Apparent and true digestibility of amino acids of meat cum bone meal and fish meal in caecectomized roosters
2007
Vasan, P.(Indian Veterinary Research Inst., Izatnagar (India)) | Dutta, N. | Mandal, A.B. | Sharma, K.
The apparent and true amino acid digestibilities of silver fish meal and meat cum bone meal were determined using adult caecectomized roosters. Each test ingredient was offered to six caecectomized and six intact cockerels individually. The apparent digestibilities of indispensable amino acids of fish meal, with the exception of methionine and threonine were significantly higher in caecectomized than in intact birds. Whereas the apparent digestibilities of methionine, cystine, threonine, valine and serine of meat cum bone meal were higher in intact birds in comparison to their caecectomized counterparts. The true digestibilities of all the amino acids of fish meal were similar between caecectomized and intact birds. In contrary, except arginine and phenylalanine, all the essential amino acids of meat cum bone meal had higher digestibility in intact as compared to caecectomized cockerels. The intact cockerels underestimated the apparent amino acid digestibilities of fish meal, while overestimated that of meat cum bone meal. When true amino acid digestibility was taken into account, no significant difference was observed for fish meal between caecectomized and intact cockerels.
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