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Effect of Different Levels of Lysine and Fiber Degrading Enzyme on Growth Rate and Gut Development in the Starter Phase of Slow-Growing Ayam SAGA

Nor Izwan Hakimi, N. A.¹, Mohd Noor Hisham, M. N.*¹, Roziatul Erin, A. R.², Sarah, R.², Norham, I.², Muhammad Rusydi, R.², Harivanthan, M.² and Noraini, S.²

¹Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400, Selangor, Malaysia.
²Livestock Science Research Centre, MARDI Headquarters, 43400 Serdang, Selangor, Malaysia

Malaysian J. Anim. Sci. 2024 27(2): 1-19

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This study investigated the impact of varying levels of the essential amino acid lysine and the fiber-degrading enzyme B-mannanase on growth performance and gut morphology in the starter phase of slow-growing Ayam SAGA. The study aimed to optimize the utilization of Palm Kernel Cake (PKC), which is rich in fiber, as a sustainable feed ingredient for monogastric animals. Utilizing a 3x3 factorial design with a Randomized Complete Block Design (RCBD), the experiment involved nine treatment groups with three replicates each. The results revealed that the highest level of lysine (120% NRC) combined with 0.4% B-mannanase (T9) significantly enhanced gizzard weight, jejunal and ileal development (p < 0.05), which correlated with improved Body Weight Gain (BWG) and a reduced Feed Conversion Ratio (FCR) in Ayam SAGA. However, Feed Intake (FI) was not significantly affected by the enzyme-lysine combination. These findings suggest that the optimized combination (120% NRC lysine, 0.4% B-mannanase) can improve nutrient absorption and growth efficiency, potentially enhancing the sustainability of poultry production using PKC-based diets.