Mananoligossacarídeos, ácidos orgânicos e probióticos para leitões de 21 a 49 dias de idade

EnglishAn experiment was conduced using two hundred piglets maintained from twenty one to forty nine days of age under sanitary challenge, to know effects of mannan oligosaccharides, organic acids and probiotics about performance, gastrointestinal pH and feces score. An experi- mental design of randomized blocks with five treatments, ten replicates and four animals by experimental unity was used. The treatments were constituted by diet without additive, diet with mannan oligosaccharides, diet with acidifier and probiotic, diet with combination of mannan oligosaccharides, acidifier and probiotic and diet with antimicrobials. In the period from 21 to 35 days the animals fed the diet without additive presented larger feed intake, while those fed diet with acidifier and probiotic presented smaller weight gain. In the periods from 36 to 49 days and total larger weight gain for piglets with antimicrobials in relation to diet without additive and acidifier and probiotic was observed. Piglets of diet without additives presented worses feed:gain relations in total period. The feces scores and pH values were not influenced by the treatments. Diets supplemented with mannan oligosaccharide or mannan oligosaccharide, acidifier and probiotic propitiated similar perfor- mance for pigs from twenty one to forty nine days of age fed diet with antimicrobials. portuguesFoi conduzido experimento utilizando 200 leitoes de 21 a 49 dias de idade sob desafio sanitario, objetivando-se investigar os efeitos de dietas com mananoligossacarideos, acidos orgânicos e probioticos sobre o desempenho, pH gastrointestinal e escore de fezes. Utilizou-se o delineamento experimental de blocos ao acaso com cinco tratamentos, dez repeticoes e quatro animais por unidade experimental. Os tratamentos foram constituidos por dietas sem aditivos; com mananoligossacarideos; com acidificante e probiotico; com mananoligossacarideos, acidi- ficante e probiotico e com antimicrobianos. De 21 a 35 dias os animais do tratamento sem aditivos apresentaram maior consumo de racao, enquanto aqueles alimentados com acidificante e probiotico apresentaram menor ganho de peso. Nos perio- dos de 36 a 49 dias e total observou-se maior ganho de peso para dietas com antimicrobiano em relacao a dieta sem aditivos e com acidificante e probiotico. Os animais da dieta sem aditivos apresentaram pior conversao alimentar no perio- do total. Os escores de fezes e os valores de pH nao foram influenciados pelos tratamentos. Dietas suplementadas com mananoligossacarideos ou com mananoligossacarideos, acidificante e probiotico propiciaram desempenho semelhante aquelas com antimicrobianos para leitoes de 21 a 49 dias de idade.