N-fertilization of tropical pastures improves performance but not methane emission of Nellore growing bulls

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dc.contributor.authorLima, Lais De Oliveira [UNESP]
dc.contributor.authorOngaratto, Fernando [UNESP]
dc.contributor.authorDallantonia, Erick Escobar [UNESP]
dc.contributor.authorLeite, Rhaony Gonçalves [UNESP]
dc.contributor.authorArgentini, Gabriella Patrício [UNESP]
dc.contributor.authorFernandes, Marcia Helena MacHado Da Rocha [UNESP]
dc.contributor.authorReis, Ricardo Andrade [UNESP]
dc.contributor.authorVyas, Diwakar
dc.contributor.authorMalheiros, Euclides Braga [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Florida
dc.date.accessioned2023-07-29T16:15:44Z
dc.date.available2023-07-29T16:15:44Z
dc.date.issued2023-01-01
dc.description.abstractGrazing management and N-fertilizer have been reported to improve tropical forage productivity and quality, however, their effect on methane emission of grazing animals remains uncertain. Therefore, this study aimed to assess the effects of increasing application rates of nitrogen (N) fertilization of Marandu palisadegrass under continuous stocking on intake, digestibility, nitrogen balance, and enteric methane emissions of Nellore growing bulls. We hypothesized that changes in the forage nutritive value caused by N fertilization of pastures combined with adequate grazing management (e.g., greater crude protein [CP] and digestibility) would lead to an increase in animal productivity (e.g., greater average daily gain [ADG] and gain per area), and then, to a decrease in methane emission intensity. Treatments consisted of different annual application rates of nitrogen fertilization: 0, 75, and 150 kg N/ha using ammonium nitrate (32% N) as the nitrogen source. The experimental design was completely randomized, with three treatments and four replications (12 paddocks). Intake, digestibility, N balance, and methane emissions were measured in eight animals per treatment. CP intake, digestibility and N balance increased linearly with the increase in N fertilization (P < 0.05). In addition, stocking rate (SR) and ADG linearly increased from 1.75 animal unit (AU = 450 kg)/ha and 0.62 kg/d (0 kg N/ha) to 3.75 AU/ha and 0.82 kg/d (150 kg N/ha), respectively. Individual methane emissions nor methane emission intensity were affected by treatment with an average of 164.7 g/d and 199.7 g/kg ADG (P > 0.05). Annual N fertilization with ammonium nitrate between 75 and 150 kg N/ha in palisadegrass pastures under continuous stocking enhances animal performance per unit area yet not affecting neither methane production nor intensity.en
dc.description.affiliationDepartment of Animal Sciences Sao Paulo State University
dc.description.affiliationDepartment of Animal Sciences University of Florida
dc.description.affiliationDepartment of Mathematics and Statistics Sao Paulo State University, SP
dc.description.affiliationUnespDepartment of Animal Sciences Sao Paulo State University
dc.description.affiliationUnespDepartment of Mathematics and Statistics Sao Paulo State University, SP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.identifierhttp://dx.doi.org/10.1093/jas/skac362
dc.identifier.citationJournal of Animal Science, v. 101.
dc.identifier.doi10.1093/jas/skac362
dc.identifier.issn1525-3163
dc.identifier.issn0021-8812
dc.identifier.scopus2-s2.0-85160907807
dc.identifier.urihttp://hdl.handle.net/11449/250026
dc.language.isoeng
dc.relation.ispartofJournal of Animal Science
dc.sourceScopus
dc.subjectcattle
dc.subjectintensification
dc.subjectmarandu
dc.subjectmethane
dc.subjectproductivity
dc.subjectprotein
dc.titleN-fertilization of tropical pastures improves performance but not methane emission of Nellore growing bullsen
dc.typeArtigo
unesp.author.orcid0000-0002-6933-0644[1]
unesp.author.orcid0000-0002-7657-0267[8]
unesp.departmentCiências Exatas - FCAVpt
unesp.departmentZootecnia - FCAVpt

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