【摘要】 为了全面有效地评价黔西北喀斯特区域退化植被的恢复潜力,从而为该区域退化植被恢复的优先顺序以及恢复策略和技术的制定提供理论支撑,基于地上群落、繁殖体库、土壤基质和干扰状况4类指标群信息的13个指标,构建综合评价模型对该区域自然恢复过程中处于不同演替阶段的11个群落进行恢复潜力评价。结果将11个退化群落样地(1～11号)按综合恢复潜力指数(PI)分为四类,即PI<0.20(1、2号样地);0.20<PI<0.40(3、5号样地);0.40<PI<0.55(8、9号样地);0.55<PI<0.70(6、7、10、11号样地),这一结果与实际情况相符。总的来看,与地上群落和繁殖体库相比,土壤基质状况较好且变异较小,说明土壤基质不是该区域植被恢复的限制因子,充足的木本植物繁殖体源将发挥越来越重要的作用。该模型可作为一个有效的技术来监测喀斯特退化植被的恢复进程。更多还原

【Abstract】 Our objectives were to accurately assess restoration potential of degraded karst vegetation in north-west of Guizhou.This research will provide scientific bases for prioritizing and forming corresponding restoration practices.An comprehensive evaluation model was constructed to assess restoration potential of 11 karst communities at different succession stages in Northwest of Guizhou which representing a chronosequence of grassland to young forest.13 indexes from four groups representing characteristics of aboveground vegetation,of propagulum banks,of soil matrix and of man-made interference were used to examine the potential degree of degraded communities approaching reference natural forest.According to the index of the comprehensive restoration potential(PI) from small to large,all sample plots were classified five categories: PI<0.2;0.2<PI<0.4;0.4<PI<0.55;0.55<PI<0.7;PI> 0.7,the result was matched with the fact.In general,compared with aboveground vegetation and propagulum banks,the restoration potential of soil matrix was better and its variation was small which indicated that the soil matrix wasn’t a limiting factors of vegetation restoration in study areas,while sufficient propagulum will exert a growing important effect.This model can be a useful technique for monitoring restoration programs in karst degraded vegetation.更多还原