Effect of energy level and protein source on sheep performance. 1-performance of the weaned lambs
Abstract: A total of 19 male lambs. were used after weaning in an experiment lasted 226 days. Animals were housed and designed by 2x2 factorial designs with two levels of dietary energy (55and66% TDN) and two sources of protein (Soybean meal. SBM) and (Sunflower meal. SFM). Rations were iso- nitrogenous (12%CP) rations. The results indicate that the lambs fed on different diets had similar DM intake. Daily TDN and DCP intake were increased with increasing the dietary energy level, while dietary protein source had no effect on TDN and DCP intake. The dietary protein source had no significant effect on all studied traits. The lambs fed on high energy level resulted in significant increase in average daily gain in body weight. slaughter body weight. empty body weight and tailless hot carcass weight. However, high level of energy had increased feed efficiency as the amount of OM/Kg Body weight gain, DM, OM. CP, EE, NFE digestibility, nutritive values and nitrogen retention. On the other hand. the lambs fed the low energy level diets resulted in better feed conversion as the amount of TDN required producing one Kg L.B. W.. lean percent. bone percent. lean: fat ratio and protein percent on the chemical composition of the meat of the 9-10-11th ribs and increased of the relative weight of head, legs and empty digestive tract to slaughter body weight. The energy level did not significant affect the weight of any of the other parts and dressing percentage relative either to the live body weight at slaughter or to the empty body weight.
Key words: cross-bred lambs, energy level, protein source, digestibility growth and carcass characteristics.
Publication year 2004
Pages 55-67
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى- الجيزة
Availability number
Organization Name
serial title Egyptian Journal of Nutrition and Feeds
ISSN 1110-6360
Author(s) from ARC
External authors (outside ARC)
    ابراهيم محمد صديق جامعة المنوفية
    عبد الحليم قنديل جامعة المنوفية
    بركات محمد احمد جامعة المنوفية
Agris Categories Animal feeding
AGROVOC
TERMS		 Carcass composition. Digestibility. Energy. Growth. Lambs. Performance testing. Proteins. Sheep. Weaning.
Proposed Agrovoc cross-bred lambs;
Publication Type Journal
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