Low phytic acid barley improves performance, bone mineralization, and phosphorus retention in Turkey poults

Journal of Applied Poultry Research

Volumn 10, Issue 2, 2001, Pages 178-185

  Li, Y C ^a   Ledoux, D R ^a   Veum, T L ^a   Raboy, V ^b   Zyla, K ^c  

^a UNIVERSITY OF MISSOURI   (United States)

^b United States Department of Agriculture   (United States)

^c UNIVERSITY OF AGRICULTURE IN KRAKOW   (Poland)

Author keywords

Barley; Bioavailability; Low phytic acid; Phosphorus; Poults

Indexed keywords

AVES; HORDEUM; HORDEUM VULGARE SUBSP. VULGARE; MELEAGRIS GALLOPAVO;

EID: 0035640199     PISSN: 10566171     EISSN: None     Source Type: Journal    
DOI: 10.1093/japr/10.2.178     Document Type: Article

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15. A 1-g sample of grain was mixed with 20 mL of 0.2M citrate buffer (pH 5.5) in 1M NaCl solution and extracted on a magnetic stirrer at 30°C for 30 min. The slurry was centrifuged, and the clear supernatant was cooled on an ice bath and served as a source of enzyme. One milliliter of enzyme solution was pipetted into 1 mL of 5 mM sodium phytate solution and incubated for 120 min. The reaction was stopped by the addition of 2 mL 15% TCA. The concentration of P was determined by the standard Fiske Subbarow method. One unit of phytase activity was defined as the amount of enzyme that frees 1 μmol inorganic P from 1.5 mM-sodium phytate/min at pH 5.5 and 37°C.
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