Supplementing corn-soybean meal diets for laying hens with phytase improved phosphorus absorption
2005
Ikeda, K.(Fukuoka-ken. Agricultural Research Center, Chikushino(Japan)) | Fukuhara, E. | Nishio, Y. | Taguchi, K.
This study was conducted to evaluate the levels of supplemental phytase which would increase P availability in corn-soybean meal diets and would decrease P excretion in laying hens. Corn-soybean meal diets containing 0.16% available P were supplemented with a phytase content 0, 75, 150, 300 or 450 (phytase units (FTU)/kg diet). We used commercially available fish-meal based diets for the laying hens control group. There was a drop in egg production as expected for the group given the diet of 0 FTU/kg;the group given the diet of 0, 75FTU/kg resulted in increase broken soft-shelled eggs. For the group given the diet of 150FTU/kg, the same increase in broken soft-shelled eggs occurred in older hens (52 to 64 weeks of age, summer term). There was no significant differences in egg production, egg yield, feed consumption and feed per egg between the groups given 150 and 300FTU/kg, and the control group. For the group given corn-soybean meal diets, P excretion decreased intentionally compared with the control group. The cost of 150, 300 FTU/kg diet for producing 1 kg of eggs is almost equivalent or less compared with the cost of the control diet. The results of this study indicated that from 150 to 300FTU/kg diet remained good egg production and decreased P excretion.
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