华东师范大学学报(自然科学版) ›› 2011, Vol. 2011 ›› Issue (4): 53-60.

• 环境工程 地理学 • 上一篇    下一篇

浙江天童森林退化和受损对土壤呼吸的影响

郭 明1， 康 蒙1， 仲 强1， 王希华1,2， 达良俊1,2， 阎恩荣1,2   

  1. 1.华东师范大学 环境科学系，上海 200062； 2.浙江天童森林生态系统国家野外科学观测研究站,浙江 宁波 315114
  • 收稿日期:2010-07-01 修回日期:2010-10-01 出版日期:2011-07-05 发布日期:2011-11-12

Impacts of forest degradation and damage on soil respiration in the Tiantong region, Zhejiang Province

GUO Ming 1, KANG Meng 1, ZHONG Qiang 1, WANG Xi-hua 1,2,DA Liang-jun 1,2, YAN En-rong 1,2   

  1. 1. Department of Environment Science, East China Normal University, Shanghai 200062, China; 2. Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo Zhejiang 315114, China
  • Received:2010-07-01 Revised:2010-10-01 Online:2011-07-05 Published:2011-11-12

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摘要： 以常绿阔叶林顶级群落为参照，选择了常绿阔叶林亚顶极群落、针叶林、灌丛和灌草丛代表不同退化类型；同时，以4种人工采伐处理代表常绿阔叶林不同受损程度，分别研究了不同退化和受损程度影响下，土壤的呼吸速率及影响因素.结果表明：(1）土壤呼吸速率具有明显的季节动态；(2）土壤呼吸速率分别在常绿阔叶林顶极群落与灌草丛最高，其次分别为针叶林和灌丛，常绿阔叶林亚顶极群落最低；(3）不同受损程度常绿阔叶林土壤呼吸速率无显著差异；(4）影响土壤呼吸速率的决定性因子为土壤C/N和pH，但在退化初期为土壤C/N，在退化后期为土温.可以认为，常绿阔叶林退化过程中控制土壤呼吸速率变化的主要因素逐步由生物因素向非生物因素转变.

关键词: 森林退化, 土壤性质, 碳汇, 碳源, 碳循环

Abstract: This paper chose climax evergreen broadleaf forests (EBLF) as a reference, then selected sub-climax forests, secondary coniferous forests, shrubs and grassland to represent different stages of forest degradation, and 4 logging stands to denote forests damage intensity, in the Tiantong region, Zhejiang province. To understand the impacts of EBLF degradation and damage on soil respiration, soil respiration rate and associated influencing factors were measured among above forests. The results showed that: (1) there was a pronounced seasonal pattern of soil respiration among forests; (2) soil respiration rate was the highest in climax EBLF and the grassland, intermediate in coniferous forests and shrub lands, and the lowest in sub-climax EBLF; (3) the logging did not affect soil respiration rate along the forest damage intensity; and (4) soil respiration was determined by soil C/N ratio and soil pH through forest degradation series; specifically, the main factor in the early stage was soil C/N ratio, and in the later stage of degradation was soil temperature. It was concluded that the controlling factor of soil respiration was shifted from biological-based to abiotic-based orientations, through forest degradation.

Key words: forest degradation, soil properties, carbon sink, carbon source, carbon cycling

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