摘要
选择 48只 178日龄健康罗曼商品蛋鸡，随机分成 4个组，分别饲喂含有效磷 0.08％， 0.12％， 0.15％和 0.25％的日粮。试验期 60 d。结果表明，低磷日粮显著降低产蛋率、饲料消耗和蛋重 (P<0.05)；日粮磷为 0.12％～ 0.15％时，显著提高蛋壳厚度 (P<0.05)。饲喂含磷 0.08％的日粮至 45天，鸡呈现胸骨弯曲；至 50天表现以瘫痪为主要特征的产蛋疲劳综合症。产蛋下降是产蛋鸡磷缺乏症的最早症状，胸骨弯曲、轻瘫为早期的临床指征； X线检查可见骨质密度降低、骨皮质变薄。低磷日粮显著降低血浆 ACP(酸性磷酸酶 )活性 (P<0.05)。低磷日粮显著降低血浆、全血、胫骨、肝脏、心脏、肾脏和蛋黄磷含量 (P<0.05)。上述脏器组织磷含量可作为产蛋鸡磷缺乏症的实验室诊断指标；血浆、蛋黄磷可作为磷缺乏症的早期诊断指标，其临界值分别为 0.4 mg/mL和 1.0％。
Forty－ eight commercial laying hens which is one hundred seventy eight－ old were divided into four group randomly,and fed with 0.08％ ,0.12％ ,0.15％ ,0.25％ available P,respectively.During the sixty－ day experiment,the results indicated that the low－ P diets decreased egg production,feed consumptoin and gee weight(P<0.05).The 0.12％～ 0.15％ available P diets increased egg shell thickness(P<0.05).Feeding the diets in 0.08％ available P,the hens presented sternum bending upto forty－ five day, appeared palsy upto fifty day.The earliest sysptom in laying hens P deficiency was egg production decrease.The sternum bending and light palsy were earlier clinical diagnosis sysptom.X－ rays examination presented bone density and bone cortex thickness decrease.The low－ P diets decreased plasma ACP activity(P<0.05).The low－ P diets decreased plasma,blood,tibia,liver,heart,kidney and yolk phosphorus content(P<0.05).It can be regarded as a laboratory dignosis target.Plasma and yolk phosphorus content had dignosis meaning in early stage of laying hens phosphorus deficiency.Their critical value was 0.4 mg/ml and 1.0％ ,respectively.
出处
《中国家禽》
北大核心
2000年第9期7-10,共4页
China Poultry
