【摘要】 为揭示2008年汶川地震后大熊猫主食竹拐棍竹无性系种群的天然更新状况及影响因子,研究了3种不同地震干扰强度(强度、中度和对照)生境中拐棍竹的生长和发笋状况.结果表明:在3种生境中,拐棍竹存活笋的基径为中度干扰和对照生境显著大于强度干扰生境,存活笋的高度为对照>中度干扰>强度干扰.其发笋密度在3种生境中无显著差异,但强度和中度干扰生境中的存活笋密度显著大于对照,并且1年生和2年生竹密度与死亡竹密度之间呈极显著正相关.拐棍竹的发笋密度、存活笋密度、1年生、2年生和多年生竹密度之间均呈显著正相关,1年生和2年生竹密度与砾石和滑坡土壤盖度呈显著负相关,存活笋密度与郁闭度之间呈显著负相关.更多还原

【Abstract】 To explore the natural regeneration and its affecting factors of Fargesia robusta clone population,the main diet bamboo for giant panda,after Wenchuan Earthquake in 2008,an investigation was conducted on the growth and emergence of the bamboo shoots at three habitats with different intensities(strong,moderate,and null) of earthquake disturbance.In the moderately and undisturbed habitats,the basal diameter of the survived bamboo shoots was significantly greater,as compared with that in strongly disturbed habitat,and the height of the survived shoots decreased in the order of undisturbed > moderately disturbed > strongly disturbed habitat.No significant difference was observed in the density of new bamboo shoots among the three habitats,but the density of the survived bamboo shoots was significantly higher in the strongly and moderately disturbed habitats than in the undisturbed habitat,and the density of 1-and 2 years old bamboos showed a significant positive correlation with the density of dead bamboos.There existed significant positive correlations between the densities of new bamboo shoots,survived bamboo shoots,and 1-,2-,and more years old bamboos,but significant negative correlations between the density of 1-and 2 years old bamboos and the coverage of gravels and slipping soils by Wenchuan Earthquake in 2008,and between the density of survived bamboo shoots and their canopy coverage.更多还原