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The effect on laying performance of low protein diets at the middle and latter stages in laying hens



The effect on laying performance of low protein diets at the middle and latter stages in laying hens



Research Bulletin of the Aichi-ken Agricultural Research Center 0(28): 357-361



An experiment was conducted with 300 White Leghorn laying hens to determine the effects of low-protein diets on egg size, egg weight and egg production. The birds of the control were fed an 18% protein diet throughout the experimental period (21 to 80 weeks of age). The birds of treatment 2(T2) and treatment 3(T3) groups were changed to 16% and 14% protein diets respectively, after 32 weeks of age. The birds of treatment 4(T4) and treatment 5(T5) groups were fed 16% and 14% protein diet, respectively, after 52 weeks of age. The results were as follows. 1. A decrease in the egg weight was observed in all treatments of low-protein diets. The reductions in T2, T3, T4 and T5 were 0.7g, 1.6g, 1. Bg and 1.8g, respectively, compared to the control. Therefore, the total percentages of MS+M+L egg sizes were increased in the birds fed the low-protein diets. 2. A reduction in egg production was also observed in all treatments with low-protein diets. The reductions for T2,T4 (fed 16% protein diet) and T3,T5(fed 14% protein diet) were 1 apprx 2% and 3 apprx 5% respectively compared to the control.

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Accession: 009568634

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