Fattening performance and carcass characteristics of intact and castrated Fars native kids in different fattening periods
2011
Eilami , B | Kianzad , M | Shakerin , S
(P0.05), but in fattening periods of 5 and 6 months were significant (P0.01). Cold dressing percentages in total periods between intact (47.43) and castrate (48.52) groups were not significant (P0.05). Carcass lean and fat deposited percentages in some fattening periods between two groups were significant (P0.05), also carcass lean and fat deposited percentages in total periods of experiment between intact (68.77 and 8.52 respectively) and castrate (65.43 and 12.5 respectively) groups were significant (P0.01). Carcass bone percentages in fattening periods between two groups were not significant (P0.05), also carcass bone percentages in total periods of experiment between intact (21.54) and castrate (20.88) groups were not significant (P0.05). Castration had negative effect on live body weight in the adaptation period and also in the first period of experiment, and this negative effect were continued until the end of experiment. Castration had no adverse effect on daily feed intake and feed conversion ratio. With castration, internal fat (kidney fat, pericardial fat, omental and mesentric fat), soft drops (kidneys, heart, liver, lungs, Spleen and rumen) and carcass fat deposited percentages increased and hard drops (head, hide and feet) and carcass lean percentages decreased. Castration decreased unsuitable smell of kid meat. Although stress of castration had negative effect on live body weight in the beginning of experiment, but due to decrease unsuitable smell of kid meat, fattening of castrated kids in a period of three months is suggested.
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