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Yazar "Sobhi, Basant Mohsen" seçeneğine göre listele

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    Effect of nano-hydroxyapatite as an alternative to inorganic dicalcium phosphate on growth performance, carcass traits, and calcium and phosphorus metabolism of broiler chickens
    (Assiut University, Faculty of Veterinary Medicine, Department of Animal Medicine, 2020) Sobhi, Basant Mohsen; Ismael, Esam Yousef; Mansour, Ahmed Sadek; Elsabagh, Mabrouk; Fahmy, Khaled Nasr El-Din
    The influence of nano-hydroxyapatite (NHA) as a source of calcium (Ca) and phosphorous (P) alternative to inorganic dicalcium phosphate (DCP) on the performance, carcass traits, and the Ca and P contents in serum, bone, and excreta was evaluated in broiler chickens. One-day-old un-sexed Arbor Acres Plus broiler chickens (n.= 160) were randomly assigned to four treatment groups of four replicates with 10 birds in each replicate. The birds received, for 35 days, one of four isocaloric isonitrogenous experimental diets differing in DCP and NHA inclusion levels as follows: diet 1 served as control and contained 2% DCP (100% DCP); diet 2 contained 1% DCP plus 0.1% NHA (50% DCP); diet 3 having 0.5% DCP plus 0.1% NHA (25% DCP); diet 4 having a 0.1% NHA only (0% DCP). The NHA was prepared by the wet chemical method and was shown to have Rod-like shape with 20-100 nm size, 98% purity, 30.8% Ca and 11% available P. Results indicated that the dietary supplementation of 0.5% DCP plus 0.1% of NHA (diet 3) or 0.1% of NHA (diet 4) decreased the excreted P (P ? 0.05) without negative impacts on growth performance parameters compared to control group. There was no difference (P > 0.05) in the carcass characteristics and serum Ca-P profile of broilers among the four dietary treatments. There was no difference (P > 0.05) in the tibia bone ash as well as the Ca and P levels among experimental diets. Thus, dietary supplementation of 0.1% of NHA can be safely used instead of inorganic DCP in broiler diets. © 2011-2020 JAVR. All rights reserved.
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    Influence of combined yeast-derived zinc, selenium and chromium on performance, carcass traits, immune response and histomorphological changes in broiler chickens
    (Assiut University, Faculty of Veterinary Medicine, Department of Animal Medicine, 2020) Sobhi, Basant Mohsen; Ismael, Esam Yousef; Elleithy, Ebtihal; Elsabagh, Mabrouk; El-Din Fahmy, Khaled Nasr
    This study was carried out to assess the effects of dietary supplementation of yeast-based Zn, Se, and Cr on growth performance, carcass characteristics, immune response, and histomorphological changes in broiler chickens. A total of 1092 one-day-old unsexed broilers of Ross 308 strain were randomly al-located into two equal treatment groups (6 equal replicates/ group). Birds were fed the dietary treatments from day 1 to day 35 of age. The first group was fed a basal diet without yeast-based Zn, Se and Cr supplementation (control). The second group was fed a basal diet supplemented with 1.5 mg, 0.15 mg and 2 µg / kg diet of Zn, Se, and Cr, respectively. The yeast-based Zn, Se and Cr increased (P<0.05) the growth rate, carcass traits and improved feed conversion ratio compared to control. The antibody titer against avian influenza and the relative weight of bursa, thymus and spleen were increased (P < 0.05) in broilers supplemented with yeast-based Zn, Se, and Cr compared with the control. The intestinal villi height and crypt depth and bursa diameters were increased in broilers fed the yeast-based Zn, Se and Cr supplemented diet. In addition, there was an increase in the lymphocytic infiltration in the bursa and a decrease in germinal centers in the submucosal lymph nodules of the ileum of birds supplemented with yeast-based Zn, Se and Cr compared to the control. In conclusion, dietary supplementation of yeast-based Se, Cr, and Zn in combination could improve growth performance, carcass traits, immune responses and histo-morphological parameters in broiler chickens. © 2011-2020 JAVR. All rights reserved.

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