APPARENT METABOLIZABLE ENERGY OF BASAL FEEDS IN ItikPINAS-ITIM (Anas platyrhynchos)

Abstract

An experiment was conducted using 18 growing (10-week-old) female Philippine mallard duck-IP Itim (PMD-IPI) breed to establish the apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn) of the commonly used basal feeds (BF), corn (Co), rice bran D1 (Rb), and soybean meal (Sm). The experiment was carried out by in vivo metabolizable energy (ME) assay that lasted for 102 hours with 54-hour excreta collection period. The experimental design was completely randomized with six replications and one duck per replication. The AME of Co, Rb, and Sm were 3.69, 3.49 kcal/g as fed and 3.10, and 4.07, 3.62, and 3.27 kcal/g DM. While the AMEn were 3.60, 3.35, and 2.55 kcal/g as fed and 3.96, 3.47, and 2.68 kcal/g DM. The AME and AMEn generated on the BF for PMD-IPI were higher than the values by PHILSAN, the primary reference standard of feedstuff nutrient composition matrix in the country required in feed formulation. The experiment results suggest that BF have higher energetic values for PMD-IPI and the breed demonstrates additional efficiency in metabolizing BF energy. Therefore, this will facilitate the formulation of least-cost diets and underpins precision feeding for the breed.