糠麸棉粕日粮中植酸酶添加水平对肉鸡生长性能和磷利用的影响

THE EFFECT OF SUPPLEMENTAL LEVELS OF PHYTASE TO A DIET WITH WHEAT AND RICE BRAN-COTTONSEED MAEL ON GROWTH PERFORMANCE AND PHOSPHORUS UTILIZATION OF BROILER CHICKS

选用200羽1日龄艾维茵白羽鸡,在玉米-糠麸-棉、豆粕日粮中,设4个植酸酶添加水平(0、250、500、1000pu/kg)和1个添加磷酸氢钙的标准磷处理,进行35d的试验,探讨了植酸酶添加水平对肉鸡生长性能和磷利用的效果。结果指出,植酸酶添加剂量与肉鸡体增重、血清无机磷呈显著的正线性相关,并与植酸磷表观消化率呈正效应。以体增重为标识,694pu的植酸酶可替代1g由磷酸氢钙提供的无机磷。

A 35d feeding trial using two hundred day-old Avian chickens was conducted to evaluate the effect of the addition of four levels of phytase(0,250,500,1000pu/kg of diet)to diets on growth performance and availability of phytate P for broilers A positive control diet contained 0 47%～0 35% nonphytate P(nP) with dicalcium phosphate The basal diets contained corn-wheat and rice bran-cottonseed and soybean meal The results indicated that phytase additions linearly increased (P<0 01 or 0 05) BW gain,serum inorganic P And the apparent digestibility of phytate P improved with increasing levels of added phytase About 694 pu of phytase could replace l g of inorganic P as dicalcium phosphate based on BW gain