改进邻体干扰模型在北京侧柏水源涵养林中的应用

以北京市密云半城子侧柏水源涵养林为研究对象,提出了改进的邻体干扰模型,着重讨论了干扰指数与侧柏的胸径、树高、生境利用率等因子的关系。结果表明,侧柏林内的邻体干扰指数与林木的胸径、树高、生境利用率呈负相关关系。本研究为该地区水源涵养林的经营提供了具有参考价值的量化依据。

Application of Improved Neighborhood Interference Model to the Water Conservation Forest of Chinese Arborvitae in Beijing

This paper puts forward an improvement on neighborhood interference model linked to the practical instance of research-the water conservation forest of platycladus orientalis in Ban Chengzi of Miyun County,Beijing,and discusses the relationship between Interference Index(I) and the diameter at breast height(DBH),tree height,the efficiency of condition utilization,and then comes to a conclusion that the interference index is negative correlativity with DBH,tree height and efficiency of condition utilization.The interference index acutely varies with the change of factors in the stand of high density(3075 per hm~(-2).) and the interference index of the large tree is small but that of the small tree is high.It presents a position of polarization.The interference index gradually falls with the change of factors in the stand of low density(2730 per hm~(-2).) and the efficiency of condition utilization of tree of interference index high of 3(I>3) is lower while that of tree of interference index low of 1(I<1) is very high.In the stand of high density the relativity of the interference index with DBH and tree height is higher,but in the stand of low density that of the interference index with the efficiency of condition utilization is higher. The research can offer basic material for rational water conservation forest management.