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題 名 | 不同栽植密度與疏伐度柳杉立木及其木製品固碳量與碳排放量=The Carbon Storage and Carbon Emission of Tree and Its Sawn Lumber Grown in Different Planting Density and Thinning Treatment Japanese-cedar in Taiwan |
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作 者 | 陳勁豪; 林振榮; 詹明勳; 徐光平; 王松永; | 書刊名 | 林產工業 |
卷 期 | 26:1 2007.03[民96.03] |
頁 次 | 頁45-52 |
分類號 | 436.713 |
關鍵詞 | 柳杉; 固碳量; 二氧化碳; 耗電量; 製材率; Japanese-cedar; Cryptomeria japonica; Carbon storage; Carbon dioxide; Emission; Energy consumption; Sawn-lumber yield; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究探討38年生柳杉造林木於生長期間之碳吸存,以及立木砍伐製成製材品後木材固碳的變化,得知本試驗林分柳杉造林木立木每公頃材積為354.40 m^3,換算為平均每年每公頃的樹幹固碳量約2.30 ton,當換算成二氧化碳的吸存,平均每年每公頃約為8.50 ton。在不同栽植密度與疏伐度林分所得原木材積大小有次述趨勢,即:重度疏伐(第3區)>中度疏伐(第4、5區)>弱度疏伐(第1、2區)>未處理區(第6區)。其中未處理區的原木材積特別小,只有0.71 m^3。由各林分所得原木之整體製材率有次述趨勢,即:第1區>第2區>第6區>第3區>第5區>第4區。整體平均製材率為39%。整體製材品之總材積為3.02 m^3,其固定之碳重為466.70kg,整體之總消耗電量而換算成排放之碳素量為8.93 kg,淨固碳重為457.77 kg,由此可知。平均每1 m^3材積可固定147.90 kg之碳量。 |
英文摘要 | The main objective of this study was to explore the amount of carbon storage of Japanese-cedar during its 38-year life cycle. The standing volume of 38-year-old Japanese-cedar was 354.40 m^3/ha and it also represented 2.30 tons fixed carbon per hectare per year. In other word, the annual carbon dioxide storage was 8.50 ton/ha. In general, the standing volume of log was greatly effected by planting density and thinning treatment the volume of log, the trend was as following: heavy thinning (type 3)> middle thinning (type 4 and 5)> light thinning (type 1 and 2)> control (type 6). There was the smallest volume which was only 0.71 m3 of logs in control site (type 6). In terms of sawn-lumber yield, the trend was as follows: type1> type2> type6> type3> type5> type4. The average sawn-lumber yield was 39%. The total lumber volume was 3.02 m^3. At this point, 3.02 m^3 lumbers represented 466.70 Kg fixed carbon. Total electricity consumed was equal to 8.93 Kg carbon released. Net carbon storage was 457.77 Kg. For this reason, every m^3 of lumber had 147.90 Kg carbon fixed. |
本系統中英文摘要資訊取自各篇刊載內容。