比内地鶏(ロードアイランドレッド×比内鶏)のカルシウムおよびリン要求量

概要

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In order to determine the calcium (Ca) and phosphorus (P) requirements of Hinaijidori aged 42 to 56 days and of both sexes, two experiments were conducted using three parameters, i. e., body weight gain, feed efficiency and ash content of tibia of males and females. The experimental diets contained 0.52% P and five graded levels of Ca from 0.37 to 2.48% in experiment 1, and 0.89% Ca and five graded levels of P from 0.39 to 0.89% in experiment 2. The requirements of Ca and P for the maximum performance of male and female Hinai-jidori were estimated to be less than 0.90 and 0.52%, respectively. However, the dietary P level of males for the maximum development of bone was higher than that for the maximum performance.