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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Rahmat Ababakri (Shahid Bahonar University of Kerman) Omid Dayani (Shahid Bahonar University of Kerman) Amin Khezri (Shahid Bahonar University of Kerman) Abbas Ali Naserian (Faculty of Agriculture Ferdowsi University of Mashhad Iran)
저널정보
한국축산학회(구 한국동물자원과학회) 한국축산학회지 한국축산학회지 제63권 제3호
발행연도
2021.1
수록면
475 - 490 (16page)

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초록· 키워드

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An experiment was conducted to determine the effects of two levels of rumen undegradable protein (RUP) without or with whole or extruded flaxseed on milk yield, milk component, milk fatty acids (FAs) profile and plasma metabolites in transition ewes. Three weeks before and after lambing, seventy-two Baluchi ewes were used in a completely randomized design with a 3 × 2 factorial arrangement of treatments. The treatments contained 1) no flaxseed + 20% RUP (no flaxseed, low RUP [NFLR]); 2) no flaxseed + 40% RUP (no flaxseed, high RUP [NFHR]); 3) 10% whole flaxseed + 20% RUP (whole flaxseed, low RUP [WFLR]); 4) 10% whole flaxseed + 40% RUP (whole flaxseed, high RUP [WFHR]); 5) 10% extruded flaxseed + 20% RUP (extruded flaxseed, low RUP [EFLR]), and 6) 10% extruded flaxseed + 40% RUP (extruded flaxseed, high RUP [EFHR]). Ewes fed 10% extruded flaxseed exhibited higher (p < 0.001) dry matter intake (DMI) and colostrum yield (p < 0.1) compared to other treatments. Two types of flaxseed and RUP levels had no significant effect on milk yield, but milk fat and protein contents decreased and increased in diets containing 40% RUP, respectively. Ewes fed extruded flaxseed produced milk with lower concentrations of saturated fatty acids (SFA) and higher α-linolenic and linoleic acids and also polyunsaturated fatty acids (PUFA) compared to other groups (p < 0.05). During post-lambing, the ewes fed diets containing flaxseed exhibited higher concentration of serum non-esterified FAs (NEFA) compared to diets without flaxseed (p < 0.01). The concentration of serum β-hydroxybutyric acid (BHBA) decreased in the diets containing flaxseed types at pre-lambing, but increased in diets containing extruded flaxseed at post-lambing (p < 0.01). The serum glucose concentration of ewes (pre and post-lambing) which consumed diets containing extruded flaxseed or 40% RUP increased, but blood urea concentration was elevated following supplementation of diet with whole flaxseed or 40% RUP (p < 0.001). In conclusion, utilization of 10% extruded flaxseed in the diets of transition ewes had positive effects on animal performance with favorable changes in milk FAs profile. However, there is no considerable advantage to supply more than 20% RUP level in the diet of transition dairy sheep.
#Transition period #Rumen undegradable protein #Flaxseed #Colostrum #Milk fatty acids

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참고문헌 (63)

참고문헌 신청
L.E.R. Dawson / 1999 / The effect of the digestible undegradable protein concentration of concentrates and protein source offered to ewes in late pregnancy on colostrum production and lamb performance / Animal Feed Science and Technology 82(1-2):21~36 Crossref H V Petit / 2010 / Review: Feed intake, milk production and milk composition of dairy cows fed flaxseed / Canadian Journal of Animal Science 90(2):115~127 Crossref H.V. Petit / 2005 / Effects of Flaxseed on Protein Requirements and N Excretion of Dairy Cows Fed Diets with Two Protein Concentrations / Journal of Dairy Science 88(5):1755~1764 Crossref H. V. Petit / 2007 / Milk production, milk composition, blood composition, and conception rate of transition dairy cows fed different profiles of fatty acids / Canadian Journal of Animal Science 87(4):591~600 Crossref H.V. Petit / 2010 / Milk production and composition, milk fatty acid profile, and blood composition of dairy cows fed whole or ground flaxseed in the first half of lactation / Animal Feed Science and Technology 158(1-2):36~43 Crossref

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