Effect of using natural feed additives performance of dairy Friesian cows
Abstract: Twenty eight lactating Friesian cows averaged 520 kg live body weight were assign to evaluate the effect of supplementation of lactating Friesian cows with yeast culture and Enzyme on milk production efficiency. Cows were divided into four experimental groups and fed the same basal ration but differed in feed additives. Cows in the 1st group (T1) were fed a basal ration containing concentrate feed mixture, berseem hay, rice straw and corn silage (control). Cows in the 2nd (T2) and 3rd (T3) were fed the basal ration supplemented with 10 g enzyme (Fibrozyme containing 100XU/g xylanase) and 10g yeast culture (Yea-Sacc containing 108 cells of Saccharomyces cerevesiae/g). respectively. While. those in the 4th group (T4) were fed the basal ration supplemented with 5g yeast + 5g Enzyme. Feeding period lasted for 16 weeks. Four digestibility trials using 12 lactating Friesian cows. three in each trial were conducted to determine nutrient digestibility coefficients and feeding values in experimental groups. Rumen and blood parameters. feed utilization and economic efficiency were also studied. Results showed that cows fed rations supplemented with both 10g yeast. 10g Enzyme and 5g yeast plus 5g Enzyme improved (P<0.05) most nutrient digestabilities and feeding values as TDN and DCP compared with control ration. as well as rumen and blood parameters. Milk yield as actual milk yield and 4% fat corrected milk, total yields of fat and protein in milk and economic efficiency were the highest (P<0.05) for cows in T4 and T3.
In the light of the present results cows with yeast culture. mixture yeast plus enzyme and enzyme tended to have greater beneficial effects in the performance and had improved the economic efficiency of milk production. especially those treated with 10g yeast/h/d.
Keywords: Friesian cows, yeast culture, Enzyme, digestibility, milk yield, blood
Publication year 2008
Pages 537-548
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- دقى- جيزة
Availability number
Organization Name
serial title Egyptian Journal of Animal Production
ISSN 0302-4520
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Blood. Cows. Digestibility. Enzymes. Milk yield. Yeasts.
Publication Type Journal
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