The Changes of Feed Digestibility Measured Using Ileum and Rectum Contents after Force-feeding Chicken.

概要

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To evaluate the feed digestibilities measured using intestinal content of chickens, the contents of lower ileum and rectum were collected every 30 minutes from 1.5 to 8.0h after the force-feeding. The changes of feed digestibilities of the collected contents were measured and compared with those of the feces obtained from the chickens attached an artificial anus.1. The amounts of content in lower ileum were small until 2.5h and after 7.5h after the force-feeding, but those were great from 3.0 to 7.0h after the feeding in all chickens. On the other hand, there is no relationship between the amount of contents in the rectum and time after the force-feeding.2. The feed digestibilities except for crude fiber abruptly increased in content of ileum from 1.5 to 2.5h after the force-feeding. The digestibilities from 3.0 to 7.0h were comparatively stable and almost the same values as those of chickens attached an artificial anus. But, the digestibility showed a tendency to decrease after 7.5h.3. The feed digestibility in content of rectum had a great variation with individ-ual chicken and changed with sampling time. The digestibility except for nitrogen free extract showed a tendency to be lower than those of chickens attached an artificial anus.These results suggest that the measurement of feed digestibility with ileum contents is reasonable from 3.0 to 7.0h after the force-feeding.
日本家禽学会の論文