Efecto de los hongos micorrícicos arbusculares en el carbono orgánico del suelo en sistemas agrícolas: una aproximación meta-analítica

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Título

Efecto de los hongos micorrícicos arbusculares en el carbono orgánico del suelo en sistemas agrícolas: una aproximación meta-analítica

Autor(es)

Conti, Georgina; Piñeiro, Gervasio

Afiliación(es) del/de los autor(es)

Conti, Georgina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales Argentina.
Conti, Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Piñeiro, Gervasio. Universidad de Buenos Aires. Facultad de Agronomía; Argentina.
Piñeiro, Gervasio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina.

Resumen

This meta-analysis focused on agriculture ecosystems worldwide including both woody and non-woody dominant crop species. We searched on Scopus (last accessed in July 2021) to collect published articles according to our search criteria. Our search terms were: “( TITLE-ABS-KEY ( "soil organic matter" OR "soil organic carbon" OR "particulate organic carbon" OR "mineral associated organic carbon" OR "particulate organic matter" OR "mineral associated organic matter" OR pom OR poc OR maom OR maoc ) AND TITLE-ABS-KEY ( "arbuscular mycorrh*" OR glomal* OR *grsp OR *brsp OR hma ) AND TITLE-ABS-KEY ( crop* OR *cultur* OR farm* OR cultiva* OR agro* ) AND TITLE-ABS-KEY ( pot OR greenhouse OR experiment* OR inoculat* ) )”. We found 118 studies matching these criteria, which were screened according to the selection criteria described below to be included in our compilation. We also included articles cited in the selected papers that could add new information to our review. The articles had to be original research articles performed in agricultural systems; report SOC, particulate organic carbon and/or mineral associated organic carbon and involve both an AM fungi inoculation treatment and a corresponding control without inoculation. We defined the AMF treatment (AMF+) and the control treatment (AMF-) including studies where the application of an AM fungal inoculum represented the AMF+ treatment while the treatment without the application of the inoculum was the corresponding control (AMF-). For that studies that present different crop species or AMF strains, these were included as different trials from the same study. After screening and filtering across a global database, a total of 19 studies were selected, including 62 comparisons (trials) for subsequent analyses (Table 1). From these, we extracted average values with their correspondent variance and sample size (N). Together with this information, auxiliary variables covering plant, microorganisms, soil properties, and experiment-related factors of the studies were also registered.
Increasing soil organic carbon (SOC) stocks in agroecosystems is a major goal to maintain agricultural sustainability and mitigate climate change. Arbuscular mycorrhizal fungi (AMF) can increase crop growth and yield, but studies in agricultural soils have shown that their effects on SOC stocks can be either positive (through soil aggregation and inputs) or negative (through increased mineralization or “priming”). We conducted a meta-analysis to quantitatively evaluate the role of AMF on SOC stocks across several crop species and conditions. We used a dataset comprising 62 trials from 19 studies including field or pot experiments that directly manipulated the mycorrhizal status of plants. We found a strong effect of AMF on SOC stocks, with an average increase of 21.5%. The positive effect of AMF on SOC stocks was consistently observed across a wide range of conditions, including different soil types, crop species, or AMF inoculation sources (single o mixed AMF species). Our results suggest a higher contribution of AMF mediated mechanisms leading to SOC accretion rather than carbon losses. Future studies should evaluate the effects of AMF on SOC fractions to clarify the mechanisms behind its overall contribution to SOC accrual.

Año de publicación

2022

Idioma

español

Formato (Tipo MIME)

application/zip

Clasificación temática de acuerdo a la FORD

Ciencias biológicas

Materia

Ecología; Ciencias Biológicas; Arbuscular mycorrhizal fungi; Agricultural systems; Meta-analysis; Mineral-associated organic carbon; Particulate organic carbon; Soil carbon stocks; Soil organic matter;

Condiciones de uso

Disponible en acceso abierto

Repositorio digital

Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdoba