Desempenho de frangos de corte consumindo rações contendo sorgo e gérmen integral de milho

Abstract

RESUMO -Avaliou-se a substituição do sorgo pelo gérmen integral de milho em rações para frangos de corte. Foram conduzidos dois experimentos, em delineamento inteiramente casualizado com quatro níveis de substituição do sorgo pelo gérmen integral de milho (0; 33,3; 66,7 e 100%) como concentrado energético em rações com ingredientes de origem vegetal (experimento 1) ou de origem animal (experimento 2), cada um com quatro repetições. Avaliaram-se o desempenho (ganho de peso, consumo de ração e conversão alimentar) e o rendimento de carcaça e de cortes, em peso absoluto, em porcentagem do peso vivo e em porcentagem do peso da carcaça depenada e eviscerada. Performance of broilers fed sorghum and full-fat corn germ mealABSTRACT -In this experiment, sorghum substitution with full-fat corn germ meal was evaluated in feed for broiler chickens. Two experiments were carried out in a randomized complete design with four levels of substitution of sorghum substitution with full-fat corn germ meal (0, 33.3, 66.7 and 100%) as energetic concentrate in diets produced exclusively with vegetable ingredients (experiment 1) or with ingredients of animal origin (experiment 2) with four replications each.Performance (weight gain, feed intake and feed conversion) were evaluated and the carcass and cuts yield, at absolute weight, expressed as percentage of live weight or eviscerated or plucked carcass. In experiment 1, a quadratic effect was observed for final weight and weight gain, that were best at the 21.03 and 21.8% levels of sorghum substitution with full-fat corn germ meal. In experiment 2, a quadratic effect was observed weight gain and feed conversion, that were best at the 35.02 and 15.75% levels of sorghum substitution with full-fat corn germ meal. Sorghum substitution with full-fat corn germ meal did not affect carcass yield or the yield for the cuts in experiment 1. In experiment 2, a quadratic effect was observed for carcass, breast and wing weight. Sorghum can be replaced by full-fat corn germ meal in feeds containing only plant ingredients from 21.03 to 21.68% and in feeds containing ingredients of animal origin from 15.75 to 35.02%.

Implications of the use of sorghum in broiler production

“…Those authors argue that the obtained results are due to the similar nutritional values of corn and sorghum, and therefore, it is possible to formulate diets with close nutritional values, especially for metabolizable energy and amino acids using both sorghum and corn. Although literature results are controversial (Santos, 2006;Rocha et al, 2008;Stringhini et al, 2009), in general, the replacement of corn by sorghum in broiler diets does not compromise performance, as observed in the present study.…”

“…On the other hand, Stringhini et al (2009) found a quadratic effect on broiler final weight and weight gain, when corn was replaced by sorghum at levels of 21.03% to 21.68% compared with the other tested diets with high percentage of addition of sorghum; however, the tested diets did not affect other performance parameters or carcass yield. The results of Robertson & Perez-Maldonado (2006) showed worse feed conversion ratio when broilers were fed a sorghum-based diet than with corn based diet.…”

Effects of dietary sorghum and triticale on performance, carcass traits and meat pH in broiler chickens

“…The results of our study are consistent with previous reports of others (Garcia et al, 2013;Torres et al, 2013;Stringhini et al, 2009;Rocha et al, 2008;Santos et al, 2006) who did not find any differences in feed intake, weight gain or feed conversion when evaluating the growth performance of broilers fed sorghum as partial corn replacement in diets. Zarghi and Golian, (2009) also, revealed that 50% corn replacement with triticale had no negative effect on broiler growth performance.…”