自然资源学报

自然资源学报 ›› 2016, Vol. 31 ›› Issue (7): 1114-1126.doi: 10.11849/zrzyxb.20150791

• 资源经济 • 上一篇    下一篇

红椿凋落叶全碳释放的林窗效应

李勋a, 张健a, b, c, 杨万勤a, b, c, 张艳a, 张明锦a, 刘华a, 刘洋a, b, c*, *   

  1. 四川农业大学 a. 林学院生态林业研究所,成都 611130;
    四川农业大学 b. 生态林业工程重点实验室,成都 611130;
    四川农业大学 c. 长江上游生态安全协同创新中心,成都 611130
  • 收稿日期:2015-07-25 修回日期:2015-11-25 出版日期:2016-07-20 发布日期:2016-07-20
  • 作者简介:李勋（1990- ）,男,四川遂宁人,硕士研究生,主要从事退化人工林生态恢复与重建研究。E-mail:502780405@qq.com *通信刘洋（1979- ）,女,博士,副研究员,主要从事凋落物分解及土壤微生物研究。E-mail:sicauliuyang@163.com
  • 基金资助:
    国家自然科学基金项目（31370628）; 国家科技支撑计划项目（2011BAC09B05）; 四川省科技支撑计划项目（2013SZ0067,2011SZ0239）; 四川省科技厅应用基础项目（2012JY0047）; 四川省教育厅科技创新团队计划项目（11TD006）

Effect of Forest Gap on Carbon Release of Toona Ciliata Leaf Litter

LI Xuna, ZHANG Jiana, b, c, YANG Wan-qina, b, c, ZHANG Yana, ZHANG Ming-jina, LIU Huaa, LIU Yanga, b, c   

  1. a. Institute of Ecology &
    Forestry, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China;
    b. Key Laboratory of Forestry Ecological Engineering in Sichuan, c. Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Sichuan Agricultural University, Chengdu 611130, China;
    c. Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Sichuan Agricultural University, Chengdu 611130, China
  • Received:2015-07-25 Revised:2015-11-25 Online:2016-07-20 Published:2016-07-20
  • Supported by:
    National Natural Science Foundation of China, No.31370628 ;The Key Sci-tech Project of China, No.2011BAC09B05 The Sci-tech Projects of Sichuan, No.2013SZ0067 and 2011SZ0239; The Project of Applied & Basic Research of Science and Technology Department of Sichuan, No.2012JY0047; The Project of Department of Education Science and Technology Innovation Team Program of Sichuan, No.11TD006

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摘要： 为了调整低山丘陵区低效林林分结构,探明马尾松人工林不同林窗下凋落物的全碳释放规律,论文以长江上游低山丘陵区人为采伐形成的马尾松（Pinus massoniana）人工林7种不同大小林窗（G1：100 m2,G2：225 m2,G3：400 m2,G4：625 m2,G5：900 m2,G6：1 225 m2,G7： 1 600 m2）为研究对象,以林下为对照,研究了乡土阔叶树种红椿（Toona ciliata）凋落叶近1 a的全碳释放率和全碳释放速率（每30 a）。结果表明：1）相对小型（100~200 m2）和大型（1 225~ 1 600 m2）林窗以及林下,中型（400~625 m2）林窗更能促进凋落叶全碳的释放;2）全碳释放速率表现出先快后慢的变化趋势,在分解中后期（90~270 d）,出现碳的富集现象;3）凋落物全碳的释放受林窗大小、位置、分解时间的交互作用,分解时间对红椿凋落叶的全碳释放率影响极显著（P < 0.01）,林窗大小对全碳释放有显著影响（P < 0.05）,而林窗内不同位置（中心和边缘）对凋落叶碳释放无显著影响;4）凋落物分解温度、含水率和全碳释放率、质量损失速率表现出极显著正相关（P < 0.01）。

关键词: 凋落叶, 红椿, 林窗大小, 马尾松人工林, 碳释放

Abstract: In order to readjust the structure of pine forest and explore the regularity of litter carbon release in forest gaps of Pinus massoniana plantation, a field litterbag experiment was set up in thinning Pinus massoniana plantation with seven different sizes of forest gaps (G1: 100 m2, G2: 225 m2, G3: 400 m2, G4: 625 m2, G5: 900 m2, G6: 1 225 m2, G7: 1 600 m2). The effect of the sized of forest gap on carbon release rate of Toona ciliata leaf litter was studied. The results indicated that: 1) Compared with the small size (100-200 m2) and the large size (1 225-1 600 m2) of forest gaps, the medium sized (400-625 m2) forest gaps promoted the carbon release. 2) The carbon release rate in early period of the first 30 days is higher than in the following periods. The carbon release rate shows that after a decomposition of 90 days, there is a phenomenon of carbon concentration enrichment. 3) The carbon release is affected by the gap size, within-gap location, and decomposition time as well. Decomposition time has extremely significant effect on carbon release (P < 0.01), and gap size also has significant effect on carbon release (P < 0.05). However, there is no significant effect of within-gap location on carbon release. 4) The temperature and moisture have extremely significant positive correlation (P < 0.01) with carbon release rate and mass loss rate.

Key words: carbon release, gap size, leaf litter, Pinus massoniana plantations, Toona ciliata

中图分类号: 

  • S718.55