Effects of thermostable phytase supplemented in diets on growth performance and nutrient utilization of broilers |
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| Authors: | Tingting Song Caiyun Yu Xu Zhao Fengliang Chen Yanjie Liu Chongwu Yang Zaibin Yang |
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| Institution: | 1. College of Animal Sciences and Technology, Shandong Agricultural University, Tai’an, P. R. China;2. College of Agriculture and Forestry Science, Linyi University, Linyi, P. R. China;3. Jinan Bestzyme Bio-Engineering Co., Ltd, Ji’nan, P. R. China;4. Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada |
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| Abstract: | Phytase is an enzyme that has the ability to release phosphorous (P) from phytate by hydrolyzing inositol-phosphate linkages. Recently, thermostable phytases have gained great consideration because the reduction in phytase activity was found when exposed to heat during feed pelleting. In this study, the effects of the granular thermostable phytase (Aspergillus niger) on growth performance and nutrient utilization of broilers were investigated. A total of 96 21-day-old Arbor Acres broilers were randomly distributed into six treatments including basal diet (control) and basal diet supplemented with 500, 1,000, 2,000, 4,000, 8,000 U of phytase/kg. In general, the metabolizable energy (ME) and the apparent and true availability of dry matter (DM), organic matter (OM), ether extract (EE), crude protein (CP), and amino acids (AA) showed both linearly (p < .01) and quadratically (p < .01) increase with increasing levels of phytase in the diet. Additionally, diet supplementation with phytase could improve (p < .05) body weight (BW), average daily gain (ADG), and feed/gain (F/G) on day 42 compared with the control. The results suggested that diet supplementation of the granular thermostable phytase in the crumbled pellets could improve chicken growth performance and nutrient utilization. |
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| Keywords: | broiler growth performance nutrient utilization phytate thermostable phytase |
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