Influence of the species on metabolizability of energy of certain feedstuffs in ducks and chicken

V. Chinni Preetam, S. Qudratullah and A. Nageswara Rao
Department of Livestock Production and Management
College of Veterinary Sciences, ANGRAU, Rajendranagar, Hyderabad A.P. –500030

Simultaneous biological trials were conducted with cocks and drakes to evaluate AME and TME of certain feedstuffs by Sibbald, 1977 method, to examine the species differences if any on the metabolizability of energy. Test ingredients were force-fed to four cocks and four drakes each, after 24 hours of fasting. Excreta over a period of 24 hours was quantitatively collected from all the groups. The AME values (kcal/g) were significantly (P <0.05) higher in drakes than cocks for maize (3.92 vs. 3.59), rice broken (3.08 vs. 2.86), de-oiled rice bran (2.27 vs. 1.87), sunflower cake (2.48 vs. 2.15), de-oiled groundnut cake (2.78 vs. 2.50) and soybean meal (2.78 vs. 2.39). The total endogenous excretory losses (EEL) were less in drakes (6.10 kcal) than in cocks (7.48 kcal) and as such the TME values (kcal /g) of cocks and drakes followed a different non specific pattern, for Maize (3.99 vs. 4.05), rice broken (3.28 vs. 3.22), De-oiled rice bran (2.27 vs. 2.41) Sunflower cake (2.55 vs. 2.61), de-oiled groundnut cake (2.92 vs. 2.92) and Soybean meal (2.79 vs. 2.91). The nitrogen correction had no significant influence either on AME or TME values. However, significant (P <0.05) differences between ducks and chicken for both AME and TME values suggest that species variation do exist in the metabolizability of feedstuffs.

Source : IPSACON-2005

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