台灣人工林疏伐成本之計量分析

A Quantitative Analysis on Thinning Costs of Forest Plantation in Taiwan

鄭欽龍(Chin-Long Zheng) ； 陳重銘(Chung-Ming Chen) ； 陳瑩達(Ying-Ta Chen)

《中華林學季刊》 39卷1期 (2006/03) Pp. 57-66

https://doi.org/10.30064/QJCF.200603.0005

摘要

本研究調查2001年林務局所進行的45件人工林疏伐計畫之地況、位置、作業方式及其成本。然後，應用多元迴歸分析法建立疏伐成本之計量模式，並用以推估不同狀況下的疏伐成本。研究結果顯示，疏伐成本主要取決林地之地區別、是否搬出疏伐木以及搬出株數。林地坡度小於25%，距離林道600公尺以內，且每公頃疏伐400株後仍保有適當蓄積之人工林，實施疏伐作業應屬可行。

關鍵字

人工林 ； 立木價金 ； 森林評價 ； 森林經營 ； 疏伐成本

並列摘要

The study investigated the site conditions, locations, practices and costs of 45 thinning projects of forest plantations done by Taiwan Forest Bureau in 2001. A quantitative thinning cost model based on the empirical data was set up by multiple regression method, and it was used to estimate thinning costs under certain conditions. The study result indicated that thinning cost was determined mainly by location of forestland, the number of thinned trees and whether or not hauling logs from forest. The necessary conditions of forestland to be feasible for thinning are: the slope of forestland less than 25%, the distance from logging road less than 600 meters, and keeping good stocking level after thinning 400 trees per hectare.

並列關鍵字

Forest management ； Stumpage value ； Forest plantation ； Forest valuation ； Thinning cost