Thoumazeau A. auteur aut IRD Chevallier Tiphaine auteur aut IRD Baron V. auteur aut IRD Rakotondrazafy N. auteur aut IRD Panklang P. auteur aut IRD Marichal R. auteur aut IRD Kibblewhite M. auteur aut IRD Sebag David auteur aut IRD Tivet F. auteur aut IRD Bessou C. auteur aut IRD Gay F. auteur aut IRD Brauman Alain auteur aut IRD text journalArticle eng text/pdf born digital access The assessment of the impacts of land-use and management on soil organic carbon (SOC) dynamics is a major environmental concern, as the soil carbon cycle underpins key ecosystem services. However, assessments based on short-term SOC dynamics face methodological and experimental difficulties. Hurisso et al. (2016) proposed a method to assess SOC dynamics by coupling two methods: Permanganate Oxidizable Carbon (POXC) and Basal Soil Respiration (BSR). This method has been used in laboratory on dried and re-wetted soil samples from temperate regions mainly. In our study, we adapted this method to the field and proposed a cost-effective in-field indicator combining the POXC and in situ Basal Soil Respiration (SituResp (R) method). We tested the indicator at four study sites (n = 169 points) within various tropical land-use and management contexts based on rubber, soybean and oil palm cropping systems respectively in Thailand, Cambodia and Indonesia. The results demonstrated the relevance, sensitivity and robustness of the POXC-SituResp (R) indicator to characterize the impact of a gradient of disturbance on SOC dynamics. The results also highlighted the potential of conservation agriculture (no-tillage and crops residues) and compost amendments to accumulate SOC. Rock-Eval (R) analysis showed that POXC-SituResp (R) indicator is negatively linked to excess of potentially mineralizable labile carbon. Carbon pools targeted by the POXC were specified by Rock-Eval (R) pyrolysis measurements to be a rather thermal resistant pool of SOC. Our study confirms that the integrated indicator based on POXC and BSR assess a relative carbon stabilization of SOC pools. This indicator can be measured in the field by a rapid and cost-effective method. specialized In-field indicator Soil carbon dynamics Land management Tropical conditions POXC SituResp (R) THAILANDE CAMBODGE INDONESIE CHACHOENGSAO KHON KAEN BOS KHNOR SUMATRA ILE RIAU PROVINCE 068 076 020 375 art. 114496 [10 p.] 2020 0016-7061 https://www.documentation.ird.fr/hor/fdi:010079400 10.1016/j.geoderma.2020.114496 0016-7061 [F B010079400] https://www.documentation.ird.fr/hor/fdi:010079400 https://www.documentation.ird.fr/intranet/publi/2020/08/010079400.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-09-17 2025-02-24 fdi:010079400 fre