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http://dx.doi.org/10.5536/KJPS.2008.35.2.137

Effects of Single or Mixed Supplementation of Bacterial Phytase and Fungal Phytase on Laying Performance and Nutrient Digestibility  

Kang, H.K. (Poultry Science Division, National Institute of Animal Science)
Park, S.Y. (Nonghyupfeed. Inc.)
Yu, D.J. (Poultry Science Division, National Institute of Animal Science)
Kim, J.H. (Poultry Science Division, National Institute of Animal Science)
Kang, G.H. (Poultry Science Division, National Institute of Animal Science)
Na, J.C. (Poultry Science Division, National Institute of Animal Science)
Kim, D.W. (Poultry Science Division, National Institute of Animal Science)
Suh, O.S. (Poultry Science Division, National Institute of Animal Science)
Lee, S.J. (Poultry Science Division, National Institute of Animal Science)
Lee, W.J. (Daesung Microbiological Labs.)
Kim, S.H. (Poultry Science Division, National Institute of Animal Science)
Publication Information
Korean Journal of Poultry Science / v.35, no.2, 2008 , pp. 137-142 More about this Journal
Abstract
This study was conducted to investigate the effect of single or mixed supplementation of bacterial and fungal phytase using 45-wk-old 450 Hy-Line Brown laying hens housed in individual cages for 12-wk period. The birds were reallocated to have similar egg productivity by examining the egg production for one wk before starting the experiment. Two sources of phytase, bacterial (BP) and fungal (FP), were used either in single or mixture to determine the effects of these phytase. Five dietary treatments consisted of control (BP 0, FP 0), T1 (BP 300, FP 0), T2 (BP 300, FP 300), T3 (BP 300, FP 3000), and T4 (BP 0, FP 3000). The DPU was used for phytase activity in this experiment. The nonphytate phosphorus (NPP) content of control was 0.30%, and those of phytase treatments were set to 60% of the Control. Experimental diets were fed ad libitum throughout the experimental period. The lighting schedule of 17L7D was employed. The egg production was not different between control and bacterial phytase treatments, but the T4 showed significantly low productivity compared to control (P<0.05). No difference was found in average egg weight among all treatments. The daily egg mass did not show any statistical differences among all treatments: however, it was significantly low in T4 compared to ther control during the latter half of the experiment (P<0.05). No significant difference was found among treatments in terms of feed intake, feed conversion and egg quality. The digestibilities of dry matter, crude protein, and fat digestibility were similar regardless of the treatments. No significant trends were detected in Ca and P availability. In conclusion, the BP level of 300 DPU contributed to achieve 40% reduction of recommended nonphytate phosphorus addition. The synergistic effect of bacterial and fungal phytase was not confirmed.
Keywords
bacterial phytase; fungal phytase; laying hen performance; P; NPP;
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