六龜台灣杉人工林碳和氮的累積和分布

Carbon and Nitrogen Accumulation and Distribution in Taiwania Plantations of the Liukuei Experimental Forest

林國銓(Kuo-Chuan Lin) ； 黃菊美(Chu-Mei Huang) ； 王巧萍(Chiao-Ping Wang) ； 張乃航(Nan-Hang Chang)

《台灣林業科學》 19卷3期 (2004/09) Pp. 225-235

https://doi.org/10.7075/TJFS.200409.0225

摘要

估算林試所六龜試驗林的台灣杉人工林20和27年生兩林分的生物量，並推估其碳和氮的分布與累積。以兩林分28株樣木的胸高直徑所建立的自然對數迴歸式，樹體各部位及總生物量皆呈顯著相關。20年生林木生物量為204 ton ha^(-1)，27年生則為254 ton ha^(-1)，遠高於疏伐過的同齡林。全林分生物量大部分集中在林木。全林分碳和氮則主要分布在土壤，分別佔全林分的46~59和83~88%；土壤碳和氮皆集中在0~15cm土層。由林木材積轉換成生物量的平均係數為0.42(Mg m^(-3))，而材積轉換成地上部碳累積量的平均係數為0.22(Mg m^(-3))。

關鍵字

台灣杉 ； 生物量 ； 自然對數迴歸式 ； 碳累積量 ； 氮累積量

並列摘要

Two Taiwania (Taiwania cryptomerioides Hayata) plantations aged 20 and 27 yr in the Liukuei Experimental Forest were selected in order to estimate the biomass, carbon, and nitrogen accumulation and distribution. According to the allometric equation established by data from 28 harvested sample trees, the biomass of each component and the total biomass of trees were highly significantly related to the diameter at breast height (dbh). The estimated Taiwania biomass values were 204 and 254 ton ha^(-1) for the 20- and 27-yr-old stands, respectively, which were higher than values of the thinned stand at the same ages. The major biomass of the stand was in Taiwania. Carbon and nitrogen of the stand accumulated primarily in the soil, comprising 46~59% and 83~88% of the total amount, respectively. In soil the majority of the carbon and nitrogen was stored in the first 0~15cm of depth. The average conversion coefficient from timber volume to biomass was 0.42(Mg m^(-3)), while the average conversion coefficient from timber volume to aboveground carbon storage was 0.22(Mg m^(-3)).

並列關鍵字

Taiwania ； biomass ； allometric equation ； carbon accumulation ； nitrogen accumulation