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应用生态学报 ›› 2012, Vol. 23 ›› Issue (01): 17-22.

• 研究论文 • 上一篇    下一篇

中亚热带米槠天然林土壤甲烷吸收速率季节变化

陈匆琼1,2,杨智杰1,2,3,谢锦升1,2**,刘小飞1,2,钟小剑1,2   

  1. 1湿润亚热带山地生态国家重点实验室培育基地, 福州 350007;2福建师范大学地理科学学院, 福州 350007;3福建师范大学地理研究所, 福州 350007
  • 出版日期:2012-01-18 发布日期:2012-01-18

Seasonal variations of soil CH4 uptake rate in Castanopsis carlesii forest in mid-subtropical China.

CHEN Cong-qiong1,2, YANG Zhi-jie1,2,3, XIE Jin-sheng1,2, LIU Xiao-fei1,2, ZHONG Xiao-jian1,2   

  1. 1Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China; 2School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;3Institute of Geography, Fujian Normal University, Fuzhou 350007,China
  • Online:2012-01-18 Published:2012-01-18

摘要: 以福建省建瓯市万木林自然保护区米槠天然林为对象,定位观测了土壤甲烷吸收速率(VCH4)的季节变化.结果表明:米槠天然林土壤VCH4的季节变化表现出夏秋季高于冬春季的趋势,最大值(95.13 μg·m-2·h-1)出现在初秋(9月),最小值(9.13 μg·mμg·m-2·h-1)出现在初春(3月).土壤全年均为甲烷汇.随土壤温度和含水量的增加, VCH4分别呈增加和降低趋势,但VCH4与土壤温度和土壤含水量的相关性均不显著.米槠天然林土壤甲烷年通量为3.93 kg·hm-2·a-1,高于全球天然林土壤甲烷年通量的平均水平(2.4 kg·hm-2·a-1)和亚洲地区热带天然林土壤甲烷年通量(2.07 kg·hm-2·a-1),低于亚洲地区温带天然林的土壤甲烷年通量(8.12 kg·hm-2·a-1).

关键词: 中亚热带, 米槠天然林, 土壤甲烷吸收速率, 土壤温度, 土壤含水量

Abstract: A monthly measurement of soil CH4 uptake rate (VCH4) in a natural Castanopsis carlesii forest in Wanmulin Natural Reserve of Fujian Province, East China was conducted from March 2010 to February 2011. The VCH4 showed a pronounced seasonal fluctuation, being higher in summer-autumn than in winter-spring, with the maximum value (95.13 μg·m-2·h-1) in September and the minimum value (9.13μg·m-2·h-1) in March. With the increase of soil temperature and moisture, the VCH4 showed an increasing and a decreasing trend, respectively, but the correlations of the VCH4 with soil temperature and moisture were not significant. The annual soil CH4 flux of the forest (3.93 kg·hm-2·a-1) was higher than the average value of global natural forests (2.4 kg·hm-2·a-1) and of Asian tropical natural forests (2.07 kg·hm-2·a-1), but lower than that of Asian temperate natural forests (8.12 kg·hm-2·a-1).

Key words: mid-subtropics, natural Castanopsis carlesii forest, CH4 uptake rate, soil temperature, soil moisture