Effect of seasons on enteric methane emissions from cattle grazing Urochloa brizantha.

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dc.contributorJOÃO JOSÉ ASSUMPÇÃO DE ABREU DEMARCHI, IZ - Nova Odessa; MARCELO DE QUEIROZ MANELLA, Phibro Animal Health; ODO M A S P R PRIMAVESI; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; LAURA ALEXANDRA ROMERO, FMVZ-USP; ALEXANDRE BERNDT, CPPSE; MAGDA APARECIDA DE LIMA, CNPMA.
dc.creatorDEMARCHI, J. J. A. de A.
dc.creatorMANELLA, M. Q.
dc.creatorPRIMAVESI, O. M. A. S. P. R.
dc.creatorFRIGHETTO, R. T. S.
dc.creatorROMERO, L. A.
dc.creatorBERNDT, A.
dc.creatorLIMA, M. A. de
dc.date2016-10-10T11:11:11Z
dc.date2016-10-10T11:11:11Z
dc.date2016-10-10
dc.date2016
dc.date2017-03-03T11:11:11Z
dc.date.accessioned2026-07-07T05:02:15Z
dc.descriptionAbstract: The objective of this study was to evaluate the effect of seasons under a tropical climate on forage quality, aswell the effect of an Urochloa brizantha cv. Marandu grazing system on enteric methane (CH4) emissions fromNellore cattle in the Southeast region of Brazil. Sixteen Nellore steers (18 months old and initial weight 318.0 ± 116.59 kg of LW; final weight 469 ± 98.50 kg of LW) were used for a trial period of 10 months, with four collection periods in winter (August), spring (December), summer (February) and autumn (May). Each collection period consisted of 28 days, corresponding to the representative month of each season where the last six days were designed for methane data collection. Animals were randomly distributed within 16 experimental plots, distributed in four random blocks over four trial periods. CH4 emissions were determined using the sulphur hexafluoride (SF6) tracer gas technique measured by gas chromatography and fluxes of CH4 calculated. The forage quality was characterized by higher CP and IVDMD and lower lignin contents in spring, differing specially from winter forage. Average CH4 emissions were between 102.49 and 220.91 g d-1 (37.4 to 80.6 kg ani-1 yr-1); 16.89 and 30.20 g kg-1 DMI; 1.35 and 2.90 Mcal ani-1 d-1; 0.18 and 0.57 g kg-1 ADG-1 and 5.05 and 8.76% of GE. Emissions in terms of CO2 equivalents were between 4.68 and 14.22 g CO2-eq-1 g-1 ADG. Variations in CH4 emissions were related to seasonal effect on the forage quality and variations in dry matter intake.
dc.identifierJournal of Agricultural Science, Toronto, v. 8, n. 4, p. 106-115, 2016.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1054343
dc.identifier.urihttp://hdl.handle.net/123456789/478112
dc.languageeng
dc.rightsopenAccess
dc.subjectCO2-eq
dc.subjectEnteric methane
dc.subjectNelore
dc.subjectFermentação
dc.subjectGado de corte
dc.subjectMetano
dc.subjectNutrição animal
dc.subjectRuminação
dc.subjectGramínea forrageira
dc.subjectUrochloa brizantha
dc.subjectMethane
dc.subjectNellore
dc.subjectBeef cattle
dc.subjectGas emissions
dc.subjectSulfur hexafluoride
dc.titleEffect of seasons on enteric methane emissions from cattle grazing Urochloa brizantha.
dc.typeArtigo de periódico

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