Digestibilidade, desempenho e características morfofisiológicas do trato digestório de leitões desmamados sob dietas com mananoligossacarídeo

Abstract

Resumo -O objetivo deste trabalho foi avaliar o efeito da adição do prebiótico mananoligossacarídeo (MOS) nas dietas de leitões sobre a digestibilidade dos nutrientes, o desempenho e as características morfofi siológicas do trato digestório. No primeiro experimento, foram utilizados 16 leitões com peso de 24,8±2,79 kg. Utilizou-se o método de coleta total de fezes para determinar a digestibilidade das rações controle e com 0,5% de prebiótico. No segundo experimento, avaliaram-se o desempenho e a incidência de diarreia em 30 leitoas com idade entre 22 e 63 dias e peso inicial de 6,28±1,40 kg. No terceiro experimento, foram avaliados a morfometria intestinal, os pesos relativos do fígado e do pâncreas e o pH dos conteúdos do estômago, intestino delgado e ceco em 15 leitoas com idade entre 22 e 63 dias e peso inicial de 5,74±0,93 kg. No segundo e terceiro experimentos, os tratamentos foram: controle positivo (dieta basal + sulfato de neomicina); controle negativo (dieta basal) e os tratamentos dieta basal acrescida de 0,25, 0,50 ou 0,75% de MOS. Utilizou-se o delineamento em blocos ao acaso. A utilização de diferentes níveis de mananoligassacarídeo nas dietas dos leitões não promove melhorias na digestibilidade dos nutrientes, no desempenho ou nas características morfofi siológicas do trato digestório.Termos para indexação: diarreia, imunidade, nutrição animal, prebiótico, ração. Digestibility, performance and morphophysiological characteristics of the digestive tract of weaned piglets under diets with mannanoligosaccharidesAbstract -The objective of this work was to evaluate the effect of adding mannanoligosaccharides (MOS) to piglet diets on digestibility of nutrients, performance and morphophysiological characteristics of the digestive tract. In the fi rst experiment, 16 piglets with a weight of 24.8±2.79 kg were used. Total feces were collected to determine the digestibility of the control feed and feed with 0.5% prebiotic. In the second experiment, 30 gilts with ages ranging from 22 to 63 days and a mean weight of 6.28±1.40 kg were used to evaluate diarrhea performance and incidence. In the third experiment, 15 gilts ranging from 22 to 63 days in age and a mean weight of 5.74±0.93 kg were used to evaluate intestinal morphology, relative weight of the liver and pancreas, and pH of the stomach, small intestine and cecum contents. In the second and third experiments, the treatments used were: positive control (basal diet + neomycin sulfate), negative control (basal diet) and basal diet with 0.25, 0.50 or 0.75% of MOS added. The experimental design was in randomized blocks. The use of different levels of MOS in piglet diets does not promote better digestibility of the nutrients, performance and morphophysiological characteristics of digestive tract.

Alternatives to antibiotics in diets of weaned piglets

“…Evaluating the effect of antibiotics and different inclusion levels of MOS (0.25%, 0.50%, or 0.75%) in the diets of piglets from 22 to 63 days of age, Santos et al (2010) also observed no effect on VH. However, GHELER et al (2009), in a study with benzoic acid (0.25; 0.50, or 0.75%), observed an increase in VH at all levels of inclusion compared to the control diet.…”

Mannan-oligosaccharide and organic acids for weaned piglets

“…Zhao et al (2012) reported higher feed intake in pigs fed mannan-oligosaccharide diets (0.5%). In contrast, Boas et al (2016), working with a mixture (0.5%) of lactic, formic, and citric acids; Walsh et al (2012), with (2.58 mL L 1 ) propionic, acetic, and benzoic acid; and Santos et al (2010) and Marinho et al (2007), with mannan-oligosaccharide (inclusion levels from 0.2 to 0.75%), did not observe an effect of additives on feed intake. In summary, the effects of organic acids and prebiotics such as mannanoligosaccharide on growth performance are credited to the improvement in nutrient utilisation of the diet and not to an increase in feed intake.…”

Chitooligosaccharide for piglets: effects on performance, viscera and intestinal morphometry

“…The effect of the use of prebiotics for growth, feed intake, and feed efficiency shows a varied response and did not influence piglet performance during the nursery period, for prebiotics such as mannooligosaccharides (CORASSA et al, 2012;SANTOS et al, 2010;SILVA et al, 2012), fructoligossacharides (VISENTINI et al, 2008), and chitooligossacharides (CHEN et al, 2009). However, with COS, some studies have reported better growth and feed efficiency in broilers (HUANG et al, 2005;LI et al, 2007) and piglets Apical villi necrosis 3 0 a 3…”