Journal of the Faculty of Fisheries and Animal Husbandry, Hiroshima University Volume 11 Issue 2
1972-12-20 発行

鶏の消化に関する基礎的研究 : VI 嗉嚢摘出が消化に及ぼす影響

Yamatani, Yoji
Otani, Isao
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abstract
The effects of cropectomy on the digestibility of feed have been studied in ten hens with artificial anus. Four digestion tests each of 5 days were carried out in the following order:
1. With control birds
a) fed with all-mash diet,
b) fed with mash-grain diet.
(after the test (1, h) all the birds were cropectomized.)
2. With cropectomized birds
a) fed with all-mash diet,
b) fed with mash-grain diet.
(half of the birds (2, b) were fed with grits.)

Independently to the presence of crop, the digestibility of mash-grain diet was less than the one of all-mash diet. In the case of cropectomized birds, although the digestibility of all-mash diet was only slightly lower than in the case of control birds, yet under mash-grain diet that digestibility lowered considerably. On the other hand a mash-grain diet fed together with grits improved largely the digestibility in the case of cropectomized birds and grew almost equal to that of all-mash diet.

These results indicate how closely the main function of the crop, in digestion, is related to the mechanical work.