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. 2015 Mar 25;5(2):151–160. doi: 10.3390/ani5020151

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Daily N deposition (ND), depending on Met intake (MetI) and age period of male naked neck chickens. NR_maxT = theoretical maximum for daily N retention (mg/BW_kg^0.67); e = basic number of natural logarithm; bc⁻¹ = efficiency of Met utilization; NMR = daily N maintenance requirement (mg/BW_kg^0.67).