GROWTH PERFORMANCE AND CARCASS TRAITS OF ASSAM LOCAL GOATS UNDER INTENSIVE SYSTEM OF MANAGEMENT
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Date
2017-07
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College of Veterinary Science Assam Agricultural University Khanapara, Guwahati-781022
Abstract
An experiment was conducted to study the growth response, efficiency of feed conversion, carcass characteristics and meat quality parameter and the cost of production of Assam local goats under different system of management.
Twenty goats of one month of age, were randomly selected in village Lachima of Nalbari district, Assam. The goats were randomly divided in two groups comprising of ten kids in each group viz, T0 (Control group) Where goats were reared under extensive system of management with traditional grazing and browsing and T1 (Experimental group) where goats were reared under intensive system of management with ad lib. concentrate and fodder feeding. The average initial (1 month of age) and final (6 months of age) body weight of the goats during the experimental periods under the control and treatment groups were 2.90±0.03 kg and 2.89±0.04 kg and 10.36±0.26 kg and 16.05±0.53 kg respectively. Highly significant difference (P<0.01) in body weight changes were observed between the control and treatment group from 3rd week of the experiment to the 22nd week or till the end of the experiment. The average final body length, height at wither and heart girth of the goats at 6 months of age under the control and treatment groups were 42.44±0.34 and 51.31±1.25, 41.29±0.37 and 49.68±1.06 and 48.29±0.31 and 57.69±1.35 centimetre respectively. Overall changed in body measurement showed highly significant difference between the groups in most of the months. The feed conversion efficiency on DM basis was recorded as 3.49 in the treatment group. No mortality was recorded in both control and treatment group during the experimental period. The average carcass weights in control and treatment groups were 4.89±0.11 and 8.33±0.34 kg respectively, while the dressing percentages were 44.00 and 49.95 in control and treatment group respectively. Highly significant differences (P<0.01) were observed in carcass weight and dressing percentage between control and treatment group. Highly significant difference (P<0.01) was also observed in non-carcass components (weight of heart, drainable blood, fore shank, lung and trachea and skin). Weight of prime cuts (leg, loin, rack, shoulder, breast, flank and neck) also revealed highly significant (P <0.01) difference between control and treatment group. Following sensory assessment, there were highly significant (P<0.01) difference for tenderness, juiciness and overall acceptability. However, significant (P<0.05) differences were observed in flavour and texture between the control and treatment group. The total cost of raising the goats in control and treatment groups were Rs 535.00 and Rs 150.00 while the cost per kg live weight in control and treatment groups were Rs 14.47 and Rs 33.20 respectively. The total incomes by selling meat in control and treatment groups were Rs 1980.00 and Rs 3524.00 respectively. Thus the net income was recorded Rs 1830.00 and Rs 2989.00 in control and treatment groups, respectively.
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