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Effect of egg production level dietary protein and energy on feed consumption and nutrient requirements of laying hens


Effect of egg production level dietary protein and energy on feed consumption and nutrient requirements of laying hens



Poultry Science 55(6): 2166-2171



ISSN/ISBN: 0032-5791

DOI: 10.3382/ps.0552166

This experiment was conducted to better estimate the minimum protein and energy requirements of the laying hen at different production levels. The experiment was also designed to estimate the maintenance level of energy and protein, and to ascertain the amounts of protein and energy needed to produce an egg. Egg production levels of 4.2, 29.8, 49.1 and 70.5% were actually obtained with hormonal therapy (progesterone). The effects of egg production level and dietary energy level on feed consumption were statistically significant. As egg production increased feed intake increased and as energy level increased feed intake decreased. The low producing hens (4.2%) consumed an average of 9.3 g of protein and 182 kcal ME [metabolizable energy]/bird daily. The 29.8% producing hens consumed 2.1 g of protein and 45 kcal ME more than the 4.2% hens. The increase in egg production from 29.8 to 49.1% required an additional 1.1 g of protein and 23 kcal ME. As egg production increased from 49.1 to 70.5% an additional 1.0 g of protein and 19 kcal ME were needed. The maintenance requirement was estimated to be 6.1 g of protein and 156 kcal ME/hen per day. Apparently 15 g of protein and 299 kcal ME/hen per day would be adequate for birds producing 80% or more. As egg production declined to 70%, 13.5 g of protein and 269 kcal ME seemed adequate. Finally, when production declined to 50% 12.5 g of protein and 250 kcal ME/hen per day appeared to be sufficient.

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Accession: 005235462

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