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- Title
EFFECT OF DIETARY CHROMIUM, SELENIUM AND VITAMIN C ON PRODUCTIVE PERFORMANCE AND SOME BLOOD PARAMETERS OF LOCAL STRAIN DOKKI -4 UNDER EGYPTIAN SUMMER CONDITIONS.
- Authors
Attia, Kh . M.; Tawfeek, F. A.; Mady, M. S.; Assar, M.H.
- Abstract
The study was performed to evaluate the effect of chromium (Cr), Selenium (Se) or vitamin C ( Vit. C) alone or combination on productive performance, some blood constituents, oxidative stress marker ( Malondialdehyde MDA), some physiological measurements ( body temperature, respiration rate and blood PH) and immune response to sheep red blood cells ( SRBC ' s) of Dokki - 4 laying hens under hot environmental summer condition in Egypt. A total number of 240 hens plus 24 cocks from Dokki - 4 of 30 weeks old were randomly selected and distributed into eight groups with 3 replicates ( 10 hens+ 1 cock) each . Treatments groups were fed a basal diet (control group) or the basal diet supplemented with either 400 μ Cr/kg diet (Cr group), 25 mg of L - ascorpic acid /kg diet ( vit. C. group), 0.2 mg Se/kg diet (Se group), 400 μ Cr plus 250 mg of L - a scorpic acid/ kg diet (Cr + Vit. C group), 400 μ Cr plus 0.2 mg Se/kg diet ( Cr + Se group), .2 mg Se plus 250 mg l - ascorbic acid/kg diet ( Se + Vit. C. group) and 400 μ Cr plus 0.2 mg Se plus 250 mg ascorbic acid /Kg diet ( Cr+Se+Vit.C group ). All groups were kept under observation for 16 weeks. Supplementing heat - stressed laying hens with Cr, Se or Vit. C alone or combination improved productive performance compared to the control group. Digestability of dry matter, organic matter, crude protein and ether extract were highest in the treated treatments and lowest in the control group ( p 0.05). Retention of Ca, P, Zn and Cu were highest in the treated groups compared to the control group. Furthermore, serum malonialdehyde ( MDA) , cholesterol and glucose concentration decreased , whereas, serum total prot e in, albumin, globulin, Ca and P concentrations increased with dietary Cr, Se, Vit. C alone or combination compared with the control group. However, body . temperature, respiration rate and blood pH were lower in treated groups and higher in the control group. The results showed that high temperature reduced antibody titer against sheep red blood cells. However, Cr, Se or Vit.C supplementation enhanced humeral antibody response against SRBC. The results of this study indicate that, separately or in combination Cr, Se and Vit. C supplementation attenuates the decline in performance and antioxidants status caused by hot climate . Such supplementation may offer protection against hot climate - related decline in performance of local laying hens
- Subjects
CHROMIUM in animal nutrition; SELENIUM in animal nutrition; VITAMIN C in animal nutrition; DIETARY supplements; BIOMARKERS; HENS
- Publication
Egyptian Poultry Science Journal, 2015, Vol 35, Issue 1, p311
- ISSN
2090-0570
- Publication type
Article