摘要
以玉米—豆粕型日粮(表观代谢能12.21MJ/kg、粗蛋白质20 %、总钙1.0 %、非植酸磷0.21 %)为基础 ,采用斜率比法 ,以饲料级磷酸氢钙为参照物测定饲料级磷酸二氢钙、饲料级骨粉和自制脱氟磷酸钙的相对生物学利用率。选择新生AA品种肉用仔鸡(公母各半)和伊萨褐蛋用仔公鸡各192只 ,各随机等分为12个处理组 ,每处理组设4个重复 ,随机给饲由4种参试物分别配制成非植酸磷水平各自为0.21 %、0.31 %、0.41 %的12种试验日粮 ,试验日粮除总磷和非植酸磷水平外 ,其它各项指标与基础日粮保持一致。试验结果表明 ,含磷矿物质饲料种类影响其相对生物学利用率 ,4种参试物中磷的相对生物学利用率以饲料级磷酸二氢钙最高 ,其次是饲料级磷酸氢钙、骨粉 ,脱氟磷酸钙最低 ,分别约为饲料磷酸氢钙的101.9 %～139.0 %、100 % ,75.7 %～106.7 %和69.9 %～89.1 % ;试验鸡类型(肉仔鸡或蛋用仔公鸡)不影响含磷矿物质饲料相对生物学利用率的测值 ;衡量指标不同导致含磷矿物质饲料相对生物学利用率的测值不同 ,其中以体增重最高 ,胫骨灰分含量最低 ,趾骨灰分含量居中。
The relative bioavailability(RBV)of monocalcium phosphate(MCP)、bone meal(BM) and defluorinated tricalcium phosphate(DETP) was determined using 192 Avian commercial day-old broiler chicks and 192 Isa Brown day-old male chicks fed a basal corn-soybean meal diet(AME12.21MJ/kg,CP 20%,Ca 1.0%,NPP 0.21%)from 0 to 3 week of age with slope ratio method.Dicalcium Phosphate was as a reference standard(RBV=100%).All these phosphates were added to the basal diet to supply 0,0.10%,0.20% levels of NPP.Each of the test diets was fed to 4 pens of 4 broiler chicks each and 4 pens of 4 egg cockerels each.All the test diets had the same composition as that of the basic diet except NPP and toetal phosphorus.The RBV for these phosphates using broilers'body weight gain,tibia ash percentage,toe ash percentage as response criteria were:MCP,139.0%,101.9%,113.7%,bone meal,96.7%,93.1%,85.0%,DFTP,87.3%,89.1%,78.3%,respectively;using egg cockerels'body weight gain,tibia ash percentage,toe ash percentage as response criteria were:MCP,122.1%,102.3,118.0%,bone meal,106.7%,75.7%,90.5%,DFTP,77.6%,69.9%,83.7%,respectively.The RBV calculated from broilers or egg cockerels had non significant difference,but those from body weight gain,tibia ash or toe ash had significant difference.
出处
《动物营养学报》
CAS
CSCD
2000年第1期32-37,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
关键词
仔鸡
生物学利用率
含磷矿物质
饲料
鸡类型
broiler
reletive bioavailability
feed phosphates
chick type
criterion
