低蛋白質飼料あるいは同飼料プラス尿素給与時のニワトリの窒素利用と窒素排泄に及ぼす盲腸結紮の影響

抄録

The effects of cecal ligation on nitrogen utilization and nitrogen excretion were compared between chickens fed on a 5% protein diet and a 5% protein diet plus urea. When a 5% protein diet was fed, total N excretion and N balance were significantly decreased and increased by the ligation of ceca, respectively, which were similar to the responses in chickens fed on a 5% protein diet plus urea. The ligation of ceca in both dietary groups significantly decreased uric acid excretion, but did not affect urea and ammonia excretion. None of blood uric acid, urea and ammonia concentrations were significantly changed by cecal ligation in either dietary group. It is concluded that the ligation of ceca decreases uric acid production and tends to increase N utilization, in similar manners in chickens fed on a low protein diet and a low protein diet plus urea.