Effects of elevated dietary levels of pantothenic acid on the performance and carcass traits of swine / Efeitos de níveis elevados de ácido pantotênico na ração sobre o desempenho e características de carcaça de suínos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The purpose of this work was to evaluate the effects of an extra supplementation of pantothenic acid (100 ppm) in the diet on the performance and carcass traits of growing-finishing pigs. Two hundred and eighty eight 70d pigs (body weight: 28.67 ± 1.12 kg) were allotted in a randomized complete block design experiment during 90 days (grower, from 70 to 120 days and finisher, from 121 to 160 days of age) which was carried out on 6 replicates of 12 pigs per treatment. The treatments consisted of the combinations of 2 types of nutritional concentration of feed: standard level and high concentration, with 2 dietary levels of pantothenic acid: 0 and 100 ppm of extra supplementation, in a 2X2 factorial arrangement. The 4 treatments were: "Control" - the standard diet; "High NC" - diet with higher nutritional concentration (NC), containing additional 100 kcal DE/kg and 6% of amino acids; "Control+PA" - the standard diet with an extra supplementation of 100 ppm of pantothenic acid (PA); and "HNC+PA" - high NC diet with an extra supplementation of 100 ppm of PA. The evaluated variables were average daily gain (ADG), average feed intake (AFI) and feed conversion (FC). At the end of experimental period, on the day before slaughter, all pigs were submitted to an ultrasound apparatus (PigLog 105) to determine the carcass traits backfat thickness (BT), longissimus muscle depth (MD) and fat-free lean percentage (LP). An economic assessment of the treatments was also performed. During the growing period, the pigs receiving the higher NC diets had lower AFI (1.935 vs. 2.014 kg, P=0.019) and better FC (2.577 vs. 2.745, P=0.001); those fed with an extra PA supplementation had better ADG (0.748 vs. 0.739 kg, P=0.095) and, as was observed significant interaction between CN and PA supplementation for ADG (P=0.042), the advantage of an extra PA supplementation only occurred at the standard NC (0.755 kg vs. 0.715, P=0.012), and not at the high NC (0.741 kg vs. 0.763, P=0.759). In the overall period, pigs fed with high NC showed lower AFI (2.150 vs. 2.233 kg, P=0.013) and better FC (2.883 vs. 2.993, P=0.005), as well as the pigs receiving extra PA supplementation had better average daily gain ADG (0.757 vs. 0.735 kg, P=0.037) and increased MD (47.7 vs. 46.3 mm, P=0.157), though not significative. The extra supplementation of PA showed to be a potential modifier of swine carcass composition and resulted in a reduction of 2.2% on the feed cost produce fat-free lean meat.

ASSUNTO(S)

pantothenic acid suplementos alimentares para animais nutrition carcass nutrição animal vitaminas hidrossolúveis suínos swine carcaça vitamins ração balanceada

ACESSO AO ARTIGO

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