Nutritional and physiological studies on Friesian calves fed protected fat and protein diets: 1. Growth performance and carcass traits
Abstract: A total of 18 Newborn Friesian male calves up to 8 months of age was used in 3 dietary treatment groups to study the effect of feeding protected protein and protected fat diets on growth performance and carcass traits. The 1st group was fed untreated CFM (C ), the 2nd was fed CFM, 5% of it was replaced by protected fat (PF) and the 3rd was fed CFM treated with 1% formaldehyde (pp). Beside CFM, calves in both groups were fed on berseem hay (BH) and milk during the suckling period and CFM and PH during post-weaning ages. Results indicated that at the end of the experiment ( 8 month of age), live body weight (LBW) of calves fed pp and pf diets significantly (P<0.05) increased by about 15 and 9% compared with the control calves, respectively. While, calves fed pp was significantly (p<0.05) heavier by about 5% than of calves fed PF. Average daily gain (ADG) was significantly (p<0.05) higer in calves fed PP and PF diets by about 19.7 and 12.2% respectively than that in the control calves, however ADG was insignificantly higher by about 608% for the calves fed PP than those fed PF diet. Protein and feed efficiency significantly (p<0.05) improved in PF and PP compared with the control group. Calves fed PP showed the best carcass quality in terms of significantly (p<0.05) higher dressing percentages in calves fed PP (57.1% ) than those fed PF and the control diets, being higher in calves fed PF (55.4%) than the control diet (52.5%). Chemical analysis of meat did not differ significantly. Calves fed PP showed the highest economic feed efficiency (235.4%) as compared to those fed PF (198.5%) and the control (199%) diet.
The current study could conclude that from the nutritional and economical point of view, treatment of CFM with 1% formaldehyde had beneficial effects on growth performance and carcass traits of Friesian calves, in particular at the later stage of suckling period and the early stage of wearing period.
Keywords: calves, protected fat, protected protein, growth, carcass.
Publication year 2003
Pages 637-648
Availability location معهد بحوث الانتاج الحيوانى- شار ع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
serial title Egyptian Journal Nutrition and Feed
Author(s) from ARC
External authors (outside ARC)
    عبد الحميد محمد عبد الحميد جامعة المنصورة
    عبد الخالق السيد عبد الخالق جامعة المنصورة
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Calves. Carcass composition. Growth. Nutrition physiology. Performance testing. Proteins.
Proposed Agrovoc protected fat;
Publication Type Journal
↑