EFFECTS OF PHYTASE AND DCP SUPPLEMENTATION ON PERFORMANCE, EGG QUALITY, SOME SERUM, TIBIA AND EXCRETA CHARACTERISTICS OF BARLEY BASED PROTEIN DEFICIENT QUAIL DIETS
Nese Nuray Toprak, Aydan Yilmaz
Ankara University, Faculty of Agriculture, Department of Animal Science, Ankara, Turkey
nndede@agri.ankara.edu.tr
This research was conducted to determine the effects of phytase or dicalcium phosphate (DCP) supplementation on performance, egg quality, serum total protein (TP), calcium (Ca) and phosphorus (P) level, tibia ash, Ca and P concentration, excreta ash, Ca and P level of barley based protein deficient quail diets. A total of 270, 10 wk old quails were used. Diets were insufficient in available P and had a different crude protein (CP) level (16, 18, 20%). It was made phytase or DCP supplementation on each protein level. At the end of the study, quails had similar body weight, body weight change and feed conversion ratio although feed consumption was affected by the CP level (P<0.05). Egg weight was heaviest in 18, 20% CP level (P<0.05). Albumen index, Haugh Unit, serum TP and excreta P level (P<0.05) were affected by CP percentages of the diet. Phytase increased the serum P concentration (P<0.05). P excretion was lowest in control and phytase groups by 38% (P<0.01). As a result, the CP level of quail diets shouldn’t be lower than 18% and DCP didn’t cause any improvement of the research criteria in the layer period. Phytase can be used in this period if it is economical.
Keywords: barley; DCP; phytase; protein; quail
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