title: [Seasonal variations of soil CH4 uptake rate in Castanopsis carlesii forest in mid-subtropical China].
abstract: A monthly measurement of soil CH4 uptake rate (V(CH4)) 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 microg x m(-2) x h(-1)) in September and the minimum value (9.13 microg x m(-2) x h(-1)) in March. With the increase of soil temperature and moisture, the V(CH4) showed an increasing and a decreasing trend, respectively, but the correlations of the V(CH4) with soil temperature and moisture were not significant. The annual soil CH4 flux of the forest (3.93 kg x hm(-2) x a(-1)) was higher than the average value of global natural forests (2.4 kg x hm(-2) x a(-1)) and of Asian tropical natural forests (2.07 kg x hm(-2) x a(-1)), but lower than that of Asian temperate natural forests (8.12 kg x hm(-2) x a(-1)).
authors.affiliation: Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China. ccongq@126.com
authors.forename: Cong-Qiong
authors.initials: CQ
authors.lastname: Chen
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Yang
authors.forename: Jin-Sheng
authors.initials: JS
authors.lastname: Xie
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Liu
authors.forename: Xiao-Jian
authors.initials: XJ
authors.lastname: Zhong
mesh_terms: D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D008697:Methane / Q000032:analysis*; D012621:Seasons; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014197:Trees / Q000254:growth & development / Q000378:metabolism*; D014329:Tropical Climate
chemical_list: D012987:Soil; D012989:Soil Pollutants; D008697:Methane