Avaliação do desempenho e de parâmetros gastrintestinais de frangos de corte alimentados com dietas formuladas com sorgo alto tanino e baixo tanino

Abstract

RESUMOO experimento foi realizado nas instalações experimentais da Faculdade de Medicina Veterinária e Zootecnia da Unesp, Campus de Botucatu e objetivou-se avaliar o efeito das dietas com milho e farelo de soja, sorgo com alto tanino e farelo de soja e sorgo com baixo tanino e farelo de soja sobre o desempenho, rendimento de carcaça e parâmetros gastrintestinais de frangos de corte. Foram utilizados 1200 pintos de corte de um dia, da linhagem Ross 308, distribuídos em 24 boxes em um delineamento experimental inteiramente casualizado em esquema fatorial 3 x 2, três dietas: 100% milho e farelo de soja, 100% sorgo com alto tanino e farelo de soja (SAT) e 100% sorgo com baixo tanino e farelo de soja (SBT) e dois sexos, com 4 repetições de 50 aves cada. O desempenho foi avaliado aos 21, 35 e 42 dias de idade e aos 42 dias de idade, uma amostra de 5 aves por repetição foi abatida para a determinação do rendimento de carcaça e das partes. Foram medidos o rendimento do peito desossado, coxa e sobrecoxa, asas, dorso e gordura abdominal. Aos 14, 21, 28, 35 e 42 dias de idade foram sacrificadas 3 aves por repetição para avaliação do desenvolvimento das vísceras e dos intestinos por meio de pesagens e medidas. Conclui-se que, ao utilizar sorgo com alto tanino (cultivar AG3002 com 1,89 g/kg) e sorgo com baixo tanino (cultivar SAARA com 0,49 g/kg) em substituição ao milho não foi encontrado efeito significativo (p>0,05) para os parâmetros analisados de desempenho e rendimento de carcaça, não ocorrendo também efeito evidente sobre a porcentagem das vísceras e intestinos e as medidas dos intestinos.Termos para indexação: Desempenho, frangos de corte, intestinos, sorgo, tanino. ABSTRACTThe experiment was carried out in the experimental facilities of Faculdade de Medicina Veterinária e Zootecnia of Unesp, Botucatu Campus and the objective was evaluate the effect of corn, sorghum with tannin and sorghum no tannin-based diets on the gastric and bowel parameters in broiler . One thousand and two hundred sexed Ross 308, one-day-old chicks were used, divided in 24 boxes in an completely randomized experimental design with factorial arrangement 3x2, three diets: 100% corn, 100% sorghum with tannin (SAT) and 100% sorghum without tannin (SBT) and two sexes, with 4 replications of 50 birds each The broiler performance was evaluate at 21, 35 and 42 days of age. At 42 days of age, a sample of 5 birds per replication was slaughtered to carcass yield determination. At 14, 21, 28, 35 and 42 days of age 3 birds per replication were slaughtered for the evaluation of guts and bowel development by means of weighing and measurements. It can be concluded that, when using sorghum with tannin (AG3002 crop with 1.89g/kg) and sorghum no tannin (SAARA crop, with 0.49g/kg) replacing corn, there was no evident effect (p>.05) on performance, carcass yield, as well as on guts and bowel percentage or on the bowel measures. INTRODUÇÃOEmbora a utilização do sorgo na alimentação de aves tenha sido muito pesquisada no Brasil nas décadas de setenta e oitenta, o ...

Effects of sorghum on broilers gastrointestinal tract

“…Those authors did not observe any influence of feed physical form on cecum weight. Although Dahlke et al (2003) and Nir et al (1995) demonstrated that dietary particle size affects intestinal weight and size, Garcia et al (2005), did not observe any effect of the substitution of corn by sorghum on intestinal relative weight, which is consistent with the findings of the present study.…”

“…This result was confirmed by Garcia et al (2005), in broilers evaluated at 14, 21, 28, 35, and 42 days of age, did not find any Silva MCA, Carolino ACXG, Litz FH, Fagundes NS, Fernandes E de A, Mendonça GA Effects of Sorghum on Broilers Gastrointestinal Tract differences in proventriculus, pancreas, or liver relative weights when corn and high-or low-tannin sorghum were fed.…”

“…These results are consistent with those reported by Fernandes et al (2008), who compared diets based on ground corn, ground sorghum, ground and wholegrain sorghum (50:50), or whole-grain sorghum for broilers, and did not find any differences in small intestine length. Garcia et al (2005) also found no influence of diets based on corn or low-and hightannin sorghum on small intestine or cecum length of broilers. There was no effect of treatment (p>0.05) on villus height and width, villus distance and absorption surface area in the small intestines, of 42-d-old broilers (Table 7).…”

“…Garcia et al (2005) evaluated the performance and meat quality of broilers, and found no negative effect of corn replacing for sorghum, as well as Morais et al (2002), Pimentel et al (2007) and Rocha et al (2008), who observed that the use of sorghum as an alternative to corn proved advantageous in broilers diets.…”

Litter characteristics and pododermatitis incidence in broilers fed a sorghum-based diet

“…According to Garcia et al (2005), sorghum grain is an alternative feedstuff to corn and may allow significant reduction in feed costs, particularly during times of the year when the cost of broilers fed cornbased diets is high.…”