Comparative study on performance evaluation of Kadaknath chicken under intensive and semi-intensive rearing system in sub-tropical region of Jammu

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Date
2022-11-07
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Sher-e-KashmirUniversityofAgriculturalSciences& Technology-Jammu (J&K)
Abstract
The current study was conducted on Kadaknath to evaluate their growth performance under intensive and semi-intensive rearing systems. There were 60 chicks in each system with 3 replicate of 20 chicks.The birds were reared up to the age of sexual maturity (21 weeks). The mean body weight attained, feed intake and feed conversion ratio in intensive and semi-intensive system at 21 weeks of age were; 1581±51.18gand 1426.17±47.43g; 14167.11±22.01g and 11174.67±34.51g; and 8.11±0.67 and 6.65±0.31 respectively and varied significantly in both rearing systems. Carcass quality characteristics viz. dressing percentage, bursa weight, thymus weight and spleen weight in intensive and semi-intensive system at the end of 21 weeks were 66.92±1.82% and 63.19±1.88%; 1.99±0.24g and 1.65±0.13g; 3.69±0.69g and 2.55±0.38g; 1.70±0.19g and 1.64±0.13g respectively. The results of sensory evaluation and texture were comparable for both systems. Blood biochemical observation for glucose, total protein, albumin, globulin and A: G ratio at 21 weeks were 245.64±1.0.11mg/dl and 233.17±1.30mg/dl; 3.65±0.12g/dl and 3.53±0.6g/dl; 2.53±0.12g/dl and 2.49±0.15g/dl; 1.45±0.11g/dl and 1.42±0.08g/dl; 1.84±0.24 and 1.82±0.20. Enzyme activity of ALT, AST, ALP were found to be 19.21±0.15U/L and 18.88±0.59U/L; 121.57±0.41U/L and 119.95±0.36U/L; 104.43±0.22U/L and 103.82±0.32U/L respectively. The length of digestive tract which was found to be comparable in two treatments except for the length of small intestine which was found to be more in semi-intensive system. Histological studies revealed increased length and width of intestinal villi and increased depth of crypts of the chicks reared in semi-intensive then in intensive system of rearing. Benefit cost ratio for intensive rearing system is 0.58and for semi-intensive system is 0.70. The results suggested that Kadaknath could be reared economically in semi-intensive system as compared to intensive system.
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