佛坪自然保护区巴山木竹种群地上生物量及其回归模型

为探讨巴山木竹地上部分生物量及其分配规律,以深入理解秦岭山系大熊猫对巴山木竹的觅食对策和环境承载力,于2008年11月到2009年4月通过设置样方对陕西佛坪自然保护区三官庙保护站管护范围内巴山木竹的生物量进行了调查.结果表明随着龄级增长,巴山木竹地上生物量呈增长趋势,各器官生物量所占比例大小依次为：茎＞枝＞叶.在海拔梯度上,以1600-1800m巴山木竹地上生物量最大.通过回归分析显示,巴山木竹竹叶生物量可以通过竹株基茎以幂函数进行较好地拟合.上述研究结果表明,为保护好研究区域内大熊猫的冬居地,应有效控制海拔1600-1800m落叶阔叶和针阔混交林中的人为活动.

The Overground Biomass and Regression Models of Bashania Fargesii Population in Foping Nature Reserve,China

To understand overground biomass structure and different organs＇ allocation patterns of Bashania fargesii in Foping Nature Reserve, China, and to explore giant pandas＇ foraging strategies and carrying capacity in the Qin- ling mountains, samples of Bashania fargesii across age classes were collected from November 2008 to April 2009. The results showed the overground biomass of Bashania fargesii differed significantly across age classes. The propor- tion of biomass for different organs was as follows： stem 〉 branch 〉 leaf. As for elevation gradient, the largest bio- mass of Bashania Fargesii occurred in 1600 - 1800m. In addition, biomass of leaves can be well fitted with basal diameter through regression analysis methods. Above results implied that to protect giant pandas, human activities should be controlled, especially in deciduous broad-leaved forest and needle-leaved forest of 1600 - 1800m in win- ter.