Effects of inclusion of poultry by-product meal and enzyme-prebiotic supplementation in grower diets on performance and feed digestibility of broilers

Abstract

1. Two experiments were conducted to determine the effects of level of inclusion of poultry by-product and enzyme-prebiotic supplementation on grower diet digestibility and the performance of broilers. 2. Six grower diets were formulated to provide a similar nutrient profile with the exception of using three graded levels of poultry by-product, namely 0, 25, 40 g/kg of the diet with and without supplementation of enzyme preparation at the rate of 1 kg per tonne of feed and prebiotic preparation at the rate of 2 kg per tonne of feed. The experimental diets were used from 3 to 6 weeks of age. 3. Body weights, feed intake and feed conversion efficiency were not affected by poultry by-product; however, enzyme-prebiotic had a significant positive effect on feed conversion efficiency at 0 to 6 weeks in experiment 1. 4. Crude protein digestibility was decreased by feeding the diet containing poultry by-product while ether extract digestibility was increased by poultry by-product at the rate of 25 g per kg of feed only. Dry matter retention, crude fibre digestibility and organic matter retention were not affected by poultry by-product. Dry matter and organic matter retentions, crude protein, ether extract and crude fibre digestibilities were not affected by enzyme-prebiotic. 5. Protein efficiency ratio (PER) values were increased by poultry by-product at the rate of 40 g per kg of feed and addition of enzyme-prebiotic.

Influence of probiotic administration by feed or water on growth parameters of broilers reared on medicated and nonmedicated diets

“…Similarly, inclusion of a phytogenic product through d 21 resulted in significantly improved FCR of broilers during the grower and finisher phases, as well as cumulatively through d 40 of this trial. Similar observations were made by Kirkpinar et al [22], in which FCR was significantly improved during the finisher phase and cumulatively through d 42 of grow-out. Intermittent probiotic application via the water in trial 2 resulted in both enhanced growth and reduced FCR of broilers through d 40.…”

“…Prebiotics fed in broiler diets have been shown to reduce the fecal shedding of Salmonella [21]. Similar to probiotics, prebiotics have been shown to increase BW significantly and to improve FE significantly in broilers [22]. The current study was designed to evaluate the effects of a probiotic, a phytogenic product, or both administered in either the feed or drinking water on performance parameters of broilers fed medicated or nonmedicated diets.…”

A multienzyme preparation enhances the utilization of nutrients and energy from pure corn and wheat diets in broilers

“…However, the availability of these nutrients to poultry is hindered by the presence of rigid cell walls that are composed of poorly digestible components, such as cellulose, hemicellulose, lignin, and ligno-or hemicellulose, which can resist the effects of the endogenous enzymes of poultry [3][4][5][6][7][8]. Adding exogenous multienzyme preparations consisting of xylanase, cellulase, pectase, and glucoamylase to wheat-or corn-based broiler diets is therefore a potential method of improving the nutrient digestibility of poultry feeds [1,2,7,8]. Supplementation of an exogenous multienzyme can complement the endogenous digestive enzymes of broilers and significantly improve the digestibility of corn-and wheat-based diets [9][10][11].…”

Effect of substituting fish meal with poultry by-products meal in broiler diet on nitrogen excretion and litter characteristics

“…The lower performance of the birds fed on PBM in the early ages may have been due to its lower digestibility of this protein source as compared to fish meal. This can be demonstrated by the higher nitrogen excretion (in terms of litter N% in this study) and poorer metabolizability of nitrogen in the birds fed with PBM containing diets as reported by Silva et al (2002) and Kirkpinar et al (2004). There are evidences which suggest that dietary manipulation through incorporation of perfect combinations of different protein sources into broiler diets is a useful means to reduce litter nitrogen content and subsequently ammonia emission from poultry houses (Ferguson et al, 1998).…”