Effects of thermostable phytase supplemented in diets on growth performance and nutrient utilization of broilers. (14th February 2021)

• Record Type: Journal Article
• Authors: Song, Tingting; Yu, Caiyun; Zhao, Xu; Chen, Fengliang; Liu, Yanjie; Yang, Chongwu; Yang, Zaibin
• Is Part Of: Animal science journal. Volume 92:Number 1(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-14
• Subjects: broiler -- growth performance -- nutrient utilization -- phytate -- thermostable phytase; Animal culture -- Periodicals; Livestock -- Periodicals; 636
• DOI: 10.1111/asj.13513
• Languages: English
• ISSNs: 1344-3941

Abstract

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.