Fecha/hora: 11/06/2024 15:45:28

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 17/03/2022
Fecha de la última actualización: | 01/09/2022
Autoria: | FERNÁNDEZ SCAVINO, A.; OREGGIONI, D.; MARTÍNEZ PEREYRA, A.; TARLERA, S.; TERRA, J.A.; IRISARRI, P.
Afiliación: | ANA FERNÁNDEZ SCAVINO, Área Microbiología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Montevideo, Uruguay.; DANIELA OREGGIONI, Área Microbiología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Montevideo, Uruguay.; ANDREA MARTÍNEZ PEREYRA, Área Microbiología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Montevideo, Uruguay.; SILVANA TARLERA, Área Microbiología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Montevideo, Uruguay.; JOSÉ ALFREDO TERRA FERNÁNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PILAR IRISARRI, Laboratorio de Microbiología, Departmento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay.
Título: | Season and no-till Rice crop intensification affect soil microbial populations involved in CH4 and N2O emissions.
Año de publicación: | 2022
Fuente/Imprenta: | Frontiers in Soil Science, 17 March 2022, Volume 2, Article number 832600. OPEN ACCESS. Doi: https://doi.org/10.3389/fsoil.2022.832600
DOI: | 10.3389/fsoil.2022.832600
Idioma: | Inglés

Notas:

Article history: Received: 10 December 2021; Accepted: 01 February 2022; Published: 17 March 2022.
This article is part of the research topic ?Management of agroecosystems for enhancement of soil microbial communities and soil natural fertility? https://www.frontiersin.org/research-topics/19551/management-of-agroecosystems-for-enhancement-of-soil-microbial-communities-and-soil-natural-fertilit#articles

Contenido: | Abstract: Rice is an important source of methane (CH4) and other crops may be sources of nitrous oxide (N2O), both of which are powerful greenhouse gases. In Uruguay, irrigated rice rotates with perennial pastures and allows high productivity and low environmental impact. A long-term experiment with contrasting rice rotation intensification alternatives, including rice?soybean and continuous rice, was recently carried out in an Argialboll located in a temperate region of South America. To know if rotation systems influence soil microbial activity involved in CH4 and N2O emissions, the abundance and potential rate for gas production or consumption of microbial populations were measured during the rice crop season. CH4 was only emitted when rice was flooded and N2O emission was not detected. All rotational soils showed the highest rate for methanogenesis at tillering (30 days after rice emergence), while for methanotrophy, the maximum rate was reached at flowering. The abundance of related genes also followed a seasonal pattern with highest densities of mcrA genes being observed at rice flowering whereas pmoA genes were more abundant in dry soils after rice harvest, regardless of the rotation system. Differences were found mainly at tillering when soils with two consecutive summers under rice showed higher amounts of mcrA and pmoA gene copies. The potential denitrification rate was highest at the tillering stage, but the abundance of nirK and nirS genes was highest in winter. Regarding ammonium oxidation, bacterial amoA abundance was higher in winter while the archaeal amoA gene was similar throughout the year. A strong influence of the rice growth stage was registered for most of the parameters measured in rice paddy soils in this no-till rice intensification experiment. However, differences among rotations begin to be observed mainly at tillering when the abundance of populations of the methane and nitrous oxide cycles seemed to respond to the rice intensification.
Palabras-Clave: | INTENSIFICATION; METHANE; MICROBIAL ABUNDANCE; NITROUS OXIDE (N20); RICE ROTATIONS SYSTEMS.
Categoría del tema: | P01 Conservación de la naturaleza y recursos de La tierra
URL: | http://www.ainfo.inia.uy/digital/bitstream/item/16651/1/Frontier-Soil-Science-2002-Fernandez-Scavino.pdf
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (103532-1) - PXI - AP - DD - PP/Frontiers-in-soil-science-2022 -  -  - DIS