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Review Paper
Asian-Australasian Journal of Animal Sciences 1998;11(3): 217-233.
https://doi.org/10.5713/ajas.1998.217    Published online June 1, 1998.
Milk yield and its fat content as a affected by dietary factors : A - Review
R. K. Sawal, C. K. Kurar
Milk yield and its composition is governed by level of nutrition and the composition of diet. Higher concentrate input improves milk yield, whereas its input at moderate levels improves yield of milk fat. High level of dietary protein improves dry matter intake and milk production, however, CP content above 14% has less advantage. Milk yield is enhanced by the feeding of cottonseed and soybean meal, whereas milk fat increases by the supplementation of cottonseed. Dietary fat increases energy intake, production of milk and milk fat. Quality and quantity of feeds consumed affect fermentation patterns in rumen. Among the rumen metabolites, volatile fatty acids (VFA) content and propionate proportion gave been related positively with milk yield, whereas proportion of acetate and butyrate have been related positively with milk fat content. Dietary carbohydrates through the source of sugar, starch, roughage and fibre affect VFA concentration in rumen. Therefore, concentration of volatile fatty acids could be altered to the advantage of consumer through judicious manipulation of diet.
Keywords: Roughage Ratio; Total Volatile Fatty Acids; Acetic Acid; Propionic Acid; Milk Yield; Milk Fat
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