Parsons et al. (1993) reported that there was a substantial
effect on egg weight and size gradeout by increasing
dietary CP from 16 to 18%. Much of this response
from 20 to 28 wk was probably due to the low
feed intakes, resulting in birds fed the 16% CP diet
having protein and synthetic amino acids intakes below
the NRC (1984) recommended levels. Egg production
(20 to 40 wk) was not influenced by feeding diets containing
16, 18, and 20% CP (Parsons et al., 1993). Diets
that exceeded NRC (1984) percentage requirements for
protein and amino acids are needed to maximize early
egg size, and protein and amino acid intakes exceeding
NRC levels are needed to maximize egg size from 33 to
40 wk (Pesti, 1991; Parsons et al., 1993).
Parsons et al. (1993) reported that there was a substantial
effect on egg weight and size gradeout by increasing
dietary CP from 16 to 18%. Much of this response
from 20 to 28 wk was probably due to the low
feed intakes, resulting in birds fed the 16% CP diet
having protein and synthetic amino acids intakes below
the NRC (1984) recommended levels. Egg production
(20 to 40 wk) was not influenced by feeding diets containing
16, 18, and 20% CP (Parsons et al., 1993). Diets
that exceeded NRC (1984) percentage requirements for
protein and amino acids are needed to maximize early
egg size, and protein and amino acid intakes exceeding
NRC levels are needed to maximize egg size from 33 to
40 wk (Pesti, 1991; Parsons et al., 1993).
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