Affiliation:
1. Department of Animal Husbandry, Faculty of Agriculture, University of Timor, East Nusa Tenggara 85613, Indonesia.
Abstract
Background and Aim: The amino acid content of feed can affect growth performance of poultry during the first 6 weeks of life or the starter phase. Unlike for broiler and layer chickens, there is no information concerning standard requirements for tryptophan and threonine during the starter phase. This study aimed to determine the amount of threonine and tryptophan that should be supplemented in chicken feed to maximize growth performance and small intestinal morphology of native chickens during the starter phase.
Materials and Methods: A total of 128 day-old native chickens were divided into four treatment groups with four replications based on a completely randomized design. The treatment diets were as follows: T0 (control feed); T1 (T0+0.10% L-tryptophan+0.35% L-threonine); T2 (T0+0.17% L-tryptophan+0.68% L-threonine); and T3 (T0+0.25% L-tryptophan+1.00% L-threonine).
Results: The feed intake was highest for the T2 and T3 groups (123.06 and 124.18 g/bird/week, respectively). The T3 group had the highest body weight gain (49.35 g/bird/week) and carcass weight (201.44 g/bird) relative to the other groups, while the T2 and T3 groups showed similar, significant (p<0.05) increases in feed conversion ratio (2.57 and 2.51, respectively) and carcass percentage (60.88 and 60.99%/bird, respectively) compared to the other groups. This study showed villi height, crypt depth, and villi width of duodenum, the highest jejunum and ileum of T3 (1109.00±27.26, 1325.50±75.00, 1229.50±101.68, 225.50±17.52, 236.00±24.81, 219.75±17.25, 192.25±14.41, 191.75±4.79, and 184.75±6.40, respectively) compare to other treatment.
Conclusion: These results indicate that supplementation of feed with 0.17% L-tryptophan and 0.68% L-threonine positively affected the growth performance and small intestinal morphology of native chickens during the starter phase.
Funder
Direktorat Jenderal Penguatan Riset dan Pengembangan
Reference36 articles.
1. Lisnahan, C.V., Wihandoyo, Zuprizal, and Harimurti, S. (2017) Effect of addition of methionine and lysine into diets based on cafeteria stabdars on the growth performance of native chickens at starter phase. Int. J. Poult. Sci., 16(12): 506-510.
2. Chen, Y.P., Cheng, Y.F., Li, X.H., Yang, W.L., Wen, C., Zhuang, S. and Zhou, Y.M. (2017) Effects of threonine supplementation on the growth performance, immunity, oxidative status, intestinal integrity and barrier function of broilers at the early age. Poult. Sci., 96(2): 405-413.
3. Qaisrani, S.N., Ahmed, I., Azam, F., Bibi, F., Saima, Pasha, T.N. and Azam, F. (2018) Threonine in broiler diets: An updated review. Ann. Anim. Sci., 18(3): 659-674.
4. Lisnahan, C.V. and Nahak, O.R. (2019) Effects of L-threonine and L-tryptophan supplementation on growth performance of native chickens during the grower phase. Int. J. Poult. Sci., 18(12): 570-575.
5. Opoola, E., Onimisi, P.A., Ogundipe, S.O. and Bawa, G.S. (2017) Effect of dietary tryptophan levels on growth performance of broiler chickens reared in the hot season under tropical environment. Trop. Subtrop. Agroecosyst., 20(3): 429-437.
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