Chevallier Tiphaine auteur aut IRD Blanchart Eric auteur aut IRD Toucet Joële auteur aut IRD Bernoux Martial auteur aut IRD text journalArticle eng text/pdf born digital access A method to estimate the amount of soil organic carbon (SOC) physically protected within macroaggregates (>200 mu m) consists of crushing soil samples and measuring the following SOC mineralization increase. This study investigated the effect of grinding the plant residues during soil crushing on the calculated amount of the protected SOC on two tropical soils (Arenosol and Ferralsol). Incubations of crushed and uncrushed soil samples amended with ground or unground plant residues were conducted. Our results showed that soil crushing increased SOC mineralization and that the presence of plant residues enhanced soil respiration also. The plant residues of the two soils had different decomposition rates, but grinding plant residues did not increase the amounts of cumulative carbon (C) mineralized after the 28 days of the experiment. We propose that the extra C mineralized after soil crushing is due to the breakdown of the soil structure and not to the grinding of plant residues. specialized Mineralization plant residues soil crushing soil organic matter protection tropical soil 068 42 13 1537-1543 2011 0010-3624 https://www.documentation.ird.fr/hor/fdi:010080691 10.1080/00103624.2011.581722 0010-3624 [F B010080691] https://www.documentation.ird.fr/hor/fdi:010080691 https://www.documentation.ird.fr/intranet/publi/depot/2020-12-23/010080691.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2012-05-04 2021-02-08 fdi:010080691 fre