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Resumen
The objective of this study was to determine (1) the effects of increasing flaxseed addition to the corn grain supplemented at finishing to grazing steers on animal performance, carcass characteristics and longissimus muscle (LM) fatty acid profile, and (2) whether dietary treatments effects are affected by animal body weight (BW) at supplementation. Forty eight steers were assigned to eight treatment combinations defined by four dietary treatments [ver mas...]
dc.contributor.authorPouzo, Laura Beatriz
dc.contributor.authorFanego, Noelia
dc.contributor.authorSantini, Francisco Jose
dc.contributor.authorDescalzo, Adriana Maria
dc.contributor.authorPavan, Enrique
dc.date.accessioned2018-12-04T14:03:58Z
dc.date.available2018-12-04T14:03:58Z
dc.date.issued2015-08
dc.identifier.issn1871-1413
dc.identifier.otherhttps://doi.org/10.1016/j.livsci.2015.05.034
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S187114131500284X
dc.identifier.urihttp://hdl.handle.net/20.500.12123/4009
dc.description.abstractThe objective of this study was to determine (1) the effects of increasing flaxseed addition to the corn grain supplemented at finishing to grazing steers on animal performance, carcass characteristics and longissimus muscle (LM) fatty acid profile, and (2) whether dietary treatments effects are affected by animal body weight (BW) at supplementation. Forty eight steers were assigned to eight treatment combinations defined by four dietary treatments (CNTRL, no supplement; FLAX-0, 0.7% BW of cracked corn grain; FLAX-1 and FLAX-2, FLAX-0 plus 0.125% and 0.250% BW of unprocessed flaxseed, respectively) and by two animal BW treatments generated by supplementing steer in early spring (EARLY) or late spring (LATE). Steers assigned to EARLY received their dietary treatment when reaching 366±27.3 kg BW (August, 3rd) and those assigned to LATE when reaching 458±42.8 kg (October, 10th). After 70 d on trial, carcass data and LM samples (12th rib region) were collected for fatty acid (FA) analysis. Total DMI was greater in supplemented treatments (FLAX-0, FLAX-1 and FLAX-2) than in CNTRL, with no flaxseed level effect. Dietary treatment effects on performance and carcass characteristics were not affected by BW treatments. Increasing flaxseed supplementation linearly increased subcutaneous fat thickness; whereas increasing BW at initiation of supplementation decreased average daily again, but increase final BW, hot carcass weight, and LM total fatty acid content. Animal BW at initiation of supplementation affected dietary treatments effects on LM n-6/n-3 ratio; ratio was highest in FLAX-0 and lowest in CNTRL and FLAX-2 in both BW treatments; did not differ between BW treatments in CNTRL and in FLAX-2, but was greater in EARLY than in LATE in FLAX-0 and FLAX-1. Trans-vaccenic acid proportion was greater in CNTRL than in supplemented treatments, but was not affected by flaxseed level; similar trend was observed for CLA cis-9, trans-11 proportion. Linolenic acid proportion did not differ between CNTRL and supplemented treatments, but was linearly increased with flaxseed level. Fatty acids changes with increasing animal BW at supplementation were associated with the increased in total muscle fatty acid content; total and individual polyunsaturated fatty acids were lower in LATE than in EARLY, whereas trans-vaccenic acid and CLA cis-9, trans-11 were greater. Adding flaxseed to the corn grain supplemented increase subcutaneous fat thickness of grazing steers without negatively affecting fatty acid profile, except for a reduction in trans-vaccenic acid proportion. Therefore, adding flaxseed to the corn supplemented to grazing steers increases carcass fatness while reducing the negative effect of corn supplementation on LM n-6/n-3 ratio but not on trans-vaccenic acid. Increasing BW at supplementation reduces supplementation effects on LM n-6/n-3 ratio.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceLivestock Science 178 : 140-149 (August 2015)es_AR
dc.subjectBueyes_AR
dc.subjectBullockseng
dc.subjectPastoreoes_AR
dc.subjectGrazingeng
dc.subjectDesempeño Animales_AR
dc.subjectAnimal Performanceeng
dc.subjectAlimentación de los Animaleses_AR
dc.subjectAnimal Feedingeng
dc.subjectMaízes_AR
dc.subjectMaizeeng
dc.subjectSuplementoses_AR
dc.subjectSupplementseng
dc.subjectLinazaes_AR
dc.subjectLinseedeng
dc.subjectAcidos Grasoses_AR
dc.subjectFatty Acidseng
dc.subject.otherNovilloes_AR
dc.subject.otherSemilla de Linoes_AR
dc.titleAnimal performance, carcass characteristics and beef fatty acid profile of grazing steers supplemented with corn grain and increasing amounts of flaxseed at two animal weights during finishinges_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Balcarcees_AR
dc.description.filFil: Pouzo, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentinaes_AR
dc.description.filFil: Fanego, Noelia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina- Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentinaes_AR
dc.description.filFil: Santini, Francisco Jose. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentinaes_AR
dc.description.filFil: Descalzo, Adriana Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Tecnología de Alimentos; Argentinaes_AR
dc.description.filFil: Pavan, Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentinaes_AR
dc.subtypecientifico


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