Substituição parcial do farelo de soja por proteína texturizada de soja na dieta de leitões desmamados

Abstract

RESUMO -Foram desenvolvidos dois experimentos para avaliação da proteína texturizada de soja (PTS), em substituição parcial ao farelo de soja (FS) na dieta pré-inicial para leitões desmamados aos 21 dias de idade. Em cada um dos experimentos, foram comparados quatro níveis (0, 25, 50 e 75% e 0, 20, 40 e 60%, respectivamente) de substituição do FS pela PTS. No experimento um, a substituição do FS pela PTS proporcionou redução linear da conversão alimentar (CA) no período de fornecimento das dietas e diminuição da incidência de diarréia e da altura média da mucosa intestinal (AMM), com o aumento dos níveis de PTS na dieta. No experimento dois, houve efeito cúbico sobre o ganho de peso diário (GPD) e o peso dos leitões ao final da creche (PM35), com a substituição parcial do FS pela PTS. Não foi possível estimar o melhor nível de substituição do FS por PTS. Foi concluído que a substituição parcial do FS pela PTS na dieta de leitões desmamados aos 21 dias de idade melhorou o desempenho dos leitões na fase inicial após o desmame, mas este efeito nem sempre se prolonga até o final da fase de creche. A substituição do FS pela PTS acarretou redução na ocorrência e na duração da diarréia após o desmame e diminuição das alterações na morfologia da mucosa intestinal.Palavras-chave: desempenho, diarréia, morfologia intestinal, subprodutos da soja Partial Substitution of Soybean Meal by Texturized Soybean Protein in Diets forWeaned Piglets ABSTRACT -Two experiments were carried out to evaluate partial substitution of soybean meal (SM) by texturized soybean protein (TSP) in the pre-starter diet, for piglets weaned at 21 days of age. Four levels (0, 25, 50 and 75% and 0, 20, 40 and 60%, respectively) of replacement of SM by TSP were compared in each experiment. In the first experiment, the replacement of SM by TST showed a feed: gain (FG) linear decrease in the fed period of the diets and reduction the incidence of diarrhea and in the average height of the intestinal mucous (HIM) with the increase of TSP levels. In the second experiment, there was a cubic effect on the daily weight gain (DGW) and on the body weight at the end of the nursery phase (BW35) as the result of partial replacement of SM by TSP. It was impracticable to estimate the best level of replacement of SM by TSP. It was concluded that, partial replacement of SM by TSP in the diets for piglets weaned at 21 days of age improved the performance of piglets at the initial post-weaning period, however, this effect may not to be extended until the end of the nursery phase. The partial substitution of SM by TSP leaded to a decrease in the incidence and length of diarrhea after the weaning, and leaded to a reduction in the intestinal mucous morphology alterations.Key Words: performance, diarrhea, intestinal morphology, soybean byproducts IntroduçãoA dieta fornecida aos leitões imediatamente após o desmame desempenha papel crucial, juntamente com outros fatores, sobre o desempenho dos leitões nesta fase. Tanto o consumo de alimento como a capacidade para digerir certos t...

Performance, intestinal histomorphometry, and blood parameters of post-weaning piglets receiving different levels of soy protein concentrate in the diet

“…Lenehan et al (2007), on the other hand, observed a linear effect on feed/gain during the entire experimental period, as the soybean meal had been completely substituted for one of the studied sources of SPC. In the work of Bertol et al (2001), however, no change was observed in performance variables, corroborating the data of the present work.…”

“…A different result regarding residual effect was obtained by Bertol et al (2001), who evaluated substitution of soybean meal for texturized soy protein (TSP), which was used by the authors to evaluate the effects of the reduction of the levels of glycinine and ß-conglycinine in the diet on piglet performance. They associated the residual effect of the initial phase (15 to 35 days) to the increased feed intake provided by the substitution of soybean meal for TSP in the pre-starter diet (zero to 14 days post-weaning).…”

Morphological and chemical aspects of <i>Chlorella pyrenoidosa, Dunaliella tertiolecta, Isochrysis galbana and Tetraselmis gracilis</i> microalgae

“…C. pyrenoidosa had the highest levels of tryptophan. The essential amino acid profile was similar to that of some legumes such as beans, peas, soybeans, and lentils [52][53][54][55]. All species showed levels of essential amino acids that meet the nutritional requirement recommended by FAO g/100g (FAO/WHO/ UN, 1985) for adults and children (2 -5 years…”