【作者】 朱连勤； 朱风华； 张凡建； 秦枫；

【Author】 Zhu Lianqin, Zhu Fenghua, Zhang Fanjian, Qin Feng (Dept. of Ani. Sci. and Vet. Med. , Lai Yang Agri. Col. . Shandong 265200. China)

【机构】 莱阳农学院动物医学系；

【摘要】 选360羽7日龄健康的AA肉鸡,随机分成4组,分别饲喂添加无机磷0%、0.2%、0.4%、0.6%的日粮(基础日粮有效礴为0.45%和0.43%).旨在研究高磷日粮对肉鸡胫骨软骨发育不良的致病作用。结果表明.高磷日粮显著降低肉鸡增重和耗料量(P<0.05),28日龄前最明显(P<0.01)。试验至10天.添加0.6%无机磷组,TD发生率达到20%,而其他组未见异常。试验至20天.1-4组TD发生率分别达到0%、6.7%、20%和20%。试验至30天.1-4组TD发生率分别达到40%、33.3%、53.3%和53.3%。高磷日粮呈现降低生长板和骨皮质厚度的趋势。高磷日粮可提高肉鸡TD发生率.在28日龄前优甚。更多还原

【Abstract】 Three hundred and sixty 7 -day -old broiler chickens were selected and divided into four groups randomly and fed the basic diets supplemented with 0% , 0. 2% , 0. 4% , 0. 6% inorganic phosphorus (as (NH4)3PO4), respectively. It was studied the effect of high phosphorus diets on tibial dyschondroplasia of broiler chickens. The results indicated that the weight gain and feed consumption was reduced with high phosphorus diets significantly (P<0. 05). It was the most remarkable befor 28 -day -old (P<0. 01) . The incidence rate of TD reached 20% for the basic diets supplemented with 0. 6% inorganic phosphorus on day 10. Others were normal. On day 20, the incidence rate of TD reached 0%, 6. 7% , 20% and 20% , respectively, as the broilers were fed with the basic diets supplemented with 0%, 0. 2%, 0. 4%, and 0. 6% inorganic phosphorus. On day 30, it reached 40%, 33. 3%, 53. 3% and 53. 3%, respectively. Moreover, the high phosphorus diets appeared the tendency of epiphyseal plate thickness and bone cortical thickness decreasing. These results suggest that the high phosphorus diets can increase the incidence rate of TD in broiler chickens.更多还原