| Autor: |
Serbester, Uğur, Ataözü, Arhan, Gürsel, Feraye Esen, Öztabak, Kemal, Çelik, Ladine |
| Přispěvatelé: |
Çukurova Üniversitesi, Ziraat Fakültesi, Zootekni Bölümü, Ataözü, Arhan, Çelik, Ladine, Serbester, Uğur |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Popis: |
Flaxseed oil (FOS) and fish oil (FO) contain omega-3 fatty acids. Flaxseed oil is characterized by a high concentration of alpha linolenic acids (ALA) while fish oil is rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). ALA can be converted through a series of desaturation and elongation reactions into EPA and DHA. However, these reactions have a poor efficiency in mammals. Therefore, the hypothesis was that maternal omega-3 fatty acids would influence differently gestation length, birth weight, weaning weight and average daily gain, and blood parameters of calves. Twenty five multiparous Holstein cows were used in an incomplete randomized block design with repeated measurements during summer 2016. Cows were blocked according to parity and last lactation milk yield and were randomly assigned to 1 of 2 prepartum total mixed ration supplemented with 5.4% FO or FOS during the last 21 d of gestation. Calves were fed colostrum within 2 h of birth from their own dam or from a dam fed the same treatment. After the colostral period, they were fed 4 L of whole milk and ad libitum alfalfa hay until weaning. Body weights were measured weekly, blood samples were taken at biweekly intervals. There were no difference in gestation length (274.5 vs 272.0 d for FO and FOS, respectively) and body weight at partum (594.6 vs 593.5 kg for FO and FOS, respectively) among the groups. Omega-3 fatty acid sources did not affect birth weights of calves (36.6 vs 34.1 kg for FO and FOS, respectively). Also, the source of omega-3 fatty acids in the diets did not influence the mean serum concentrations of alanine aminotransferase, aspartate aminotransferase, gamma-glutamyltransferase, alkaline phosphatase, glucose, total cholesterol and triglycerides. The results indicate that inclusion of FO or FOS to prepartum diet shows similar effect on the calf performance including metabolic profile. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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