Malou Oscar pascal, Chevallier Tiphaine, Moulin Esmard Patricia, Sebag D., Rakotondrazafy M. N., Badiane-Ndour N. Y., Thiam A., Chapuis Lardy Lydie. (2023). Measuring the stability of soil organic carbon in Arenosols in the Senegalese Groundnut Basin. Journal of Arid Environments, 213, p. 104978 [13 p.]. ISSN 0140-1963.
Titre du document
Measuring the stability of soil organic carbon in Arenosols in the Senegalese Groundnut Basin
Année de publication
2023
Auteurs
Malou Oscar pascal, Chevallier Tiphaine, Moulin Esmard Patricia, Sebag D., Rakotondrazafy M. N., Badiane-Ndour N. Y., Thiam A., Chapuis Lardy Lydie
Source
Journal of Arid Environments, 2023,
213, p. 104978 [13 p.] ISSN 0140-1963
Soil organic carbon (SOC) contributes to agrosystem productivity. Understanding how farming practices implemented by smallholders affect the levels and distribution of SOC in carbon (C) pools with different stabilities is essential in sub-Saharan Arenosols where SOC mineralization is intense. The stability of SOC was studied by thermal (Therm-C), physical (particulate organic matter >50 mu m, POM-C and fine soil fractions <50 mu m, FF-C), chemical (permanganate-oxidizable carbon, POX-C) and biological (mineralizable C, Min-C) approaches. Soil samples were collected at depths of 0-10 and 10-30 cm in cultivated fields (out- or home-fields) without any input, with millet residues, amended with manure, or with household organic wastes. Globally, average SOC contents were low (<6 g C kg-1). The variability in SOC and C pool contents was sensitive to field management. The different approaches to measuring the stability of SOC did not measure the same fraction of SOC. POM-C and Therm-C were correlated and both explained Min-C similarly, thus suggesting that in these sandy soils, POM-C or Therm-C probably measured comparable properties of the stability of C. The lack of relationships between POX-C and other pools suggested that POX-C encompassed a different nature of SOC while providing complementary information on the biogeochemical stability of SOC.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Pédologie [068]
;
Sciences du monde végétal [076]
Description Géographique
SENEGAL ; ZONE SAHELIENNE ; ZONE TROPICALE
Localisation
Fonds IRD [F B010087624]
Identifiant IRD
fdi:010087624
