Effects of varying levels of protected fat on performance of Shami goats during early and mid lactation

This study was conducted to determine the responses of early lactating Shami goats to varying amounts of dietary supplementation of Ca salts of fatty acids. Shami goats (n = 75) in their first week of lactation were randomly assigned to 3 isonitrogenous dietary (TMR) treatments containing 0%, 3%, or 5% added Ca salt. The study took 60 days during which the following variables were measured: milk production and composition, body weight, feed intake, serum cholesterol and triglyceride, kids weaning weight, and milk fatty acids. Milk production and energy corrected milk were higher (P < 0.05) at 5% level. Percentages of milk composition were higher (P < 0.05) at 3% with CP% not different from 5%. No differences were observed in yields of different milk components including casein, final body weights, feed intake, or weaning weights of kids. Intake of metabolizable energy was higher (P < 0.05) at 5% level of Ca salts. Differences in milk fatty acids were mainly restricted to unsaturated ones with no effect on the saturated fatty acids. Such results suggest that milk production and content of lactating Shami goat can be changed by a level of 5% of Ca salts.

Anahtar Kelimeler:

Key words: Shami goat, Ca salts, lactation, fatty acid profile

Effects of varying levels of protected fat on performance of Shami goats during early and mid lactation

Keywords:

Key words: Shami goat, Ca salts, lactation, fatty acid profile,

PDF

___

Van Soest, P.J., Robertson, J.B., Lewis, B.A.: Methods for Dietary Fiber, and Nonstarch Polysaccharides in Relation to Animal Nutrition. J. Dairy Sci., 1991; 74:3583-3597.
Richardson, G.H.: Standard Methods for the Examination of Dairy Products, 15thed. American Public Health Association, Washington, DC. 1985.
SAS.: SAS user guide statistics. Version 7 edition. SAS Inst., Cary, NC, USA. 2000.
Steel, R. G. D. and Torrie, J. H.: Principles and procedures of statistics. 2nd ed. McGraw-Hill, USA. 1986.
Teh, T. H., Trung, L. T., Jia, Z. H., Gipson T. A.: Varying Amounts of Rumen Inert Fat for High Producing Goats in Early Lactation. J. Dairy Sci., 1994; 77: 253-258.
Chouinard, P. Y., Girard, V., Brisson, G. J.: Fatty Acid Profile and Physical Properties of Milk Fat From Cows Fed Calcium Salts of Fatty Acids with Varying Unsaturation. J. Dairy Sci., 1998; 81:471-481.
Chilliard, Y., Ferlay, A., Doreau, M.: Effect of Different types of Forage, Animal Fat or Marine Oils in Cow’s Diet on milk Fat Secretion and Composition, Especially Conjugated Linoliec Acid (CLA) and Polyunsaturated Fatty Acids. Livest. Prod. Sci., 2001; 70:31-48.
Andrade, P. V., Schmidely, P.: Effect of Duodenal Infusion of trans 10,cis 12-CLA on Milk Performance and Milk Fatty Acid Profile in Dairy Goats fed High or Low Concentrate Diet in Combination with Rolled Canola Seed. Reprod. Nutr. Dev., 2006; 46:31-48.
Harvatine, K. J., Allen, M. S.: Effect of Fatty Acid Supplements on Milk Yield and Energy Balance of Lactating Dairy Cows. J. Dairy Sci. 2006; 89: 1081-1091.
Chilliard, Y., Ferlay, A.: Dietary Lipids and Forages Interactions on Cow and Goat Milk Fatty Acid Composition and Sensory Properties. Reprod. Nutr. Dev., 2004; 44:467-492.