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Studies on calcium and phosphorus requirements of laying hens. 1. Influence of egg production on calcium and phosphorus levels



Studies on calcium and phosphorus requirements of laying hens. 1. Influence of egg production on calcium and phosphorus levels



Jap. Poultry Sci 1: 39-46



Laying hens were given diets with 2.1, 3.4, 3.0, 1.9 or 1.6% Ca and 0.7, 0.8, 0.6, 0.8 or 0.6% P. There was no effect on bodyweight, intake of feed or efficiency of feed conversion but more birds died in groups given low Ca and P. Egg production was improved in summer when the diet had Ca 0.34 and P 0.8%; at other times the standards recommended by the U.S. National Research Council (Abst. 6650, Vol. 31), were sufficient.

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