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- W2170673339 abstract "___________________________________________________________________________ In several research publications, phytase supplementation was shown to liberate phytate bound phosphorus and nutrients, resulting in an improvement in production. However, these improvements differ depending on the level and type of commercial phytase used. A 32 day experiment evaluated the matrix values for a newly developed phytase (HiPhos) and the effect different commercial phytase enzymes had on the production parameters of broilers fed maize soya bean diets. A number of 5120 chickens were divided into 64 pens. Eight treatments with eight replicates were allocated to the pens in a randomized design. Treatments were: 1) Positive control (CON); 2) CON minus the matrix values for 1000 FYT HiPhos (NEG1000); 3) CON minus the matrix values for 1500 FYT HiPhos (NEG1500); 4) NEG1000 + 500 FTU Phyzyme (PHY); 5) NEG1000 + 1000 FYT HiPhos (HP1000); 6) NEG1000 + 500 FTU Natuphos (NATU); 7) NEG1000 + 1500 FYT Ronozyme (RZ); NEG1500 + 1500 FYT HiPhos (HP1500). Reducing the nutrients in the diets according to the matrix values of HiPhos phytase did not significantly influence body weight. Supplementation with 1500 FYT HiPhos phytase (HP1500) resulted in the highest body weight gain and this was the only treatment group that significantly differed from the Neg1500 treatment group. Therefore the matrix values for 1500 FYT HiPhos were verified. Feed and water intake were not affected by phytase supplementation. Significant differences for feed conversion ratio existed between the CON and NEG1500 group. Liveability was not affected by the treatments. An improvement in the European Production Efficiency Factor was noted in the positive control, HiPhos 1500 and Phyzyme treatments when compared to the NEG1500 group. ____________________________________________________________________________ *keywords: weight gain, live weight, feed intake, FCR, HiPhos matrix values Stellenbosch University http://scholar.sun.ac.za" @default.
- W2170673339 created "2016-06-24" @default.
- W2170673339 creator A5012978925 @default.
- W2170673339 date "2014-04-01" @default.
- W2170673339 modified "2023-09-27" @default.
- W2170673339 title "Evaluation of phytase enzymes on performance, bone mineralisation, carcass characteristics and small intestinal morphology of broilers fed maize soya bean diets" @default.
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