张家沟小流域水保林生态效益分析

An Analysis of the Ecological Benefits of the Water-conserved Forest in the Zhangjiaguo Drainage Area

森林为人类提供了丰富的物质产品 ,巨大的直接经济价值有目共睹 ,但很少有人注意到其潜在的经济价值。本文通过对森林各生态指标的评价 ,从六个方面对铜梁县张家沟小流域水保林的潜在经济价值进行了较为详尽的探讨 ,计算得出张家沟流域在 1983～ 1993年 10年间所种植的 2 5 6 .6 3hm2 水保林 ,到 1993年为止为取得的潜在经济价值达 15 5 6 .6万元 ,约为直接价值的 8.5 8倍。从而证明了森林除具有直接经济价值之外 ,还具有巨大的潜在经济价值 ,并且对流域生态环境及农业生产良性发展有重大意义 ,认为任何忽视森林间接价值的做法都是不明智的。

The forest provides humanity with abundant material products.Its enormous direct econominc value is obvious to us all,but few people take notice of its potential economic value.Through the analysis of the evaluation of ecological indexes of the forest,a detaited study has been conducted on the potential econonic values of the mater conserved forest in the Zhangjiaguo Drainage Area from six aspects.Through calcutation,the potential economic value obtained from the trees planted in 1983 1993 with the tolal area of 256.63 hm 2 was $1 566 000,i.e.8.5 times that from the direct economic value.This proves the existence of enormous potential value and great significance for the healthy developncent of the ecological environment and agricultare.The practice of ignoring the indirect value is imprudent.