Data/hora: 04/06/2024 02:20:42

Provedor de dados: | 45
País: | Brazil
Título: | Milk fatty acid profile from grazing buffaloes fed a blend of soybean and linseed oils
Autores: | Gagliostro,G.A.; Patiño,E.M.; Sanchez Negrette,M.; Sager,G.; Castelli,L.; Antonacci,L.E.; Raco,F.; Gallello,L.; Rodríguez,M.A.; Cañameras,C.; Zampatti,M.L.; Bernal,C.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Buffaloes; Conjugated linoleic acid; Lactation; Soybean oil; Linseed oil.
Resumo: | The aim of the study was to examine the changes in milk fatty acid (FA) profile of grazing buffaloes fed either low (L, 276g/d) or high (H, 572g/d) doses of a blend (70:30, wt/wt) of soybean and linseed oils. Fourteen multiparous Mediterranean buffaloes grazing on a native pasture were fed 4 kg/day of a commercial concentrate containing no supplemental oil over a pre-experimental period of ten days. The baseline milk production and composition and milk FA profile were measured over the last three days. After this pre-experimental period the animals received the same concentrate added with either the L or H oil doses for 26 additional days. Milk yield (g/animal/day) did not differ at the start (1776 ± 522 and 1662 ± 291 for L and H, respectively, P&lt;0.622) or at the end of the trial (4590 ± 991 and 4847 ± 447 in L and H, respectively, P&lt;0.543). Baseline milk fat content (g/kg) averaged 77.1 (±20.5) in L and 74.3 (±9.9) in H (P&lt;0.10) and was reduced (P&lt;0.031) to 60.7 (±23.6) and 49.4 (±11.2) (P&lt;0.0031) respectively after L and H with no differences between treatments (P&lt;0.277). Baseline milk protein content (L=43.2 ± 3.4 and H= 44.3 ± 6.9g/kg) increased after oil supplementation (P&lt;0.0001) in both L (73.2 ± 6.0g/kg) and H (68.4 ± 4.9g/kg) without differences between oil doses (P&lt;0.123). Milk fat content of 14:0 decreased after oil supplementation only in the H treatment (5.29 to 4.03, P&lt;0.007) whereas that of 16:0 was reduced (P&lt;0.001) at both L (24.49 to 19.75g/100g FA) and H (25.92 to 19.17g/100g FA) doses. The reduction of total content of 12:0 to 16:0 was higher (P&lt;0.052) in H (32.02 to 23.93g/100g FA) than L (30.17 to 25.45g/100g FA). Vaccenic acid content increased (P&lt;0.001) from 5.70 to 13.24g/100g FA in L and from 5.25 to 16.77 in H, with higher results in the in H treatment (P&lt;0.001). Baseline rumenic acid was sharply increased (P&lt;0.001) in L (1.80 to 4.09g/100g FA, +127%) and H (1.60 to 4.61g/100g FA, +187%) with no differences between L and H (P&lt;0.19). Overall, these results indicate a pronounced improvement in the nutritional value of milk fat from grazing buffaloes fed little amounts (0.276g/day) of a blend of soybean and linseed oils.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300927
Editor: | Universidade Federal de Minas Gerais, Escola de Veterinária
Relação: | 10.1590/1678-4162-7811
Formato: | text/html
Fonte: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.67 n.3 2015
Fonte: | info:eu-repo/semantics/openAccess