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Nitrate and lipids have been recognized as effective dietary additives to reduce enteric methane (CH4) production. The objective of this experiment was to evaluate the effects of nitrate (NO3¯) and canola oil, alone or in combination, on enteric CH4, volatile fatty acid (VFA) concentrations, digesta kinetics and outflow of DM and microbial non-ammonia nitrogen (MicNAN) from the rumen of cattle. Four rumen-cannulated steers were used in the experiment [ver mas...]
dc.contributor.authorVillar, Maria Laura
dc.contributor.authorHegarty, Roger Stephen
dc.contributor.authorNolan, John V.
dc.contributor.authorGodwin, Ian R.
dc.contributor.authorMcPhee, Malcolm J.
dc.date.accessioned2020-04-16T18:56:41Z
dc.date.available2020-04-16T18:56:41Z
dc.date.issued2020-01
dc.identifier.issn0377-8401
dc.identifier.otherhttps://doi.org/10.1016/j.anifeedsci.2019.114294
dc.identifier.urihttp://hdl.handle.net/20.500.12123/7099
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0377840119304493
dc.description.abstractNitrate and lipids have been recognized as effective dietary additives to reduce enteric methane (CH4) production. The objective of this experiment was to evaluate the effects of nitrate (NO3¯) and canola oil, alone or in combination, on enteric CH4, volatile fatty acid (VFA) concentrations, digesta kinetics and outflow of DM and microbial non-ammonia nitrogen (MicNAN) from the rumen of cattle. Four rumen-cannulated steers were used in the experiment which was designed as 4×4 Latin Square with four 21-d periods and four treatments. Dietary treatments consisted of a control diet (CON: 400 g/kg lucerne chaff and 600 g/kg barley grain), NO3¯ (CON+20 g NO3¯/kg), O (CON+50 g canola oil/kg), and NO3¯+O (CON+20 g NO3¯/kg + 50 g canola oil/kg)with all inclusions expressed as g/kg as-fed. Exogenous markers (Co-EDTA, Yb-acetate and 15NH4Cl) were continuously infused into the rumen over 4 d to estimate digesta flow and rumen N outflow while whole tract digestibility (DMD) was determined using chromic oxide. Compared with the CON diet, feeding the NO3 ¯+O diet reduced (P < 0.01) methane yield (MY, g CH4/kg DMI) by 25%, daily methane production (DMP, g CH4/d) by 26% (P < 0.01) and the rumen mean retention time (MRT; P < 0.05). Nitrate containing diets reduced DMD (P < 0.01). Total VFA did not differ between treatments (P > 0.05) but NO3¯-containing diets increased acetateproportion (P < 0.01) whereas feeding the O diet increased propionate proportion (P < 0.01). Oil-containing diets reduced rumen volume (P < 0.01). The rumen protozoa concentration was reduced by including NO3¯ and canola oil alone or in combination in the diet of cattle (P < 0.05). This experiment demonstrates that feeding NO3¯+O has a synergistic effect on reducing methanogenesis from beef cattle which is consistent with NO3¯ and canola oil having complementary mechanisms for suppressing enteric CH4 production. Reducing methanogenesis by feeding NO3¯+O in this experiment did not improve the flow of MicNAN from the rumen (g MicNAN/d), microbial growth efficiency (g MicNAN/digestible organic matter intake, DOMI) or the proportion of microbial N derived from rumen NH3.es_AR
dc.formatapplication/pdfeng
dc.language.isoeng
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/openAccesseng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.sourceAnimal feed science and technology 259 : 114294. (January 2020)es_AR
dc.subjectNutrición Animales_AR
dc.subjectAnimal Nutritioneng
dc.subjectRumenes_AR
dc.subjectDietaes_AR
dc.subjectDieteng
dc.subjectAlimentación de los Animaleses_AR
dc.subjectAnimal Feedingeng
dc.subjectNitratoses_AR
dc.subjectNitrateseng
dc.subjectGanado Bovinoes_AR
dc.subjectCattleeng
dc.subjectRumen Protozoaeng
dc.subjectProtozoos del Rumen
dc.subject.otherDieta del Ganadoes_AR
dc.subject.otherMethanogenesis
dc.titleThe effect of dietary nitrate and canola oil alone or in combination on fermentation, digesta kinetics and methane emissions from cattleeng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.description.origenEstación Experimental Agropecuaria Barilochees_AR
dc.description.filFil: Villar, Maria Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.description.filFil: Hegarty, Roger Stephen. University of New England. School of Environmental and Rural Science; Australiaes_AR
dc.description.filFil: Nolan, John V. University of New England. School of Environmental and Rural Science; Australiaes_AR
dc.description.filFil: Godwin, Ian R. University of New England. School of Environmental and Rural Science; Australiaes_AR
dc.description.filFil: McPhee, Malcolm J. University of New England. NSW Department of Primary Industries, Livestock Industries Centre; Australiaes_AR
dc.subtypecientifico


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