相岭山系大、小熊猫主食竹类峨热竹的生长发育与环境因子间的相互关系

1994～1996年,在相岭山系冕宁县治勒自然保护区设点,对大熊猫和小熊猫主食竹类峨热竹与其它环境生态因子间的相互关系进行了长达3a的研究。研究结果表明,峨热竹的生长发育与环境生态因子如海拔、郁闭度、坡度和坡向之间有极其显著的相关关系,环境因子对其株高、基径、密度、发笋率、老笋比例和成竹死亡率等有较大的影响。随海拔高度的增加,竹子变矮变细,老笋比例下降;上层乔木郁闭度增加,竹子变稀,发笋率、老笋比例和成竹死亡率均降低。坡度增大,竹子变稀并且细而矮。阳坡的竹子率发笋高于阴坡。

Association between environmental factors and growth of bamboo species Bashania spanostachya ,the food of giant and red pandas

A study on the association between the environmental factors and bamboo Bashania spanostachya growth(culm height,culm basal diameter,density,shoot generation,proportion of old shoots and death rate of adult culms),was conducted from 1994 to 1996 in Yele Natural Reserve,Sichuan Province.The results showed that the environmental factors such as canopy cover,slope,aspect,altitude significantly influenced the bamboo growth.As the altitude increased,bamboo culms became shorter and slender,and proportion of old shoots decreased.Culm density,shoot generation rate and death rate of adult culms decreased with the canopy increasing.Furthermore,the bamboo culms became sparser,shorter and slender as the slope increased.