EFFECT OF LOW PROTEIN DIETS SUPPLEMENTED WITH LYSINE AND METHIONINE ON THE PERFORMANCE OF MUSCOVY DUCKLINGS | ||
| Journal of Animal and Poultry Production | ||
| Article 4, Volume 30, Issue 12, December 2005, Pages 7327-7338 PDF (2.68 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2005.238445 | ||
| Authors | ||
| S. M. Sonbol,1; G. A. Abd EI-Rahman1; R. E. Khidr2; Mona M. Hassan2 | ||
| 1Faculty of Agriculture, Zagazig University. Zagazig, Egypt. | ||
| 2Desert Research Center, Mataria, Cairo, Egypt. | ||
| Abstract | ||
| This experiment was performed to asses response of muscovy ducklings (0- 13 weeks of age) to low protein diets supplemented with lysine and methionine. The corn - soybean meal based experimental diets contained two levels of crude protein were supplemented with lysine and methionine .The influnce of supplemental amino acids was studied within each protein level. The results showed that Muscovy ducklings received low protein(20%) diet with high lysine (1.20%) and 0.83% methionine+ cystine, had significantly (P< 0.05) the highest value of average live body weight (876.60 g) during the starting period (0- 4 w.k). However, during the finishing and the total period ducklings fed on diet contained high protein diet with low lysine and low methionine+cystine, had a highly significant (P < 0.01) increase in body weight, weight gain and improved the feed conversion values. Higher percentage of feather, giblets were recorded in group fed on a diet contained low protein with low lysine and high methionine+cystine%. However, higher percentage of carcass (72.41) was recorded for group fed high protein with low lysine and high methionine+cystine%. The lowest feed cost/kg. gain was (62.50%) recorded by group fed high protein with low lysine and low methionine+cystine levels. It could be recommended in the diet 22% protein, 1.10% lysine and 0.83% methionine+cystine during the starting period (0-5 wk.) followed by diet contained 18% protein, 0.90% lysine and 0.70% methionine+cystine, during the finishing period (5-13 wk.) of age. | ||
| Keywords | ||
| Ducklings; protein; lysine and methionine | ||
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