CP Content of the Diet
Body weight of the hens was not affected by the level
of CP of the diets, consistent with the studies of Keshavarz
and Nakajima (1995) and Spratt and Leeson
(1987), who indicated that the mature BW of broiler
breeder hens was more influenced by energy than by
CP intake. In the current trial, birds achieved their mature
BW before the start of the experiment, and thus,
an excess in CP content of the diet was not expected
to affect BW of the hens. These results are in agreement
with the data of Joseph et al. (2000) who did not
observe any difference in BW of broiler breeder hens
when the CP content of the diet was increased from 14
to 18%. These authors also observed an increase in egg
weight in hens fed higher protein level, which resulted
mostly because of an increase in albumen weight. However,
there were no difference in ovary weight, large
yellow follicles weight, or in the number of small yellow
follicles and large yellow follicles and the weight of the
F1 follicle.
CP Content of the DietBody weight of the hens was not affected by the levelof CP of the diets, consistent with the studies of Keshavarzand Nakajima (1995) and Spratt and Leeson(1987), who indicated that the mature BW of broilerbreeder hens was more influenced by energy than byCP intake. In the current trial, birds achieved their matureBW before the start of the experiment, and thus,an excess in CP content of the diet was not expectedto affect BW of the hens. These results are in agreementwith the data of Joseph et al. (2000) who did notobserve any difference in BW of broiler breeder henswhen the CP content of the diet was increased from 14to 18%. These authors also observed an increase in eggweight in hens fed higher protein level, which resultedmostly because of an increase in albumen weight. However,there were no difference in ovary weight, largeyellow follicles weight, or in the number of small yellowfollicles and large yellow follicles and the weight of theF1 follicle.
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