Net Energy for Growth in Pigs : Application to Low-protein, Amino Acid Supplemented Diets
نویسنده
چکیده
The cost of feed is at least 50% of the total cost of pig meat production with the energy component representing the greatest proportion. Therefore, from a practical point of view, it is important to estimate precisely the energy value of feeds, either for least-cost formulation purposes or for adapting feed supply to energy requirements of animals. Evaluation of energy content of pig feeds is usually based on their digestible (DE) or metabolizable (ME) energy contents. However, the closest estimate of the « true » energy value of a feed is given by its net energy (NE) content which takes into account the metabolic utilization of ME. Therefore, NE systems have been proposed. In addition, NE is the only system in which energy requirements and diet energy values are expressed on a same basis which should be independent of the feed.
منابع مشابه
Effect of Increasing Lysine:net Energy Ratio on Growth Performance and Plasma Urea Nitrogen Concentration of Late-Finishing Barrows Fed Low-Protein Amino Acid-Supplemented Diets and Ractopamine
Low-crude protein, amino acid-supplemented diets containing ractopamine balanced to contain 4.57 to 5.2 g of 1ysinelMcal of net energy can adequately supply amino acids for growth in late finishing pigs. Summary An experiment was conducted to determine the optimum lysine (lys):Net energy (NE) ratio of low-crude protein (CP) amino acid (AA)-supplemented diets needed in cor~jt~nction with racto-p...
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This study was carried out to investigate the apparent digestibility coefficients (ADCs) value of protein, amino acid and energy and body amino acid composition of rainbow trout fed solvent extracted soybean meal (SBM) and full-fat soybean meal (FFS) partly replacing fish meal (FM) in diets. Five iso nitrogenous (average 50.36% crude protein) and energetic (4294 kcal/kg total energy) ...
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تاریخ انتشار 2003