ORIGINAL PAPER
Effect of supplemental phytase to laying hen diets of different phosphorus content
 
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Institute of Animal Production, Department of Feed Science and Animal Products, 32-083 Balice, Poland
Publication date: 1997-08-19
 
J. Anim. Feed Sci. 1997;6(3):369–378
 
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ABSTRACT
The experiment was carried out on 216 Hisex brown hens, aged 48-70 weeks, divided into 12 groups of 18 birds kept in single cages. Layers were fed diets containing 0.45, 0.52 and 0.58% total P (0.25, 0.30, 0.35% available P) supplemented with 0, 150, 300 or 450 units of microbial phytase (FTU) per kg. At 54, 62 and 70 weeks of age, eggs and egg-shell quality were analysed. Level of P and phytase had no effect on feed intake, laying rate, yolk percentage and albumen:yolk ratio. Eggs were heaviest (65.1 g) when no phytase was added or when the diet containing the lowest P level was fed (P ≤ 0.01). Specific gravity, shell breaking strength, shell thickness, shell percentage and shell index (density) were highest when the diets were supplemented with 150 FTU/kg, regardless of the P level. However, differences were significant (P ≤ 0.05) only for shell breaking strength and thickness. On the diets supplemented with 450 FTU, some parameters of egg-shell quality were worse than without the addition of microbial phytase. However, a much smaller number of cracked and broken eggs was found when phytase was added.
 
CITATIONS (2):
1.
The Effect of Phytase on Production Performance, Egg Quality, Calcium and Phosphorus Excretion, and Fatty Acids and Cholesterol Concentration in Hy-Line Layers Fed Diets Containing Rice Bran
Mojtaba Habibollahi, Masoud Arab Abousadi, Peyman Nakhaee
The Journal of Applied Poultry Research
 
2.
Effects of Different Sources of Microbial Phytase on Production Performance of Brown-Egg Layers Fed Diets Containing a High Level of Rice Bran
B. Tangendjaja, T.K. Chung, J. Broz
Journal of Applied Poultry Research
 
ISSN:1230-1388