Process Management

News last update:6 Aug 2012

Positive results with thermostable phytase

Cutting-edge "Thermo Protection Technology" which protects phytase from the adverse effects of high temperatures during feed conditioning and pelleting represents an exciting step forward for the feed industry, scientists from Danisco Animal Nutrition told delegates to the 2007 International Poultry Scientific Forum in Atlanta, Georgia.

Thermo Protection Technology involves applying a coating to the phytase. During independent trials conducted by the Technological Institute at Kolding in Denmark the coated phytase was included in the feed prior to conditioning and pelleting at temperatures of 90°C (194°F) or 95ºC (203ºF). Analysis showed that, relative to unprocessed mash feed, 99% of the phytase activity remained after conditioning and pelleting at 90°C (194°F), whilst at 95°C (203ºF) 96% of the phytase activity remained. This compares with 75% activity at 90°C (194°F) and 66% activity at 95ºC (203ºF) for another commercially-available phytase product that is claimed to have similar thermostable properties.

Effective release
In trials conducted by ADAS in the UK, broilers were fed diets containing either the uncoated or coated new-generation phytase. Liveweight gain, feed conversion ratio (FCR) and tibia ash were then measured. No significant differences were found between broilers fed either the uncoated or the coated phytase, confirming that the coating allows phytase to be released effectively in the bird's gut.

Related links:
Danisco Animal Nutrition
Use of phytase in poultry feed

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