@article{fdi:010088883, title = {{S}hort-term {PE} generation processes in the soils of a farmer plots network in the {M}adagascar highlands : actors and drivers}, author = {{R}azanamalala, {K}. and {R}azafimbelo, {T}. and {M}aron, {P}. {A}. and {R}anjard, {L}. and {P}r{\'e}vost-{B}our{\'e}, {N}. {C}. and {D}equiedt, {S}. and {B}ecquer, {T}hierry and {T}rap, {J}ean and {B}lanchart, {E}ric and {B}ernard, {L}aetitia}, editor = {}, language = {{ENG}}, abstract = {{C}arbon sequestration in agricultural soils, through the accumulation of high-quality organic matter, represents great potential to mitigate climate change and simultaneously improve soil fertility. {S}uch a challenge is particularly important and relevant in developing tropical countries like {M}adagascar, where soil carbon storage is vulnerable to climatic variations and where fertilization is generally applied through amendments in organic matter of various origins. {T}he priming effect ({PE}) is considered here as the stimulation of the mineralization of soil organic matter ({SOM}) by a supply of fresh organic matter ({FOM}). {PE} results from different microbial processes driven by specific biotic and abiotic parameters. {D}epending on the processes involved, it has been suggested that {PE} could either counteract {SOM} accumulation or promote it. {T}he objective of the present study was to explore the relationships between certain agricultural practices (type of crop, quality of fertilization, association with trees), the potential intensity of {PE}, as well as several abiotic (texture, quantity and quality {SOM}, nutrient enrichment) a1nd biotic (biomass and phylogenetic composition of microbial communities) factors which have been proposed in the literature as specific determinants of the different {PE} generation mechanisms. {T}he soils for this study come from a network of farms in a commune in the {H}ighlands of {M}adagascar. {T}he {PE}, generated by a supply of 13{C}-enriched wheat straw, could not directly correlate with agricultural treatments. {H}owever, several indirect correlations could be found via several specific abiotic and microbial determinants that are discussed in terms of soil fertility restoration.}, keywords = {{F}erralsols ; organic fertilization ; priming effect ; smallholder farming ; {C} sequestration ; soil organic matter ; {MADAGASCAR}}, booktitle = {}, journal = {{M}icrobiology {R}esearch}, volume = {14}, numero = {4}, pages = {1702--1719}, year = {2023}, DOI = {10.3390/microbiolres14040117}, URL = {https://www.documentation.ird.fr/hor/fdi:010088883}, }