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Articles by H.M.R. El-Sherif
Total Records ( 2 ) for H.M.R. El-Sherif
  O.M. El-Husseiny , A.Z.M. Soliman , H.M.R. El-Sherif and A.M. Fouad
  Objective: The study was designed to investigate the impact of selected essential micronutrients, vitamin A, zinc (Zn) and copper (Cu), on productive and reproductive performance of broiler breeders from 53-72 weeks of age. Materials and Methods: Total number of 96 broiler breeders (72 ♀ and 24 ♂) at 53 weeks of age, were randomly assigned to 8 equal groups of 9 hens each, divided into 3 replicate. The experiment was conducted in a 2×2×2 factorial arrangement of the dietary treatments. Eight experimental diets were formulated using two levels of vitamin A (12500 and 25000 IU kg–1), two levels of Zn (132 and 264 mg kg–1) and two levels of Cu (15.7 and 31.4 mg kg–1) in this study. Results: The diet containing 12500 vitamin A IU kg–1+264 Zn mg kg–1+15.7 Cu mg kg–1 resulted in the best productive (egg production, egg mass and feed conversion ratio) and reproductive performance (fertility, hatchability and day-old chick weight). The optimal level of vitamin A, Zn and Cu resulted 12500 vitamin A IU kg–1, 264 Zn mg kg–1 and 15.7 Cu mg kg–1, respectively. Conclusion: Feeding diet containing 12500 vitamin A IU kg–1, 264 Zn mg kg–1 and 15.7 Cu mg kg–1 would produce best productive and reproductive performances of Cairo B-2 broiler breeders.
  M.M. Hashim , S.A. El-Safty , K.G. El-Eraqi , H.M.R. El-Sherif , T. Azza , K. Marwa , H.M. Ibrahim and A.Y.M. Abdelhady

Objective: This experiment was conducted to assess the beneficial effect(s) of β-mannanase (Lycell® and Hemicell®) supplementation to low energy diet on productive performance, gross energy digestibility, hematological parameters and carcass traits of broiler chicks. Materials and Methods: A total of 540, day old Ross 308 broiler chicks, obtained from local hatchery with mean body weight of 33±0.05 g, were randomly assigned to three dietary treatments, 180 birds each. The treatments were T1 (low energy diet, 80 kcal kg1, as control), T2 (low energy diet +250 g t1 β-mannanase from Lycell® product) and T3 (low energy diet +300 g t1 β-mannanase from Hemicell® product). The parameters recorded were growth performance, carcass traits, haematological and blood biochemical parameters, dropping and litter microbiology, gut histomorphology and digestibility trial. Results: Results demonstrated that β-mannanase improved growth performance (p<0.05) in terms of body weight, weight gain, feed intake and feed conversion ratio from three to five weeks of age. Carcass traits criteria including dressing weight, dressing percentage, and abdominal fat were significantly (p<0.05) affected by β-mannanase while gizzard, heart and spleen weight were not affected by the dietary treatments. Moreover, the dietary treatments did not affect the dry matter digestibility (DMD) and organic matter digestibility (OMD) of broiler. Conclusion: β-mannanase enzymes, either Lycell® or Hemicell®, supplementation should be considered when low energy diets are formulated in broiler.

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