Nutrition of Germfree Japanese Quail (Coturnix coturnix japonica) (II):On the Ratio of Retention of N, Ca, Mg and P during the Growth

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• For six weeks after hatching of Japanese quail, protein efficiency ratio, ratio of apparent digestibility of N and ratios of retention on N, Ca, Mg and P of the germfree birds were compared to those to the conventional birds and of the germfree birds contaminated with bacteria at eighteen days old.<BR>(1) Lower protein efficiency ratios for the germfree birds than for the conventional birds for six weeks and with increased weeks of age for the both groups, except for the second week of the conventional group, were obtained. After contamination of the germfree birds suppressed protein efficiency ratio was observed, and it was recovered afterwards.<BR>(2) Higher ratios of apparent digestibility of N for the germfree birds than for the conventional birds were found, and no appreciable effect on the ratios was shown after contamination.<BR>(3) Highest ratios of retention on N, Ca, Mg and P for the conventional and germfree groups at the first week after hatching and lower ratio of N retention in the germfree birds than in the conventional birds at six weeks of age were obtained. At the third week after contamination, same ratio of N retention for the contaminated birds as for the germfree birds of similar weeks of age was shown.<BR>(4) Higher ratios of retention on Ca, Mg and P in the germfree birds than in the conventional birds were observed for the whole experimental period, except for the first week. After contamination each ratio of retention was decreased.

• 公益社団法人 日本栄養・食糧学会の論文

公益社団法人 日本栄養・食糧学会 | 論文

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