Please use this identifier to cite or link to this item:
Title: Microbial phytase supplementation increases net energy of a wheat-soybean meal diet
Contributor(s): Wu, Di  (author); Swick, Robert A  (author)orcid ; Wu, Shubiao  (author)orcid ; Choct, Mingan  (author)orcid 
Publication Date: 2014
Handle Link:
Abstract: Reports about the impact of supplemental phytase on metabolisable energy (ME) have been inconsistent. However, ME does not consider partitioning of energy for maintenance, product, or heat increment. Net energy (NE) is a more meaningful measure to evaluate the response of broilers to phytase application in this regard. To date, few data can be found on the effect of microbial phytase on dietary net energy. The current study assessed the impact of three phytase products supplemented at an unconventional high level (all at the inclusion rate of 1000 FTU / kg feed) on net energy of broilers using the indirect calorimetric method (IC). The four treatments were: control, which is a wheat-soybean meal (SBM) based diet with reduced available phosphorus (aP) (2.0 g/kg) and calcium (Ca) (6.0 g/kg); control + intrinsically thermostable 'E. coli' phytase A (phytase A); control + intrinsically thermostable 'E. coli' phytase B (phytase B); control + coated 'E. coli' phytase (phytase C). On d 21, 32 male broilers (Ross 308) were allocated to 16 closed-circuit chambers. The adaptation period was four days and then heat production was calculated by applying the Brouwer equation to measurements of O2 consumption and CO2 production from 25 d to 27 d. ME was determined by the total collection method and NE was calculated as fasting heat production (450 kJ/BW 0.70) + energy gain (Noblet et al., 2010).
Publication Type: Conference Publication
Conference Details: APSS 2014: 25th Annual Australian Poultry Science Symposium, Sydney, Australia, 16th - 19th February, 2014
Source of Publication: Proceedings of the Australian Poultry Science Symposium, v.25, p. 66-66
Publisher: University of Sydney
Place of Publication: Sydney, Australia
ISSN: 1034-6260
Fields of Research (FoR) 2008: 070204 Animal Nutrition
Fields of Research (FoR) 2020: 300303 Animal nutrition
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Socio-Economic Objective (SEO) 2020: 100411 Poultry
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Publisher/associated links:
Appears in Collections:Conference Publication
School of Environmental and Rural Science

Files in This Item:
3 files
File Description SizeFormat 
Show full item record
Google Media

Google ScholarTM


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.