbor community in the demonstration zone mainly was the early arbor type forest, the near-naturalness composite index was in a relatively lower level, and the community was still in a lower succession phase, their community structure need to be adjusted： the measures should be used such as introducing some Macrophanerophyte, and reducing the shrub layer density, thus optimizing the community composition and structure, and making the community succession toward to the climax community.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2012年第6期87-91,共5页
Journal of Central South University of Forestry & Technology
基金
中央财政林业科技推广示范资金项目([2009]TK066号)
国家"十二五"科技支撑计划项目(2012BAD22B01)
关键词
退化喀斯特森林
近自然度评价
评价指标体系
forest in degenerated Karst area
near-nature of evaluation
evaluation index system
