Comportamento ingestivo de cordeiros Texel e Ideal alimentados com casca de soja

Abstract

SUMMARYThis experiment was conducted in the laboratory of sheep-raising of the Federal University of Santa Maria aiming to evaluate the ingestive behavior of sheep breeds Texel and Ideal, finished in feedlot with diets containing different levels of soybean hulls in place of sorghum silage. Forty male uncastrated lambs were used, 20 from the Texel breed and 20 from Ideal breed, weaned approximately at 50 days and housed in individual pens were randomly divided into four groups according to the level of inclusion of soybean hulls in the diet: 0 %, 33.5 %, 66.5 % and 100 % of soybean hulls in replacement of sorghum silage. The time spent in feed activities, chewing time and the total time spent per meal decreased linearly, while the period of idleness and feeding efficiency of rumination increased linearly with increasing level of sorghum silage substitution by soybean hulls. Texel lambs remained more time on rumination activities and total chewing, spent more time per meal, spent less time in idleness and showed less rumination efficiency when compared with Ideal lambs when confined in the finishing phase. INTRODUÇÃOAtualmente, visando uma maior rentabilidade, a pecuária ovina esta buscando alternativas de alimentação que sejam adequadas do ponto de vista nutricional e ao mesmo tempo viáveis do ponto de vista financeiro. Tendo em vista esta busca, a grande variedade de alimentos passíveis de utilização, que surgem como alternativas

Ingestive behavior of steers finished on soybean hull and/or white oat grain

“…Chewing time has been one of the most studied measures to evaluate fiber effectiveness (13) . Carvalho et al (16) observed that rumination and chewing time decreased linearly with the increasing replacement of soybean hull by sorghum silage.…”

Economicidade E Desempenho Produtivo De Cordeiros Confinados Submetidos a Dietas Com Resíduos Agroindustriais

“…Por outro lado, o valor médio observado para o consumo de FDN de 0,50 kg/dia está de acordo com o verificado por Alves et al (12) , os quais testaram diferentes níveis de energia em dietas para ovinos da raça Santa Inês e observaram um consumo médio de 0,47 kg de FDN/dia, em uma dieta contendo 58,3% de FDN. Baseado nas comparações acima, pode-se afirmar que alimentos com elevado teor de FDN poderão ter sua ingestão restringida e, provavelmente, proporcionar limitação da expressão do potencial genético do animal para produção (13) . Entretanto, no presente estudo, de acordo com os resultados observados e comparados com a literatura, não foram evidenciadas possíveis restrições no consumo de matéria seca, o que permite sugerir que não ocorreu regulação física do consumo dos animais.…”

Performance, eating behavior and carcass characteristics of feedlot lambs fed diets without forage containing sodium bicarbonate

“…The rumination and chewing time expressed in min/d also differed between CONT and SB, being higher for CONT, which can be attributed to the higher NDF content of this treatment, since the rumination time is highly correlated (r² = 0.96) with the consumption of NDF (Welch and Hooper, 1988). The NDF content of food is one of the main factors that influence the ingestive behavior of animals, with lowers amounts of NDF and/or the smaller particle size, less time will be spent on chewing activity (feeding and rumination ;Carvalho et al, 2014).…”