The use of the market-return of food products as ruminant feeds [electronic resource].

Includes references.

Six male Barki sheep were used for digestibility study and three females were fitted with permanent rumen fistulae for rumen fermentation studies. The animals were fed six mixed diets based on (33%) rice straw, (5-14%) meat products (M) as animal protein source and (11-17%) undecorticated cottonseed cake (C) as plant protein source. Replacement of a part of protein sources with I % urea (U) was considered. Maize (Z) (27%) and bakery products (B) (24-37%) were used as sources of energy. The results indicated that, there were significant differences in digestibility coefficients of CP, CF and EE among diets. However, there were no significant differences for DM, OM and NFE digestibility coefficients. The TON values ranged between 68% and 77% for CZ-diet and MBU-diet, respectively, without significant differences. OCP was significantly higher with MBU-diet (9.74%) compared with the other diets. Nitrogen balance value (NB) was highest with MBU-diet (7.64 g/hLd) and lowest with CZ and CB diets; (2.73 and 3.59 g/h/d, respectively) with significant differences. Rumen ammonia-N concentrations (mg / 100 ml RL) were significantly different. ranging between 6.1 and 18.5 mg/100 ml RL for CB-diet and CBU-diet, respectively. However, rates of ammonia-N production values (mg/100 ml RL/hr) were significantly lower for MZ-diet (-0.2) and the significant highest rates were observed for CZ and CBU-diets (4.9 and 3.7, respectively). VFA concentrations were significantly different and ranged between 3.7 and 7.9 (meq/100 ml RL) for MB and CBU-diets, respectively. The same trend was observed for VFA production rates (meq/100 ml RL/hr). Rumen volume values ranged between 8.6 and 4.7 L for sheep fed CB-diet and CBU-diet, respectively, with significant differences. Rates of rumen out flow values were significantly lower for MZ-diet (7.80/01 hr) in comparison with other diets. Microbial protein synthesis showed values between 19.5 and 70.8 (g/d) for MB and CB diets, respectively. From the economical point of view, the diets containing the market return of bakery products showed lower cost of diet than those containing corn. However the diet containing urea, bakery and meat products (MBU) showed the lowest cost of one ton TDN and one kg OCP.

Summary in Arabic.

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