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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Impact of Grazing Intensity and Seasons on Greenhouse Gas Emissions in Tropical Grassland

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Author(s):
Cardoso, Abmael da Silva ; Brito, Liziane de Figueiredo ; Janusckiewicz, Estella Rosseto ; Morgado, Eliane da Silva ; Barbero, Rondineli Pavezzi ; Werner Koscheck, Jefferson Fabiano ; Reis, Ricardo Andrade ; Ruggieri, Ana Claudia
Total Authors: 8
Document type: Journal article
Source: ECOSYSTEMS; v. 20, n. 4, p. 845-859, JUN 2017.
Web of Science Citations: 7
Abstract

Greenhouse gases (GHG) can be affected by grazing intensity, soil, and climate variables. This study aimed at assessing GHG emissions from a tropical pasture of Brazil to evaluate (i) how the grazing intensity affects the magnitude of GHG emissions; (ii) how season influences GHG production and consumption; and (iii) what are the key driving variables associated with GHG emissions. We measured under field conditions, during two years in a palisade-grass pasture managed with 3 grazing intensities: heavy (15 cm height), moderate (25 cm height), and light (35 cm height) N2O, CH4 and CO2 fluxes using static closed chambers and chromatographic quantification. The greater emissions occurred in the summer and the lower in the winter. N2O, CH4, and CO2 fluxes varied according to the season and were correlated with pasture grazing intensity, temperature, precipitation, % WFPS (water-filled pores space), and soil inorganic N. The explanatory variables differ according to the gas and season. Grazing intensity had a negative linear effect on annual cumulative N2O emissions and a positive linear effect on annual cumulative CO2 emissions. Grazing intensity, season, and year affected N2O, CH4, and CO2 emissions. Tropical grassland can be a large sink of N2O and CH4. GHG emissions were explained for different key driving variables according to the season. (AU)

FAPESP's process: 12/06718-8 - Nitrogen balance, emission of greenhouse gases and mitigation of N2O in the production of beef cattle grazing
Grantee:Abmael da Silva Cardoso
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 11/00060-8 - GHG full account and mitigation strategies in Brachiaria pastures submitted to different management
Grantee:Telma Teresinha Berchielli
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/14956-6 - Impacts productive, environmental and economic of the supplementation strategies of the diet of beef cattle under grazing heights and termination strategies
Grantee:Rondineli Pavezzi Barbero
Support type: Scholarships in Brazil - Doctorate