Milho e soja processados em raÃÃes para leitÃes dos 21 aos 56 dias de idade / Processed corn and soy in diets of piglets in the 21 to 56 Days of age (performance and intestinal morphology)

AUTOR(ES)

PatrÃcia de Azevedo Castelo Branco

DATA DE PUBLICAÇÃO

2003

RESUMO

The present work was conducted in order to evaluate the use of two corn types (common corn - M1 and prÃ-jellied flour of corn - M2) and two soy types (soybean meal - S1 and micronized soy - S2), non processed and processed, respectively, and their combinations in diets of weaning piglets from 21 to 56 days of age. The performance, relative weight of the digestive organs and duodenum and jejunum villus height and crypt depth were evakuated. A total of 112 weaning piglets at 21 days were utilizated, 56 of them being castrated males and 56 females, with medium initial weight of 8,0 kg, in na experimental randomized block design, in factorial scheme 2 x 2, in seven replicates and four pigletss per experimental. There was no interaction of the two types of corn with two types of soy on the performance characteristics (daily mean weight gain, daily mean feed intake and feed:gain ratio), as well as of isolated effects of the factors in the measured variables The relative weight of the liver and large intestine of piglets to the 33 days of age was influenced (P <0,05) for the two soy types, being the largest observed weight when used the soybean meal and the smallest when used the micronized soy. The relative weight of the stomach was influenced by the two corn and soy types (P <0,05), being the largest weight observed for the M1 + S1 combination and the smallest for the M2 + S2 combination. The treatments of the mixtures of M1+S2 or M2+S2 shown higher villi and lower crypt depths (P<0,05). Like this, the use of the pre-jellied flour of corn and the micronized soy in the diets of piglets in the studied age didn t affect the performance, being shown similar to the common corn and to the soybean meal. The combinations of M1+S2 and M2+S2 in the diets shown reduced relative weight of the digestive organs and the maintenance of the integrity of the intestinal villi of piglets weaning at 21 days.

ASSUNTO(S)

leitÃo farinha de milho flour of corn monogastric nutrition flour of soybean zootecnia farelo de soja soja micronizada piglets suÃno micronized soy swine nutriÃÃo de monogÃstrico

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