Effect of exogenous enzymes in maize-based diets varying in nutrient density for young broilers: growth performance and digestibility of energy, minerals and amino acids

British Poultry Science
A J Cowieson, V Ravindran

Abstract

1. A total of 192 male broilers (Cobb 500) were used in a growth and digestibility assay, involving a 2 x 2 factorial arrangement of treatments, to assess the effects of an enzyme cocktail of xylanase, amylase and protease in maize-based diets. 2. The following two diets were formulated: a positive control diet containing adequate nutrient concentrations for broiler starters as per breeder recommendations and a negative control diet to contain approximately 0.63 MJ/kg apparent metabolisable energy (AME) and 3% amino acids less than the positive control. 3. A further two dietary treatments were developed by supplementing each control diet with an enzyme product containing xylanase, amylase and protease. 4. Birds fed on the negative control diet had poorer weight gain and feed efficiency than those given the positive control diet. There was no effect of diet or enzyme on feed intake. The digestibility of nitrogen, calcium, phosphorus and most amino acids were unaffected by dietary nutrient density. 5. Supplementation of both the positive and negative control diets with the enzyme improved weight gain and feed efficiency compared with the unsupplemented diets. In the case of the negative control, supplemental enzyme improved perfo...Continue Reading

References

Sep 1, 1994·The Journal of the Acoustical Society of America·J R PotterC W Clark
Apr 23, 2003·Poultry Science·M I GraciaG G Mateos
Apr 10, 1958·The Journal of Nutrition·F W HILL, D L ANDERSON
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Apr 9, 2008·The British Journal of Nutrition·France Bellisle

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Citations

Jun 24, 2008·British Poultry Science·A J Cowieson, V Ravindran
May 13, 2010·British Poultry Science·A J CowiesonV Ravindran
Jul 12, 2014·Poultry Science·B Svihus
Nov 5, 2014·Journal of the Science of Food and Agriculture·Ganapathi Raj Murugesan, Michael E Persia
Jan 6, 2015·Asian-Australasian Journal of Animal Sciences·D E VelayudhanC M Nyachoti
Nov 2, 2014·Asian-Australasian Journal of Animal Sciences·Defu TangYingjun Ru
Sep 14, 2018·Asian-Australasian Journal of Animal Sciences·Amogelang R P DisetlheArno Hugo
Mar 7, 2021·Animals : an Open Access Journal From MDPI·Franciele C N GiacobboCristiano Bortoluzzi

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