Aline Félix Schneider

Natural zeolites in diet or litter of broilers.

Abstract This study aims to analyse the influence of adding natural zeolites (clinoptilolite) to the diet or litter of broilers and their effects on growth performance, carcass yield and litter quality. Three consecutive flocks of broilers were raised on the same sawdust litter, from d 1 to d 42 of age, and distributed in three treatments (control with no added zeolites, addition of 5 g/kg zeolite to diet and addition of 100 g/kg zeolites to litter). The addition of zeolites to the diet or litter did not affect growth performance or carcass yield. The addition of zeolites to the diet did not influence moisture content of the litter, ammonia volatilisation was reduced only in the first flock and pH of litter was reduced in the second and third flock. However, the addition of zeolites to the litter reduced moisture content, litter pH and ammonia volatilisation in all flocks analysed. The addition of 5 g/kg zeolite to the diet in three consecutive flocks was not effective in maintaining litter quality, whereas the addition of 100 g/kg natural zeolites to sawdust litter reduced litter moisture and ammonia volatilisation in three consecutive flocks raised on the same litter.

Zeólitas naturais na dieta de frangos de corte

RESUMO O objetivo deste trabalho foi avaliar o efeito da inclusao de 0,5% da zeolita natural clinoptilolita na dieta de frangos de corte sobre o consumo de agua, racao e caracteristicas das excretas. Foi conduzido um ensaio em gaiolas metabolicas, com frangos de corte de linhagem comercial, no periodo de 14 a 23 dias de idade. O experimento foi constituido de dois grupos de aves, sendo que um recebeu dieta sem inclusao de zeolitas (controle) e outro dieta com inclusao de 0,5% de zeolita (clinoptilolita) em racoes isonutritivas, em um delineamento inteiramente ao acaso, com 10 repeticoes de 10 aves. Avaliou-se o consumo de agua e de racao, nas excretas, pH, teor de nitrogenio total e umidade. A inclusao de 0,5% de zeolitas naturais na dieta nao alterou (P>0,05) o consumo de agua e de racao e o teor de nitrogenio das excretas, entretanto, reduziu (P<0,05) o pH e a umidade das excretas. Conclui-se que a inclusao de 0,5% de zeolitas naturais na dieta de frangos de corte reduz o pH e a umidade das excretas e pode ser utilizada como aditivo alimentar sem prejudicar o consumo de agua e de racao. Palavras-chave: amonia, clinoptilolita, pH de excretas, umidade das excretas ABSTRACT

Complexo multienzimático e probióticos na dieta de frangos de corte

The aim of this study was to evaluate the growth performance of broiler chickens fed diets with inclusion of probiotics and multienzyme complex and its inclusion with a 3% reduction in the levels of energy and protein. 630 broilers were used, since 14 up to 42 days old, submitted to three experimental diets: diet as nutritional requirements (control); diet as required with inclusion of multienzyme complex and probiotics (100g / ton), and diet with 3% reduction in levels of metabolizable energy and crude protein requirements with inclusion of the additive (100 g/ton). Was observed increase (P 0.05) to the control in all periods analyzed. Diets with reduced energy and protein differed from control (P 0.05) in gain of weight and bio-economic index. During the growing and finishing phases, the inclusion of the multienzyme complex and probiotics in diets for broilers formulated as nutritional requirement does not improve animal performance. With 3% reduction in the levels of protein and energy rations in relation to the requirements and inclusion of multienzyme complex and probiotics consumption increases, however, the body weight, feed conversion, weight gain and bio-economic index do not change.