台灣與大陸杉木人工林生長之研究比較

Abstract

杉木在台灣早期有一定的栽植面積和數量，並廣泛應用於林產加工品，雖然杉木的研究文獻有一定的量，但是在杉木生長比較的研究上卻是比較缺乏的；又杉木在大陸也具有廣泛的分布和數量，因此本研究藉由收集兩地杉木在文獻資料或野外調查的數據，建立兩地杉木的林分胸徑、林分樹高、林分密度、林分胸高斷面積和林分材積之生長平均線，並以不同模式加以配適後進行兩地比較。結果顯示，兩地在生長平均線上，其林分胸徑生長在幼、壯齡期相似；在模式配適上，杉木大部分的生長性狀以Schnute模式的配適情形最佳。另外，本研究也建立杉木林分參數推估式，發現當兩地以林分胸高斷面積推估林分材積時，可以得到R2在0.89左右，此有助於預測杉木人工林分材積量。

There are many plantations of Cunninghamia lanceolata in the early period of Taiwan. It has been used as forest products in the same time. Although there is much literature on the subject of the growth of Cunninghamia lanceolata plantation, it’s lesser research on growth comparison. There are many plantations of Cunninghamia lanceolata in existence in China also. This study selected data of literature or field survey, and established the mean growth curves of the stand DBH, stand tree height, stand density, stand basal area and stand stock in two countries, and then applying models to fit mean growth curves. The result reveals it has high similarities on the mean growth curve of DBH when Cunninghamia lanceolata plantation is in the young and middle-age period. The simulation effects of Schnute growth model are much better than other models. Besides, when we use stand basal area as an independent variable to estimate the stand stock, the coefficient of dertermination can reach about 0.89. This result will help us predict the stand stock.