Digestible lysine for 63 to 103 day-old barrows of genetic lines selected for lean deposition

Eduardo Ianino Fortes,Leandro Alebrante,Alysson Saraiva,Francisco Carlos De Oliveira Silva,Gabriel Cipriano Rocha,Matheus Faria De Souza,Rita Flávia Miranda De Oliveira,Juarez Lopes Donzele

doi:10.1590/s1516-35982011001000015

Eduardo Ianino Fortes, Leandro Alebrante + Show 6 more

Open Access

https://doi.org/10.1590/s1516-35982011001000015

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Abstract

Ninety-six barrows from 63 to 103 days of age were used to evaluate the effects of dietary digestible lysine levels on performance and carcass traits of two genetic lines selected for lean deposition. Pigs with initial body weight of 23.800 ± 1.075 kg were allotted in a completely randomized block design, within a 4 × 2 factorial arrangement (four digestible lysine levels: 0.80, 0.90, 1.00, 1.10%, and two genetic lines), with six replicates and two pigs per experimental unit. There was no interaction between genetic and digestible lysine levels. The digestible lysine levels also did not influence performance or carcass traits of pigs; however, average daily lysine intake increased with increasing digestible lysine level in the experimental diets. Pigs from genetic line B had better carcass traits when compared with those from genetic line A. The level of 0.80% digestible lysine corresponding to a daily intake of 16.60 g digestible lysine meets the nutritional requirement of pigs from both genetic lines evaluated, from 63 to 103 days of age.

Highlights

Values of amino acids’ digestibility must be taken into account in the formulation of pigs’ diet to reduce costs and maximize animals’ performance
In experiments to determine the requirement of digestible lysine, it is essential to consider the ratios of the essential amino acids with lysine in the diets to avoid variations in the pigs’ performance
When the level of supplementation of an essential amino acid is inadequate, performance may be limited by the amino acid that is deficient in the diet, the level of dietary lysine is adequate

Summary

Introduction

Values of amino acids’ digestibility must be taken into account in the formulation of pigs’ diet to reduce costs and maximize animals’ performance. This study was conducted to evaluate levels of digestible lysine in diets for barrows 63 to 103 days of age from two genetic lines selected for meat deposition.

Results

Conclusion