Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/65656
標題: 臺灣大雪山地區紅檜人工林生長收穫系統之研究
The System of Growth and Yield for Chamaecyparis formosensis Plantations in Ta-Hsueh-Shen Area of Taiwan
作者: 顏添明
Yen, Tian-Ming
關鍵字: Chamaecyparis formosensis;紅檜;thinning;growth and yield;stand structure;stand density management;疏伐;生長收穫;林分結構;林分密度管理
出版社: 森林學系
摘要: 
本研究旨在探討紅檜人工林疏伐林分生長收穫及密度管理等相關問題,其
內容包括林分直徑分布、生長收穫及林分密度管理等部分。在林木經營上
,將林分結構及林木生長收穫量予以「數量化」有其必要性,而林分密度
管理之方法更可提供實施疏伐撫育作業具體之依據,故對以上問題詳加研
究及分析,將可提供森林經營具體之資訊。
研究之試驗地位於本省中部大雪山地區(屬林務局東勢林區管理處大安溪
事業區)之紅檜人工林疏伐林分(具三個不同齡級),並於該林分設置永久
樣區,以蒐集永久樣區歷年之林木生長相關資訊。
本研之目的係在探討(1)單木及林分層級生長收穫模式之建立,(2)影響林
分結構因子和直徑分布模式之相關性,並分析直接推估模式和間接推估模
式之適用性,(3)紅檜人工林林分密度管理圖之建立。
由研究所得之主要結果分述如下:
以 A 林分為例探討紅檜人工林單木之胸高斷面積生長,採用以往所發展
之著名生長模式 Schumacher、Mitscherlich、Logistic、Gompertz、
Richards、Modify-Weibull及Schnute 等模式模擬之,所得之結果以三參
數之 Richards 模式的模擬效果最佳,該模式不但曲線富彈性,且可明確
表達林木於生長過程中之生物性。
於不同疏伐強度處理之單木性態值生長探討其最大連年生長(生長速率)發
生的時間可知,就不同疏伐強度處理之單木性態值生長而言,材積及胸高
斷面積之最大生長速率發生時間隨疏伐強度之增加而提早,顯示疏伐作業
能提早此二種性態值最大生長速率之發生時間,樹高生長之最大生長速率
發生時間則幾乎不受疏伐強度所影響。
林分層級模式包括相對存活模式、地位指數曲線、及直徑分布模式之建立
。直徑分布模式所採用之機率密度函數為 Weibull函數,以直接及間接推
估模式探討影響林分結構變因(林齡、林分密度、地位) ,並以
Kolmogorov-Smirnov 適合度測驗檢測直接推估模式及間接推估模式在不
同層級步驟中所產生之誤差量,經詳細分析探討誤差之原因,進而提出整
合直接和間接推估模式的方法,所得之結果皆較直接和間接推估模式優異

最後,由以往所蒐集之資料建立本區域之紅檜人工林林分密度管理圖,此
為林木「定量」疏伐作業之依據,可由該圖指導疏伐作業之實施。
以上研究所得之結果,將可提供紅檜人工林經營詳盡的資訊,做為經營決
策之重要參考依據。

This paper is concentrating on timber management for
even-aged thinned stands of Chamaecyparis formosensis
plantations. To quantify stand structures and growth is necessary
for timber management. The technique of stand density control can
provide an important information for thinning operation. So make
a study of sysetm of growth and yield have a special meaning in
forest management.
Data of this study were collected from permanent plots of
three different even-aged thinned satnds of Chamaecyparis
formosensis plantations on Ta-Hsueh-Shan,central Taiwan.
The purpose of this study are:(1) to develop growth and yield
models of individual tree and stand for thinned stands of
Chamaecyparis formosensis plantations,(2) to study the
influential factors of stand structure by direct and indirect
methods, (3) to establish stand density management diagram.
The summary of obtained result is as follows:
We taking A stand as an example ,explores growth processes of
individual tree,seven growth functions were applied in basal area
growth of individual tree, namely Schumacher,Mitscherlich,
Logistic,Gompertz, Richards,Modify-Weibull and Schnute growth
model,respectively. The applicability of those models were
discussed in this study. We find that 3 parameters Richards
growth model is superior to others. Its advantages include
flexibility in shape and biological meaning in growth process.
In different thinning intensity stands,the effects of
relative growth spacing variation on growth in terms of basal
area ,height and volume of individual tree,the relationship
between the time of maximum growth rate(tmax) and thinning
intensity can express as follow :the heigher the stand density
(the lower thinning intensity),the later tmax; in basal area and
volume of individual tree,but tree height seems to do not
correlate with thinning intensity.
In stand level, relative survival functions, site index
curves and diameter distribution models were discussed in study
area. Diameter distributions of each permanent plots is fitted by
three parameters Weibull probability density function. We
analyese influential factors of stand structures by direct and
indirect estimation methods,then examined errors of each step by
Kolmogorov-Smirnov for the goodness of fit. After much discussion
about the errors of each step,we integrated direct and indirect
estimation methods, and find it is superior to direct and
indirect estimation methods.
Finally,the stand density management diagram of Chamaecyparis
formosensis is developed in this study area. It can provide a
quantitative approach for thinning operation.
The findings will provide detailed information for even-aged
thinned stands of Chamaecyparis formosensis plantations.
URI: http://hdl.handle.net/11455/65656
Appears in Collections:森林學系

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