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Energy in poultry diets
While protein, vitamins and minerals are referred to as nutrients, energy -the 4th and most costly part of the diet- is not a nutrient but the property of energy yielding nutrients. Dietary nutrients that yield energy are protein, fat and carbohydrates. Dietary energy level is the main factor influencing feed intake, as birds will, under normal circumstances, eat to satisfy their energy needs. Therefore the dietary nutrients, protein vitamins and minerals should vary in relation to the dietary energy content of the diet, if they are not to become deficient, with low feed intakes, or overconsumed, with low energy diets. While there are a number of factors, such as level of protein, balance of essential amino acids and perhaps level of some of the other dietary nutrients, that can influence the cost of a diet, the level of dietary energy is usually the main factor influencing diet cost.
Mike Persia (Virginia Tech) talked about body composition and the advantages of this technology when evaluating energy status, during IPPE 2020 in Atlanta, USA....
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Dr. Frances Yan, senior research scientist at Novus International, speaks about the mode of action of a NIR technology to predict TI and soybean meal and its impact on amino acid digestibility of diets combined with the protease of Cibenza® DP 100...
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Bacillus licheniformis-Fermented Products Improve Growth Performance and Intestinal Gut Morphology in Broilers under Clostridium perfringens Challenges (Extract)
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Please let me know Protein and Energy requirements for commercial layers. ...
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Endogenous Amino Acid Flows are Influenced by Age of Broiler Chickens
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DESCRIPTION OF PROBLEM The main interests of animal nutritionists are in biology, not econometrics. As a result, the economic interpretation of feeding practices has practically been ignored in animal nutrition texts and in teaching programs. The development and implementation of easy, customized software models should facilitate the teaching of (and increase interest in) the economic ramifications of choices in animal nutrition and...
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Feed Granulometry and the Importance of Feed Particle Size in Layers
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1. Introduction At times, sorghum provides, either partially or entirely, the feed grain base in Australian pig and poultry diets but it has been associated with sub-optimal or inconsistent growth performance in broiler chickens (Selle et al., 2010a; Liu et al., 2015a). A beneficial characteristic for including sorghum in broiler diets is as a source of energy, which is mainly derived from starch. However, energy...
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Introduction To prevent the risk of developing pathogens resistant to antibiotics and also to satisfy consumer demand for a food chain free of drugs, the use of in-feed antibiotics in the European Union was banned in January 2006, and this policy is being considered in other parts of the world. Consequently, the poultry industry seeks an alternative for antibiotics as growth...
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1. Introduction Xylans, also known as arabinoxylans (AX) and pentosans, are the most abundant hemicelluloses in the cell walls of monocotyledonous plants, such as cereals. The presence of these polysaccharides has a direct negative impact on energy availability of monogastric diets (Choct and Annison, 1990), largely due to the direct effect of soluble AX on increasing digesta viscosity. These negative effects can be combatted by supplementing the diet with endo-b1,...
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Importance of Methionine Nutritionists agree that livestock diets require supplementation with some essential amino acids to increase the efficiency of protein utilization and to reduce nitrogen excretion. Methionine is an essential amino acid and is necessary for growth. Numerous trials have shown that providing adequate levels of methionine are required to maximize performance of poultry and pigs. Additionally, methionine plays biological roles beyond protein synthesis,...
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Sandro Cerrate (Poultry Nutritionist Consultant-Credinser) discussed diet formulation and feed conversion, during IPPE 2020 in Atlanta, USA....
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Sorghum can be utilized to replace corn in areas where corn is not readily available. Serine protease has been proposed to improve the digestibility of sorghum because it could degrade disulfide bonds of kafirin proteins. One experiment was conducted to evaluate the effects of sorghum inclusion level and the addition of a serine protease on chicken live performance from 1 to 35 d of age. Eight treatments from a 4x2 factorial arrangement with 4 inclusion levels of...
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Introduction The influence of protein and energy on growth performance and carcass traits in broiler chickens have been intensively studied in the literature and the investigation is ongoing because the performance of modern broiler chickens improves every couple of years as a result of successfully selective breeding program. However, starch and lipid are the two major source of energy in typical broiler diets and little information about the influence of starch and lipid on...
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Introduction Local chickens constitute a majority of the estimated 170 million poultry birds found in Nigeria and contribute substantially to annual egg and meat production (> 90%) for family consumption and for sale (FAOSTAT 2012; Khobondo et al 2015). In most developing countries these birds are mainly managed extensively in resource-limited/poor or rural households and thereby contribute substantially to their food security. However, such local...
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INTRODUCTION Awareness about the importance of maternal diet on offspring health is increasing. Maternal nutrition is being studied in livestock species as a way of improving offspring growth and production (Rehfeldt et al., 2011; Long et al., 2012; van Emous et al., 2015b). The poultry industry is constantly working to increase carcass yield and obtain a fast growing broiler, and manipulation of maternal diet can be one way of increasing broiler performance (Calini and Sirri,...
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Bacillus licheniformis-Fermented Products Improve Growth Performance and Intestinal Gut Morphology in Broilers under Clostridium perfringens Challenges (Extract)
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The liver plays a key role as being the center of a number of digestive, metabolic and productive activities. Oxidative stress leads to biological damage and is regarded as one of the causes of several pathologies that affect poultry growth. In heat stressed broilers, liver cells...
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1. Introduction Sorghum has been described as an enigmatic grain for chicken meat production because sorghum-based broiler diets have been associated with sub-optimal performance of chickens under Australian conditions (Selle et al., 2013). Six red 'tannin-free' grain sorghum varieties harvested on the Liverpool Plains of New South Wales in 2009 were extensively characterised and compared in broilers offered sorghum-casein diets (Khoddami et al., submitted for publication). On...
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