Supplemental wheat bran and microbial phytase could replace inorganic phosphorus in laying hen diets
2006
Yao, J.H.,Northwest A and F Univ., Yangling (China). Coll. of Animal Science and Technology | Han, J.C.,Northwest A and F Univ., Yangling (China). Coll. of Animal Science and Technology | Wu, S.Y.,Northwest A and F Univ., Yangling (China). Coll. of Animal Science and Technology | Xu, M.,Northwest A and F Univ., Yangling (China). Coll. of Animal Science and Technology | Zhong, L.L.,Northwest A and F Univ., Yangling (China). Coll. of Animal Science and Technology | Liu, Y.R.,Shenzhen Kondarl Feed Co., Gaoling (China) | Wang, Y.J.,Shenzhen Kondarl Feed Co., Gaoling (China)
An experiment was conducted to determine the effects of wheat bran (WB) and microbial phytase on production performance and nutrient utilization in laying hens. Three hundred and seventy-five Lohmann hens at 32 weeks of age were randomly allotted to treatments of fifteen hens per pen with five pens per treatment. Five experimental diets were formulated. Diet one (control) contained 0.19% inorganic phosphate (Pi) from dicalcium phosphate. On the basis of diet 1, diets 2 and 3 were formulated to contain WB 5% and 10%, respectively. In diets 4 and 5, the WB was fixed at the level of 10% with Pi level adjusted to 0.14% in diet 4 and completely replaced with 500 U/kg microbial phytase in diet 5. The results showed that the treatment 3 improved egg yield (P=0.142), feed conversion ratio (FCR, P=0.011), utilization of crude protein (CP, P=0.060), total phosphorus (P less than 0.001) and serum Pi concentrations (P=0.016) compared with the control. Ten percent of WB replacing 0.05% Pi did not influence either egg yield or nutrient utilization. The treatment 5 improved FCR (P=0.011), CP utilization (P=0.060) and tP (P less than 0.001), but did not influence either performance or serum variables. The current study suggests that wheat bran could be used successfully in laying hen diets and wheat bran and microbial phytase supplemented together could replace inorganic phosphate completely.
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