naa a22 4500 510737404 CHVBK 20180411083015.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11284-013-1079-0 doi (NATIONALLICENCE)springer-10.1007/s11284-013-1079-0 Soil CO2 efflux and soil carbon balance of a tropical rubber plantation [Elektronische Daten] [Duangrat Satakhun, Frédéric Gay, Naruenat Chairungsee, Poonpipope Kasemsap, Pisamai Chantuma, Sornprach Thanisawanyangkura, Philippe Thaler, Daniel Epron] Natural rubber is a valuable source of income in many tropical countries and rubber trees are increasingly planted in tropical areas, where they contribute to land-use changes that impact the global carbon cycle. However, little is known about the carbon balance of these plantations. We studied the soil carbon balance of a 15-year-old rubber plantation in Thailand and we specifically explored the seasonal dynamic of soil CO2 efflux (F S) in relation to seasonal changes in soil water content (W S) and soil temperature (T S), assessed the partitioning of F S between autotrophic (R A) and heterotrophic (R H) sources in a root trenching experiment and estimated the contribution of aboveground and belowground carbon inputs to the soil carbon budget. A multiplicative model combining both T S and W S explained 58% of the seasonal variation of F S. Annual soil CO2 efflux averaged 1.88kgCm−2year−1 between May 2009 and April 2011 and R A and R H accounted for respectively 63 and 37% of F S, after corrections of F S measured on trenched plots for root decomposition and for difference in soil water content. The 4-year average annual aboveground litterfall was 0.53kgCm−2year−1 while a conservative estimate of belowground carbon input into the soil was much lower (0.17kgCm−2year−1). Our results highlighted that belowground processes (root and rhizomicrobial respiration and the heterotrophic respiration related to belowground carbon input into the soil) have a larger contribution to soil CO2 efflux (72%) than aboveground litter decomposition. The Ecological Society of Japan, 2013 Soil respiration nationallicence Rubber plantation nationallicence Partitioning nationallicence Seasonal variation nationallicence Root biomass nationallicence Satakhun Duangrat Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut Gay Frédéric Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut Chairungsee Naruenat Department of Agriculture, Office of Agricultural Research and Development Region 1, 50200, Chiang Mai, Thailand aut Kasemsap Poonpipope Department of Horticulture, Faculty of Agriculture, Kasetsart University, 10900, Bangkok, Thailand aut Chantuma Pisamai Chachoengsao Rubber Research Centre, Rubber Research Institute of Thailand, 24160, Chachoengsao, Thailand aut Thanisawanyangkura Sornprach Department of Botany, Faculty of Science, Kasetsart University, 10900, Bangkok, Thailand aut Thaler Philippe Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut Epron Daniel CIRAD, UMR Eco&sols, 34060, Montpellier, France aut Ecological Research Springer Japan 28/6(2013-11-01), 969-979 0912-3814 28:6<969 2013 28 11284 https://doi.org/10.1007/s11284-013-1079-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-013-1079-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Satakhun Duangrat Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut NATIONALLICENCE 700 1- Gay Frédéric Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut NATIONALLICENCE 700 1- Chairungsee Naruenat Department of Agriculture, Office of Agricultural Research and Development Region 1, 50200, Chiang Mai, Thailand aut NATIONALLICENCE 700 1- Kasemsap Poonpipope Department of Horticulture, Faculty of Agriculture, Kasetsart University, 10900, Bangkok, Thailand aut NATIONALLICENCE 700 1- Chantuma Pisamai Chachoengsao Rubber Research Centre, Rubber Research Institute of Thailand, 24160, Chachoengsao, Thailand aut NATIONALLICENCE 700 1- Thanisawanyangkura Sornprach Department of Botany, Faculty of Science, Kasetsart University, 10900, Bangkok, Thailand aut NATIONALLICENCE 700 1- Thaler Philippe Center of Thai-French Cooperation on Higher Education and Research, Kasetsart University, 10900, Bangkok, Thailand aut NATIONALLICENCE 700 1- Epron Daniel CIRAD, UMR Eco&sols, 34060, Montpellier, France aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/6(2013-11-01), 969-979 0912-3814 28:6<969 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer