Phytase and nutrient-energy matrix: a strategic approach to enhancing the performance of broiler chickens fed a corn-soybean meal-based diet

초록

Objective: This study examined the effects of a nutrient matrix with or without phytase on the performance of broiler chicken. Methods: A total of 2,000 day old Ross 308 broiler chickens were assigned to 5 dietary treatments, with 10 broilers per replicate and 40 replicates per treatment. The experimental diets included 1. CON: A corn and soybean meal (SBM)basal diet without phytase. 2, NC1: A cornSBMbased diet with reduced nutrients, specifically 0.13% less phosphorus, 40 kcal/kg less metabolizable energy (ME), and 0.30% less crude protein (CP), without phytase. 3, NC1+PHYT: NC1+500 FTU/kg phytase. 4, NC2: Another cornSBMbased diet with greater nutrient reductions, including 0.16% less phosphorus, 55 kcal/kg less ME, and 0.45% less CP, without phytase. 5, NC2+PHYT: NC2+1,000 FTU/kg phytase. Results: In the pre starter and overall phase, feed conversion ratio (FCR) was higher in NC2 and NC2+PHYT. In the starter phase, body weight gain (BWG) was lower in NC2 and NC2+PHYT. In the grower phases, BWG was lower in NC2, while FCR was higher. At d28, the digestibility of ash was higher in NC1+PHYT, while the digestibility of Ca and phosphorus were higher in NC1+PHYT and NC2+PHYT. At day 42, the digestibility of ash, Ca, and phosphorus were higher in NC1+PHYT and NC2+PHYT. The level of tibia ash was lower in NC2. The level of myoinositol was lower in NC2 at d28, while the level of myoinositol at d42 was lower in NC1 and NC2. Conclusion: We concluded NC1+PHYT showed a higher growth performance comparable to CON, as against the lower performance observed in NC2, NC2+PHYT, and NC1.

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