EFFECT OF FEED RESTRICTION AND VITAMIN C SUPPLEMENTATION ON GROWTH PERFORMANCE, CARCASS CHARACTERISTICS AND SOME BLOOD PARAMETERS OF BROILER REARED UNDER HEAT STRESS

In this experiment, the effect of hydroalcoholic grape seed extract (GSE) and vitamin C feed supplementation on some blood parameters and heat shock protein 70 (<em>HSP70</em> gene) expression of broiler chickens suffering from chronic heat stress was investigated. Experimental diets included control diet (with no additive), 3 levels of GSE (150, 300, 450 mg/kg), and one level of vitamin C (300 mg/kg). Each diet was fed to 5 replicates of 12 male chicks each, from d 1 to 42. The birds suffered from chronic daily heat stress under 34±1°C temperature with 65 to 70% relative humidity for 5 h from 29 to 42 d of age. Results showed that 300 mg/kg GSE supplementation increased body weight of broilers both before and after heat stress condition (at 28 and 42 d, respectively). Also, birds fed 300 mg GSE/kg diet had higher European production efficiency factor during the whole period of the experiment. Supplementation of GSE decreased the concentration of serum glucose at 28 and 42 d; at 42 d (during heat stress condition) and at 450 mg/kg diet it decreased cholesterol, triglyceride, lowand very low density lipoprotein concentration of serum blood. Vitamin C supplementation decreased serum cholesterol concentration of broilers suffering from heat stress. <em>HSP70</em> gene expression in heart and liver of broilers reduced by GSE and vitamin C supplementation pre- and during chronic heat stress condition.

Download Full-text

Effects of early feed restriction on live performance, carcass characteristics, meat and liver composition, some blood parameters, heterophil-lymphocyte ratio, antibody production and tonic immobility duration

Tropical Animal Health and Production ◽

10.1007/s11250-009-9341-8 ◽

2009 ◽

Vol 41 (7) ◽

pp. 1513-1519 ◽

Cited By ~ 7

Author(s):

E. E. Onbaşılar ◽

S. Yalçın ◽

E. Torlak ◽

P. Özdemir

Keyword(s):

Antibody Production ◽

Tonic Immobility ◽

Carcass Characteristics ◽

Blood Parameters ◽

Feed Restriction ◽

Live Performance ◽

Immobility Duration ◽

Lymphocyte Ratio

Download Full-text

Effect of dietary supplementation of some antioxidants on growth performance, carcass composition and breast meat characteristics in quails reared under heat stress

Czech Journal of Animal Science ◽

10.17221/147/2009-cjas ◽

2010 ◽

Vol 55 (No. 5) ◽

pp. 209-220 ◽

Cited By ~ 9

Author(s):

H. Imik ◽

M. Aydemir Atasever ◽

M. Koc ◽

M. Atasever ◽

K. Ozturan

Keyword(s):

Heat Stress ◽

Vitamin E ◽

Vitamin C ◽

Growth Performance ◽

Carcass Composition ◽

Pectoralis Muscle ◽

Breast Meat ◽

B Values ◽

Japanese Quails ◽

L Value

This research investigates the effects of adding vitamin E, vitamin C, vitamin E+C, and alpha lipoic acid to feed rations for Japanese quails (Coturnix coturnix japonica) exposed to heat stress. The aspects studied were growth performance, carcass composition and breast meat characteristics. Five groups of quails, containing 50 birds each (250 Japanese quails: 150 female and 100 male) were used. The 21-days-old birds were fed for a period of 21 days, and they were kept in a controlled environment with a temperature of 34˚C between 08:00 and 17:00 and a temperature of 24˚C for the remaining part of the day. The five groups under study included: a control group without any additive (BS), a group fed diets with vitamin E (BSE), with vitamin C (BSC), with vitamin E+C (BSEC) and with lipoic acid (BSLA). The supplement additions to the diets did not affect the growth performance and carcass composition of the birds. The TBA (malonaldehyde) value of the BS group was significantly higher (P < 0.001) than in the other groups. L*, a*, and b* values in muscle samples, superficialis pectoralis muscle (SPM) and deep pectoralis muscle (DPM), were determined. In the samples from the SPM, the L* value of the BS group was higher than in the BSC group; the a* value of the BSE group was higher than in the BS group; and the b* value of the BSC group was higher than in the BS group (P < 0.05). In the samples from the DPM, the L* value of the BS group was higher than in the BSEC group (P < 0.05); the a* values of the BSE and BSEC groups were higher than in the BS group (P < 0.05); and the b* values of the BSC, BSEC and BSLA groups were higher than in the BS group (P < 0.01). In the microbiological analysis of meat, total aerobic mesophilic bacterial counts of the BS and BSE groups were higher than the counts in the BSC, BSEC, and BSLA groups (P < 0.01); coliform bacterial counts were higher in the BSE group than in the BSC group (P < 0.05); and lactic acid was higher in the BSE and BSEC groups than in the BSC and BSLA groups (P < 0.01). In conclusion, the supplemented antioxidants did not exhibit any significant effect on growth performance, but they significantly decreased lipid oxidation in the meat.  

Download Full-text