Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/66104
標題: 大雪山地區紅檜人工林地上部生物量與養分聚積
Above-ground Biomass and Nutrient Accumulation of Chamaecyparis formosensis (Taiwan Red Cypress) Plantation in Ta-Hsueh-Shan Area
作者: 陳俊文
Wen, Chen Chin
關鍵字: Chamaecyparis formosensis;紅檜;biomass;probability density function;生物量;機率密度函數
出版社: 森林學系
摘要: 
本研究旨在探討大雪山地區之14,21及29年生紅檜人工林地上部生物量及
養分聚積,以不同胸徑階選取樣木,並以分層割取法測定各樣木之各項形質
生長,再以胸徑為單一自變數之相對生長關係式估算地上部生物量與養分
聚積。研究結果獲悉: 14年生林分生物量為61.79ton/ha;氮198.94kg/ha,
磷30.93kg/ha,鉀203.33kg/ha,鈣249.87kg/ha及鎂42.46kg/ha。 21年生
林分生物量為105.02ton/ha;氮331.48kg/ha,磷54.95kg/ha,鉀286.66kg/
ha,鈣302.16kg/ha及鎂61.50kg/ha。 29年生林分生物量為84.19ton/ha,
氮234.95kg/ha,磷34.07kg/ha,鉀171.28kg/ha,鈣243.07kg/ha及鎂63.64
kg/ha。樣木之生產構造中,枝及葉量之垂直分佈顯示:葉量集中在樹冠之
上、中部位,樹冠下層留存大量之枯枝,亟須實施修枝作業以提高林木品質
。 Weibull機率密度函數能有效配置林分之直徑分佈,並可以此推測林分
各組成分生物量。林木之養分濃度以葉部較高,幹材最低,枝皮、幹皮及枝
材居中;隨著林分發育,由於組織部位之養分濃度上之變化較小,整個地上
部之養分聚積量隨著生物量之擴張而變動。

The purpose of this study is to investigate the above-ground
biomass and nutrient accumulation of 14, 21 and 29 years old
Chamaecyparis formosensis plantations in Ta-Hsueh-Shan area.
Stratified-clip technique was used to obtain the growth data of
sample trees which was selected from various DBH classes of
study plots. The above-ground biomass and nutrient accumulation
of each stand were estimated by allometric equations with DBH
as single independent variable. All the results can be
summarized as follows: 14 years old stand biomass:61.79ton/ha,
N:198.94kg/ha, P:30.93kg/ha, K:203.33kg/ha, Ca:249.87kg/ha,
Mg:42.46kg/ha. 21 years old stand biomass:105.02ton/ha, N:331.48
kg/haa, P:54.95kg/ha, K:286.66kg/ha, Ca:302.16kg/ha, Mg:61.50kg/
ha. 29 years old stand biomass:84.19ton/ha, N:234.95kg/ha,
P:34.07kg/ha, K:171.28kg/ha, Ca:243.07kg/ha, Mg:63.64kg/ha.
Major vertical dry-matter distributions of branch and leaf of
the sampled tree showed that leaf dry-matter was concentrated
in the upper and middle parts of the crown. The largre amount
of mortal branch was significantly left at the bottom of the
crown which makes the prunning operation necessary in order to
upgrade the quality of individual tree. Weibull probability
density function has been proved to be the best description of
diameter distribution of the stand. It may also be used to
estimate biomass of each component of stand. Nutrient
concentration varied considerably between tree tissues. It was
the highest in the needle, the lowest in the stemwood, and
intermediate in the branch bark, stem bark and branch wood.
Because tissue nutrient concentrations exhibited relatively
little change with the stand development, total above-ground
nutrient accumulation followed the dynamic of biomas expansion.
URI: http://hdl.handle.net/11455/66104
Appears in Collections:森林學系

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