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Effects of Forage:Concentrate Ratio on Growth Performance, Ruminal Fermentation and Blood Metabolites in Housing-feeding Yaks.
- Source :
-
Asian-Australasian Journal of Animal Sciences . Dec2015, Vol. 28 Issue 12, p1736-1741. 6p. - Publication Year :
- 2015
-
Abstract
- The objective of this study was to determine the effect of forage: concentrate ratio (F:C) on growth performance, ruminal fermentation and blood metabolites of housing-feeding yaks. Thirty-two Maiwa male yaks (initial body weight = 207.99±3.31 kg) were randomly assigned to four dietary treatments (8 yaks per treatment). Experimental diets were: A, B, C, D which contained 70:30, 60:40, 50:50 and 40:60 F:C ratios, respectively. Dry matter intake and average daily gain in yaks fed the C and D diets were greater (p<0.05) than yaks fed the A and B diets. No differences were found in ruminal NH3-N, total volatile fatty acids, acetate, butyrate, valerate, and isovalerate concentrations. The propionate concentration was increased (p<0.05) in the C and D groups compared with the A and B diets. In contrast, the acetate to propionate ratio was decreased and was lowest (p<0.05) in the C group relative to the A and B diets, but was similar with the D group. For blood metabolites, no differences were found in serum concentrations of urea-N, albumin, triglyceride, cholesterol, low density lipoprotein, alanine aminotransferase, and aspartate aminotransferase (p>0.05) among treatments. Treatment C had a higher concentration of total protein and high density lipoprotein (p<0.05) than A and B groups. In addition, there was a trend that the globulin concentration of A group was lower than other treatments (p = 0.079). Results from this study suggest that increasing the level of concentrate from 30% to 50% exerted a positive effect on growth performance, rumen fermentation and blood metabolites in yaks. [ABSTRACT FROM AUTHOR]
- Subjects :
- *YAK
*FERMENTATION
*METABOLITES
*BODY weight
*ALANINE aminotransferase
*LIPOPROTEINS
Subjects
Details
- Language :
- English
- ISSN :
- 10112367
- Volume :
- 28
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Asian-Australasian Journal of Animal Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 110585969
- Full Text :
- https://doi.org/10.5713/ajas.15.0419