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The objective was to reduce saturated fatty acids (SFA) and increase conjugated linoleic acid (CLA, cis- 9, trans -11 C18:2), α-linolenic (cis- 9, cis- 12, cis- 15 C18:3) and docosahexaenoic (DHA, C22:6) contents in milk from confined dairy cows in order to promote a healthier option. The work was carried out in a commercial farm (Talar) located in Laguna del Sauce, Maldonado (Uruguay). Twenty four cows were assigned to one of two treatments (12 cows per [ver mas...]
dc.contributor.authorGagliostro, Gerardo Antonio
dc.contributor.authorAntonacci, Liliana Elisabet
dc.contributor.authorPerez, Carolina Daiana
dc.contributor.authorRossetti, Luciana
dc.contributor.authorCarabajal, Augusto
dc.date.accessioned2020-06-03T17:54:38Z
dc.date.available2020-06-03T17:54:38Z
dc.date.issued2018-09-10
dc.identifier.issn2156-8561
dc.identifier.issn2156-8553
dc.identifier.otherhttps://doi.org/10.4236/as.2018.99078
dc.identifier.urihttp://hdl.handle.net/20.500.12123/7355
dc.identifier.urihttps://www.scirp.org/journal/paperinformation.aspx?paperid=87285
dc.description.abstractThe objective was to reduce saturated fatty acids (SFA) and increase conjugated linoleic acid (CLA, cis- 9, trans -11 C18:2), α-linolenic (cis- 9, cis- 12, cis- 15 C18:3) and docosahexaenoic (DHA, C22:6) contents in milk from confined dairy cows in order to promote a healthier option. The work was carried out in a commercial farm (Talar) located in Laguna del Sauce, Maldonado (Uruguay). Twenty four cows were assigned to one of two treatments (12 cows per treatment) over a 6 weeks experimental period. Treatments consisted in a control total mixed ration (C-TMR) without supplementary lipids (L) or the same TMR with the addition of 0.144 kg/cow∙day of algae and 0.72 kg/cow∙day of soybean oil (L-TMR). Chemical composition of the TMR (44.27% DM) averaged 15.94% for crude protein (CP), 38.20% neutral detergent fiber (NDF), 20.36% acid detergent fiber (ADF), 5.56% fat, 5.30% ash and 28.6% nonstructural carbohydrate (NSCH) with 1.81 Mcal/kg of net energy for lactation (NEL). After 39 days of feeding, individual milk samples were collected during three consecutive days. From the total milk collected, 20 ml were immediately used for chemical composition (Milko Scan) and 80 ml for analysis for milk FA profile. From week 3 onwards, milk production (kg/cow∙day) resulted higher (P < 0.001) in L-TMR (36.9) compared to C-TMR (35.2). At week 6 of trial, the difference in milk production averaged 5.14% for L-TMR. Supplementary lipids reduced (P < 0.002) milk fat concentration (g/100g) from 3.36 in C-TMR to 2.40 in L-TMR without effect (P = 0.43) on milk protein content (C-TMR = 3.20; L-TMR = 3.07 g/100g). Milk lactose (C-TMR = 4.86, L-TMR = 4.69 g/100g) and urea nitrogen contents (C-TMR = 21.18, L-TMR = 17.33 g/100g) tended (P < 0.056) to decrease in L-TMR as well as fat corrected milk output (C-TMR = 30.89, L-TMR = 29.49 kg/cow∙day, P < 0.098). Lipid supplementation reduced (−23%) milk content of C12:0 to C16:0 FA averaging 45.19 in C-TMR and 34.74 g/100g in L-TMR (P < 0.001). The atherogenic index (AI) of milk decreased (P < 0.001) from 2.69 in C-TMR to 1.50 in L-TMR (−44.2%). Concentration (g/100g) of elaidic (C18:1 trans -9) (0.23) and C18:1 trans -10 (0.44) FA increased (P < 0.001) in L-TMR milk. Milk vaccenic acid (trans- 11 C18:1, VA) increased from 1.08 in C-TMR to 2.56 g/100g of FA in L-TMR (P < 0.001). Milk CLA content (cis- 9, trans- 11 C18:2) increased (127%) from 0.62 in C-TMR to 1.41 g/100g FA in L-TMR milk. Content of α-linolenic acid resulted 20% higher (P < 0.001) in L-TMR milk (0.35 g/100g FA) compared to C-TMR (0.30 g/100g FA). Milk DHA increased from 0 in C-TMR to 0.14 g/100g FA in L-TMR. The omega-6/-3 ratio in C-TMR milk (9.61) was reduced (P < 0.001) to 6.78 in L-TMR milk. Milk oleic acid (cis -9 C18:1) resulted higher (P < 0.001) in L-TMR (23.65) than in C-TMR (19.75 g/100g FA). The nutritional value of milk fat from confined cows was naturally improved by feeding polyunsaturated FA in the ration, obtaining a reduction of saturated FA and increased levels of healthy FA (CLA, DHA and α-linolenic).eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.rightsinfo:eu-repo/semantics/openAccesses_AR
dc.sourceAgricultural Sciences 9 (9) : 1115-1130 (2018)es_AR
dc.subjectDairy Cowseng
dc.subjectVacas Lecherases_AR
dc.subjectFatty Acidseng
dc.subjectÁcidos Grasoses_AR
dc.subjectLinoleic Acideng
dc.subjectÁcido Linoléicoes_AR
dc.subjectDocosahexaenoic Acideng
dc.subjectÁcido Docosahexaenóicoes_AR
dc.subjectSoybean Oileng
dc.subjectAceite de Sojaes_AR
dc.subjectFood Supplementationeng
dc.subject.otherMilk Fatty Acidseng
dc.subject.otherÁcidos Grasos Lácteoses_AR
dc.subject.otherDHA-Micro Algaeeng
dc.subject.otherConfined Production Systemeng
dc.subject.otherSistema de Producción en Confinamientoes_AR
dc.titleImproving the Quality of Milk Fatty Acid in Dairy Cows Supplemented with Soybean Oil and DHA-Micro Algae in a Confined Production Systemes_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.filFil: Gagliostro, Gerardo Antonio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Balcarce. Area de Producción Animal; Argentina.es_AR
dc.description.filFil: Antonacci, Liliana Elisabet. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Balcarce. Area de Producción Animal; Argentina.es_AR
dc.description.filFil: Perez, Carolina Daiana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto Tecnología de Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.es_AR
dc.description.filFil: Rossetti, Luciana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto Tecnología de Alimentos; Argentina.es_AR
dc.description.filFil: Carabajal, Augusto. Establecimiento Agroindustrial Talar. Laguna del Sauce. Departamento de Maldonado; Uruguayes_AR
dc.subtypecientifico


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