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Metwally,, A., Abdel-Raouf, E., Shitta, A., EI-Diahy, Y. (2006). EFFECT OF FAT SUPPLEMENTATION ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LACTATING FRIESIAN COWS DURING EARLY LACTATION. Journal of Animal and Poultry Production, 31(1), 159-174. doi: 10.21608/jappmu.2006.235410
A M. Metwally,; E. M. Abdel-Raouf; A. A. Shitta; Y. M. EI-Diahy. "EFFECT OF FAT SUPPLEMENTATION ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LACTATING FRIESIAN COWS DURING EARLY LACTATION". Journal of Animal and Poultry Production, 31, 1, 2006, 159-174. doi: 10.21608/jappmu.2006.235410
Metwally,, A., Abdel-Raouf, E., Shitta, A., EI-Diahy, Y. (2006). 'EFFECT OF FAT SUPPLEMENTATION ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LACTATING FRIESIAN COWS DURING EARLY LACTATION', Journal of Animal and Poultry Production, 31(1), pp. 159-174. doi: 10.21608/jappmu.2006.235410
Metwally,, A., Abdel-Raouf, E., Shitta, A., EI-Diahy, Y. EFFECT OF FAT SUPPLEMENTATION ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LACTATING FRIESIAN COWS DURING EARLY LACTATION. Journal of Animal and Poultry Production, 2006; 31(1): 159-174. doi: 10.21608/jappmu.2006.235410

EFFECT OF FAT SUPPLEMENTATION ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF LACTATING FRIESIAN COWS DURING EARLY LACTATION

Article 6, Volume 31, Issue 1, January 2006, Page 159-174  XML PDF (4.95 MB)
Document Type: Original Article
DOI: 10.21608/jappmu.2006.235410
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Authors
A M. Metwally,1; E. M. Abdel-Raouf1; A. A. Shitta2; Y. M. EI-Diahy2
1Animal Prod. Dept., Fac. Agric., Kafr El-Sheikh, Tanta Univ.
2Animal Prod. Res. Institute, Agric. Res. Center, Min. of Agriculture
Abstract
Eighteen lactating Friesian cows were assigned to three equal groups to




study the effect of protected fat and palm oil supplemcntation on digestibility




efficients, rumen fermentation, some blood constituents, milk yield and its




omposition and reproductive performance during early lactation. The cows in the




rst group were fed a basal ration only (G,). While, ¡n the other two groups 3% of




ncentrate feed mixture was replaced by protected fat (GD) or palm oil (G3). The




perimental period lasted 15 weeks after calving.




Digestibility trials were carried out and rumen liquor samples were collected




the end of the experimental period. Blood samples were regularly collected from




imals at 3 week interval starting from day 21 after calving. Milk yield was recorded




aeekly, while its contents were analyzed once every three weeks. S




Results indicated that feeding protected fat and palm oil significantly (P < 0.05)




reased digestibility coefficients of DM, 0M, CF, EE and NFE and subsequently




and DCP values compared to control group, while, ruminai pH and




ncenirnrinn of TVFA’s were not affected. Adversely, ammonia-nitrogen




ncentration decreased significantly (P < 0.05) with supplementations.




Concentrations of total protein, albumin, globulin, total lipids and HDL ¡n blood




were highest in cows fed ration supplemented with palm oil. Cows fed




tecteci fat expressed the highest concentrations of total cholesterol, LDL and




çlycerides compared with the other two groups.




Actual milk yield and 4% fat corrected milk were significantly (P < 0.05) high




tc cows fed protected fat followed by cows ¡n G3, while the lowest levels were found




he control group. Yields of milk fat, protein, lactose, total solids and solids not fat




re significantly (P < 0.05) higher for cows fed protected fat and palm oil compared




cows fed the control rations.




Days open in G3 recorded the longest period followed by G2 and the least was




i ‘i,. Number of insemination per conception in G2 was 2.0 being insignificantly less




Dan that G and G3 (2.5). Conception rate within 150 day postpartum and after the




insemination was significantly (P <0.05) higher in G3 compared to G, and G2.




This study indicated that protected fat and palm oil supplementation in ration




iairy cows improved their feed efficiency and reduced the intake of DM and DCP




ired to produce 1 kg 4% FCM. Moreover, economic efficiency for cows fed




ted fat and palm oil was significantly higher compared with cows fed control

Keywords
Friesian cows; protected fat; palm oil; digestiblities; blood; milk composition; reproductive performance
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