Journal of Food, Agriculture and Environment

Vol 8, Issue 3&4,2010
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Effects of digestible lysine levels on growth performance, serum metabolites and carcass composition in barrows


Jinping Deng 1, Feng Yang 2, Yulong Yin 3, Zhi-Qiang Liu 3, Fu-Yong Yan 2, Yu-Zhe Zhang 2, Zhiru Tang 2

Recieved Date: 2010-07-20, Accepted Date: 2010-11-06


This study was conducted to investigate the effects of different levels of dietary lysine (DLys) on growth performance, serum metabolites, and carcass composition in growing-finishing barrows fed to achieve a body weight (BW) of about 70 kg from an initial weight of 40 kg. The average daily gain (ADG) and gain:fee (G/F) increased (P<0.05) as the level of DLys increased. The dressing percentage of barrows in the 0.91% DLys treatment group was larger (P<0.05) than that in the other two groups. Other chemical indexes of body composition, including protein, ash, lipid accretion rates and estimated lean yields, were also affected (P<0.05) by the level of dietary DLys. Findings suggest that barrows fed diets providing 14.21 MJ of digestible energy/kg from over a period during which body weight increases from 40 to 70 kg, show the maximum ADG and G/F when the concentration of DLys is 0.91%, which corresponds approximately to an intake of 18.4 g/day DLys and 0.63 g of DLys/MJ of DE, respectively.


Barrows, growth performance, carcass characteristics, digestible lysine, serum metabolites

Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 514-518

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