Microbial processing of plant remains is co-limited by multiple nutrients in global grasslands

Microbial processing of aggregate-unprotected organic matter inputs is key for soil fertility, long-term ecosystem carbon and nutrient sequestration and sustainable agriculture. We investigated the effects of adding multiple nutrients (nitrogen, phosphorus and potassium plus nine essential macro- an...

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Detalhes bibliográficos
Autores: Ochoa Hueso, Raúl, Borer, Elizabeth, Seabloom, Eric, Hobbie, Sarah E., Risch, Anita C., Collins, Scott L., Alberti, Juan, Bahamonde, Héctor Alejandro, Brown, Cynthia S., Caldeira, Maria C., Daleo, Pedro, Dickman, Chris R., Ebeling, Anne, Eisenhauer, Nico, Esch, Ellen H., Eskelinen, Anu, Fernández, Victoria, Güsewell, Sabine, Gutierrez Larruga, Blanca, Hofmockel, Kirsten, Laungani, Ramesh, Lind, Eric, López, Andrea, McCulley, Rebecca L., Moore, Joslin L., Peri, Pablo Luis, Power, Sally A., Price, Jodi N., Prober, Suzanne M., Roscher, Christiane, Velasco Ayuso, Sergio
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/141720
Acesso em linha:http://hdl.handle.net/11336/141720
Access Level:acceso abierto
Palavra-chave:CARBON CYCLING AND SEQUESTRATION
DECOMPOSITION
EUTROPHICATION
FERTILIZATION
MICROBIAL ACTIVITY
NUTNET
NUTRIENT (CO-)LIMITATION
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
Descrição
Resumo:Microbial processing of aggregate-unprotected organic matter inputs is key for soil fertility, long-term ecosystem carbon and nutrient sequestration and sustainable agriculture. We investigated the effects of adding multiple nutrients (nitrogen, phosphorus and potassium plus nine essential macro- and micro-nutrients) on decomposition and biochemical transformation of standard plant materials buried in 21 grasslands from four continents. Addition of multiple nutrients weakly but consistently increased decomposition and biochemical transformation of plant remains during the peak-season, concurrent with changes in microbial exoenzymatic activity. Higher mean annual precipitation and lower mean annual temperature were the main climatic drivers of higher decomposition rates, while biochemical transformation of plant remains was negatively related to temperature of the wettest quarter. Nutrients enhanced decomposition most at cool, high rainfall sites, indicating that in a warmer and drier future fertilized grassland soils will have an even more limited potential for microbial processing of plant remains.

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