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长白山四种森林类型凋落物分解动态

刘颖1;武耀祥2;韩士杰3;林鹿1   

  1. 1华南理工大学轻工与食品学院制浆造纸工程国家重点实验室, 广州 510640; 2长白山国家自然保护区管理局, 吉林安图 133613;3中国科学院沈阳应用生态研究所, 沈阳 110016
  • 收稿日期:2008-06-03 修回日期:1900-01-01 出版日期:2009-03-10 发布日期:2009-03-10

Litterfall decomposition in four forest types in Changbai Mountains of China.

LIU Ying1;WU Yao-xiang2;HAN Shi-jie3;LIN Lu1   

  1. 1State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China;2Bureau of Changbai Mountains Nature Reserve, Antu 133613, Jilin, China;3Insititute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2008-06-03 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10

摘要: 2003年5月—2004年9月在长白山自然保护区北坡4个森林类型阔叶红松林、红松云冷杉林、岳桦云冷杉林和岳桦林内,利用凋落物原位减少法对4种森林类型的凋落物分解动态进行了研究。结果表明,凋落物现存量最大的为红松云冷杉林,依次为阔叶红松林、岳桦云冷杉林、岳桦林;凋落物分解速率与时间均呈指数关系,凋落物年分解常数为0.25~0.47,分解95%所需时间为18~39年,其中阔叶红松林凋落物年分解常数最大,依次为岳桦林、红松云冷杉林、岳桦云冷杉林。同一类型森林中,不同植物组分的年分解系数不同,一般是阔叶最大,针叶最小。

关键词: 水稻, 化感作用, 抑草效应, 农艺性状, 品种

Abstract: By the method of in situ litterfall lessening, the litterfall decompos ition in four forest types (broadleaf-Korean pine forest, Korean pine and spruc e-fir mixed forest, Betula ermanii and spruce-fir mixed forest, and B. e rmanii forest) on the north slope of Changbai Mountains Nature Reserve was stu died from May 2003 to September 2004. The results showed that Korean pine and sp ruce-fir mixed forest had the largest quantity of standing litterfall, followed by broadleaf-Korean pine forest, B. ermanii and spruce-fir mixed forest, and B. ermanii forest. There existed an exponential relationship between lit terfall decomposition rate and time. The annual decomposition rate of the litter fall in different forest types ranged from 25% to 47%, being the largest in broa dleaf-Korean pine forest, followed by in B. ermanii forest, Korean pine and spruce-fir mixed forest, and B. ermanii and spruce-fir mixed forest, and the time for decomposing 95% of the litterfall took about 18 to 39 years. In the same forest types, the annual decomposition rate of different plant components diff ered obviously, generally with broad leaf being the largest and conifer being th e least.

Key words: Oryza sativa, Allelopathy, Agronomic character, Weed-inhibiting effect, Variety