Comparison between Types of Feeding on Goat Milk Composition
Keywords:
feeding system, goat milk compositionAbstract
Twenty lactating Carpatina goats were randomly allocated to four treatment groups with different levels of concentrates on composition of Carpatina goat milk. Goats in group A were confined and fed alfalfa hay with 1.32 kg/day of concentrate mixture. Group B, C and D were rotationally grazed and received 1.32, 0.66 and 0 Kg/day of concentrate supplementation, respectively. The results obtained from this experiment indicated that goats fed with high concentrate level and pasture grazing (Group B and C) produced milk with significantly higher contents of fat, protein, lactose and total solids than goats kept on pasture alone (Group D) or under a confined feeding system with concentrate and hays (Group A ). Grazing significantly increased the concentration of saturated and polyunsaturated fatty acids, such as a-linolenic acid 0.49% (recorded from Group B). The milk from Group A (alfalfa hay and high concentrate) had an a-linolenic acid content of 0.38%.
References
Cutova, N., Ameliorarea producţiei de lapte la populaţiile de caprine prin încrucişări cu cele mai bune rase specializate, Raport de cercetare, Etapa a III-a 06.06.2007-15.12.200, Constanţa
Jarez, M., M.Ramos, Physico-chemical characteristics of goat’s milk as distinct from cow’s milk.Bulletin of the International Dairy Federation, 1986, 202, 54-67
Iancu, R., Monitoring goat milk physico-chemical composition during season using Analyzer Ekomilk Total,Annals of the Romanian Society for Cell Biology, Cluj-Napoca, 2010, vol xv, issues 2
Oprean, L., Analiza microbiologică a produselor alimentare, Ed. Univ. Lucian Blaga, Sibiu, 2003, pp. 182
Christie, W. W., Gas chromatography mass spectrometry methods for structural analysis of fatty acids, Lipids, 1998, 33, 343-353
Bernacka Henryka, Cytological Quality of Goat Milk on the Basis of the Somatic Cell Count, Journal Central European Agriculture, 2007,Volume 7, No.4 773-778
Guo, M. R., Dixon, P. H., Park, Y. W., Gilmore, J. A., Kindstedt, P. S.,. Seasonal changes in the chemical composition of commingled goat milk, J. Dairy Sci., 2001, 84 (Suppl. E), E79–E83
Morand-Fehr, P., Sauvant, D., Composition and yield of goat milk as affected by nutritional manipulation, J. Dairy Sci., 1980, 65, 1639–1642
Park, Y. W., Juarez, M., Ramos, M., Haenlein, G. F. W., Physico-chemical characteristics of goat and sheep milk, Small Ruminant Res., 2007, 68, 88-113
Sampelayo, M .R. S., Perez, L., Boza, J., Amigo, L., Forage of different physical forms in the diets of lactating Granadina goats: nutrient digestibility and milk production and composition, J. Dairy Sci., 1998, 81, 492-498
Luna, P., Fontecha, J., Juarez, M., de la Fuente, M. A., Changes in the milk and cheese fat composition of ewes fed commercial supplements containing linseed with special reference to the CLA content and isomer composition, Lipids, 2005, 40, 445-453
