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作 者 ：康文星 方海波

期 刊 ：林业科学 1997年 33卷 zk2期 页码：67-73

关键词：杉木人工林；干重热值；生物量；能量；

Keywords:Chinese fir plantation, Thermal value of dry weight, Biomass, Energy,

摘 要 ：本文研究了杉木中心产区和扩大栽培区杉木人工林能量积累和分配规律。结果表明：会同11年生杉木人工林固定能量16833×10⁸J/hm²，朱亭11381×lO⁸J/hm²，能量在林分各组分的分配比大小依次是茎>根>叶>枝；茎中能量分配比，会同大于朱亭，枝叶中能量分配比，朱亭大于会同；林分固定能量值随密度增加而减少；减少的能量主要是减少茎中的积累量；林木固定能量的垂直分布中，地表层和林冠2/3高处分配的能量最多，表明一个系统内，凡是对水分和养分供求最迫切的地方，也是能量流向和聚集最多的地方；朱亭杉木林光合固能的经济效益(对茎材而言)比会同少20％，其枝叶的光合能力只有会同的70％。

Abstract:The energy storage and its distribution in Chinese fir plantations was comparatively studied at Huitong and Zhuting of Hunan Province respectively．The former is in the 0-riginal distribution centre of Chinese fir，the latter is in its enlarged planting areas．The results showed that the energy fixed by the 11—year—old stand at Huitong is 16833×10⁸J/hm²,while only 11381×10⁸J/hm² at Zhuting；Energy distribution in the forest com- ponents is in the following order；stem>root>leaf>branch．Energy stored in stem at Huitong is larger than that at Zhuting，but energy in branch and leaf at Huitong is less than that at Zhuting．The energy fixed by the stand decreased with its density increas-ing，the energy decrease occurred mostly in the stem’s accumulation．The energy vertical distribution of the forest showed that the soil surface layer and 2/3 canopy height take up most of the energy．It indicated that in an ecosystem，where most energy flows to and accumulated in the place where nutrients and water are most needed．In Zhuting stand，the economic value of energy fixed by photosynthesis(of stem) is 20％ less than that in Huitong，and the photosynthetic ability of leaf and branch is only 70％ that of the latter．

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