SciELO - Scientific Electronic Library Online

 
vol.42 issue2Particularities of the human-animal interactions relevant to the welfare and productivity of dairy cowsAddition of natural and synthetic carotenoids, in hen feed: effects in the egg quality and storage author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Ciência Rural

Print version ISSN 0103-8478

Abstract

POROLNIK, Glauber Valentim et al. Production of entire male pigs with or without the supplementation of amino acids: performance and feed cost. Cienc. Rural [online]. 2012, vol.42, n.2, pp. 340-345. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782012000200024.

An experiment was carried out to evaluate the performance and feed cost of barrows and boars fed or not with amino acid supplemented diets. Forty-eight animals were used with initial weight of 38.8±0.2kg distributed in a randomized block design with three treatments, being barrows males (CM), boars males (IM) and IM supplemented with 5% of amino acids (IM+5% AA). The treatment had no effect on body weight and weight gain. Feed intake, feed conversion ratio and feed cost were different (P<0.05) among treatments. Average feed intake was of 2.43kg, and the intake observed on CM (P<0.05) was higher at 5.5 and 5.2% in relation to IM and IM+5%AA, respectively. Feed conversion ratio was of 2.28, and the CM showed the worse conversion (P<0.05) at 6.2 and 11.6% in relation to IM and IM+5%AA, respectively. Average feed cost was of R$ 1,82kg-1, being higher (P<0.05) for the CM in relation to IM and IM+5%AA. The sex category (barrows or boars) and amino acid supplementation did not affect body weight and weight gain, but alter feed intake, feed conversion ratio and feed cost.

Keywords : nutrition; weight gain; feed efficiency; males.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese