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Articles by Charles V. Lisnahan
Total Records ( 3 ) for Charles V. Lisnahan
  Charles V. Lisnahan , Wihandoyo , Zuprizal and Sri Harimurti
  Objective: The aim of this study was to determine the effect of the addition of methionine and lysine to feed based on cafeteria standards of native chickens on their growth performance (0-6 weeks). Materials and Methods: A total of 288 days-old native chickens (DOC) were used in this study. The DOC were divided into 4 treatments groups with 4 replications. The treatment diets were T0 and T1 (according to cafeteria and NRC standards) and T2 and T3, which were based on cafeteria standards with the addition of 0.14% methionine and 0.40% lysine for T2 and 0.27% methionine and 0.79% lysine for T3. The data collected were feed intake, body weight, feed conversion ratio and carcass as a percentage of body weight. Results: The results showed that the feed intake of T0, T1, T2 and T3 were 516.97, 556.91, 621.79 and 654.30 g/bird/6 weeks, respectively. The body weights for each group were 219.09, 232.67, 267.16 and 284.61 g/bird/6 weeks, respectively. The feed conversion data were 2.79, 2.80, 2.66 and 2.61, respectively and the carcass percentages were 53.20, 52.75, 54.63 and 56.85%, respectively. Conclusion: Feed formulated to cafeteria standards with the addition of 0.27% methionine and 0.79% lysine (group T3) resulted in the best growth performance.
  Charles V. Lisnahan and Oktovianus R. Nahak
  Objective: This study was conducted to determine the effect of L-threonine and L-tryptophan feed supplementation on body weight gain, feed intake, feed conversion, carcass percentage and abdominal fat of native chickens during the grower phase. Materials and Methods: A total of 112 six-week-old native chickens were randomly divided into 4 treatments and 4 replications, with 7 birds in each replicate. The dietary treatments were: T0 (control feed without L-tryptophan and L-threonine supplementation); T1 (supplementation with 0.07% L-tryptophan and 0.25% L-threonine), T2 (0.14% L-tryptophan and 0.58% L-threonine) and T3 (0.20% L-tryptophan and 0.85% L-threonine). Feed intake, body weight gain, feed conversion ratio, carcass percentage and abdominal fat were measured and the data were analyzed using one-way analysis of variance. Differences between treatments were examined using Duncan’s test. Results: Body weight gain, feed intake, carcass percentage were increased with increasing amounts of L-threonine and L-tryptophan (p<0.05), while the feed conversion was decreased. Meanwhile, the percentage of abdominal fat was similar between the treatments. Conclusion: Feed formulations supplemented with 0.20% L-tryptophan and 0.85% L-threonine (group T3) produced the best growth performance.
  Charles V. Lisnahan , Wihandoyo , Zuprizal and Sri Harimurti
  Objective: This study was conducted to determine the effect of cafeteria standard feed supplemented with methionine and lysine on the growth performance of native chickens during the grower phase (6-14 weeks). Methodology: A total of 240 six week-old native chickens were randomly divided into 4 treatments and 4 replications, with 15 birds in each replicate. The dietary treatments were: T0 (feed based on cafeteria standard), T1 (feed based on protein standard of NRC), T2 (cafeteria feed+0.10% methionine+0.25% lysine), T3 (cafeteria feed+0.23% methionine+0.55% lysine). Feed consumption, body weight gain and feed conversion ratio were measured over the 8 week growing period. At the end of the feeding trial, 32 birds were slaughtered and carcass percentages were determined. Results: Feed consumption of T0, T1, T2 and T3 were 2,671, 2,628, 2,722 and 2,805 g/bird/8 weeks, respectively. The body weight gain for the respective treatments was 692, 677, 747 and 780 g/bird/8 weeks whereas the feed conversion ratio was 3.86, 3.70, 3.65 and 3.60. The percentage of carcass for the four treatments was 59.50, 59.66, 61.36 and 61.55%, respectively. Conclusion: Treatment T3 that had supplementation with 0.23% methionine and 0.55% lysine produced the best growth performance.
 
 
 
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