文献类型：期刊文献

英文题名：Soil Carbon Dioxide Fluxes from Three Forest Types of the Tropical Montane Rainforest on Hainan Island, China

作者：Jiang, Xinhua[1,2,9] Chen, Huai[2,3,4] Peng, Changhui[5,6] Li, Yide[7] He, Yixin[2,3,4] Chen, Dexiang[7] Lin, Mingxian[7] Hu, Ji[2,5] Ma, Tianli[2,5] Liu, Liangfeng[2,5] Liu, Xinwei[2,3,4] Xia, Miao[8,9] Liu, Yinggao[1]

第一作者：Jiang, Xinhua

通信作者：Liu, YG[1];Chen, H[2]

机构：[1]Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Peoples R China;[2]Chinese Acad Sci, Zoige Peatland & Global Change Res Stn, Hongyuan 624400, Peoples R China;[3]Chinese Acad Sci, Chengdu Inst Biol, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Peoples R China;[4]Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China;[5]Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Coll Forestry, Yangling 712100, Peoples R China;[6]Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal, PQ C3H 3P8, Canada;[7]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[8]Sichuan Agr Univ, Coll Life Sci, Chengdu 611130, Peoples R China;[9]Res Insititute Forestry Sci, Kangding 626000, Garze Tibetan A, Peoples R China

年份：2016

卷号：227

期号：6

外文期刊名：WATER AIR AND SOIL POLLUTION

收录：;EI(收录号：20162302464674);Scopus(收录号：2-s2.0-84971251126);WOS:【SCI-EXPANDED(收录号:WOS:000377456000045)】；

基金：This study was supported by 100 Talents Program of The Chinese Academy of Sciences, Program for New Century Excellent Talents in University (NCET-12-0477), the National Natural Science Foundation of China (nos. 31100348 and 41201205), International S&T Cooperation Program of China (S2013GI0408), and China Qianren Project. The authors give special thanks to Ms. Wan Xiong for her editing and valuable comments on the manuscript.

语种：英文

外文关键词：Tropical montane rainforest; Plantation; Soil CO2 fluxes; Soil temperature; Temporal and spatial variation

摘要：Tropical forests play an important role in carbon cycle. However, the temporal and spatial variation in soil carbon dioxide (CO2) emission of tropical forest remains uncertain, especially near the Tropic of Cancer. In this research, we studied the annual soil CO2 fluxes from three tropical montane rainforests on the Hainan Island of China (pristine montane rainforest, PF; secondary montane rainforest, SF; and Podocarpus imbricatus plantation, PP). The results showed a lower annual average soil CO2 flux as 6.85 +/- 0.52 Mg C-CO2 ha-1 (9.17 Mg C-CO2 ha(-1) in the wet season and 4.50 Mg C-CO2 ha(-1) in the dry season). The CO2 fluxes exhibited obviously seasonal variation during the study period. Among the three forest types, PF had the highest average CO2 flux rate of 317.77 +/- 147.71 mg CO2 m(-2) h(-1) (433.08 mg CO2 m(-2) h(-1) in the wet season and 202.47 mg CO2 m(-2) h(-1) in the dry season), followed by PP of 286.84 +/- 137.48 mg CO2 m(-2) h(-1) (367.12 mg CO2 m(-2) h(-1) in the wet season and 206.56 mg CO2 m(-2) h(-1) in the dry season) and SF of 255.09 +/- 155.26 mg CO2 m(-2) h(-1) (351.48 mg CO2 m-2 h(-1) in the wet season and 155.71 mg CO2 m(-2) h(-1) in the dry season). We found between CO2 fluxes and soil temperature a highly significant linear relation (P < 0.01) at 5 cm depth and a highly significant exponential correlation (P < 0.01) at 10 cm depth for all three forest types; a significant linear relation (P < 0.05) between CO2 fluxes and soil moisture content was found for SF and PF, but not for PP (P > 0.05). The CO2 flux was significantly correlated (P < 0.05) with water-filled pore space only for PF. In conclusion, our results suggested soil CO2 fluxes in the three forest types that exhibit obviously spatial and temporal variation, and the temperature is the major factor affecting soil CO2 fluxes from this region.