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生态学杂志 ›› 2011, Vol. 30 ›› Issue (01): 66-71.

• 研究报告 • 上一篇    下一篇

采伐木对森林碳储量的影响

叶雨静1,2,于大炮1,王 玥1,2,3,周旺明1,丁 宏1,王庆伟1,2,王绍先4,代力民1**   

  1. 1中国科学院沈阳应用生态研究所,沈阳 110016;2中国科学院研究生院,北京 100049;3沈阳建筑大学管理学院,沈阳 110168;4吉林省长白山科学研究院,吉林安图,133613
  • 出版日期:2011-01-08 发布日期:2011-01-08

Effects of harvested wood products on forest carbon storage.

YE Yu-jing1,2, YU Da-pao1, WANG Yue1,2,3, ZHOU Wang-ming1, DING Hong1, WANG Qing-wei1,2, WANG Shao-xian4, DAI Li-min1**   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China|2Graduate University of Chinese Academy of Sciences, Beijing 100049, China|3Management School, Shenyang Jianzhu University, Shenyang 110168, China|4Institnte of Academy Sciences of Changbai Moamtain Antu, 133613, Jilin, China
  • Online:2011-01-08 Published:2011-01-08

摘要: 森林是陆地生态系统中最大的碳库。在全球变暖背景下,有关林业管理对森林碳库的影响引起各国科学家的日益关注。目前国内大多数文献都将森林采伐木碳库视为当年排放,而实际上采伐木能长时间储存碳。本文根据利用方式和采伐习惯,将采伐木按使用方式分为:1)DBH≤6 cm为采伐剩余物置于林内;2)DBH>6 cm为实木产品和纸制产品。以长白山林区典型地带性植被阔叶红松林为对象,通过调查采伐前后乔木组成的变化,根据采伐木碳库实际排放情况,研究了采伐前后森林碳储量的动态变化。结果表明:留于林内采伐剩余物为1.1 t C·hm-2,排放速度由大变小,全部排放时间80年;实木产品碳储量为20.56 t C·hm-2,前80年累计排放20.07 t C·hm-2(97.71%);纸制产品为3.63 t C·hm-2,前7年累计排放3.45 t C·hm-2(95.13%)。若将采伐木碳库视为当年排放,则碳库采伐后20年才能达到采伐前的水平;而考虑采伐木碳库实际排放速率,碳库储量则一直大于采伐前水平。因此,将采伐木碳库实际排放列入考虑,有利于合理估算我国森林碳储量,对正确评价我国森林碳汇功能具有积极意义。

关键词: 灰色模型, 营养物质, 叶绿素a, 浮游植物, 赤潮, 大亚湾

Abstract: Forest is the largest carbon (C) pool in terrestrial ecosystem. Under the background of global warming, the influence of forest management on the C pool is increasingly drawing the attention of scientists all over the world. Most of the literatures in China consider that the harvested wood products (HWP) discharge C at current year, but actually, the C in HWP can be deposited for a long time. According to the usage and harvesting practices of HWP, the HWP were divided as 1) harvested residues (DBH ≤6 cm), and 2) solid wood products and paper products (DBH >6 cm). This paper investigated the DBH and tree species composition before and after harvesting in the broadleaved-Korean pine mixed forests in Changbai Mountain, and studied the dynamic changes of the forest C storage, based on the actual emission of C from HWP. The results showed that the C storage of harvested residues was 1.1 t C, and the C emission speed changed from fast to slow. The total C emission would last over 80 years. The C storage of solid wood products was 20.56 t C, and the cumulated C emission in 80 years reached 20.07 t C (97.71%). The C storage of paper products was 3.63 t C, and the cumulated C emission would reach 3.45 t C (95.13%) in the first 7 years. If the C emission from HWP was considered at current year, the forest C pool would take 20 years to reach the level before harvesting; if considering the actual C emission from HWP, the forest C pool would be always larger than the level before harvesting. Therefore, it would be reasonable and meaningful to consider the actual C emission from HWP so as to accurately estimate the forest C storage in China.

Key words: Grey model, Nutrients, Chlorophyll a, Phytoplankton, Red tide, Daya bay