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日粮中维生素D3含量对笼养蛋鸡骨矿含量及骨显微结构的影响

邓益锋， 侯加法

（南京农业大学 动物医学院， 江苏 南京 210095）

摘要： 将175只10周龄伊莎蛋鸡随机分为A、B、C、D、E共5组，分别在每千克饲料中添加维生素D3(VD3)0、100、200、500和1000IU，试验期10周。试验期间每隔2周测定骨矿含量。试验开始及结束时杀鸡取胫骨，进行组织学检查。试验结束时，A、B、C、D、E组骨矿总平均值分别为0.668g/cm2±0.082g/cm2、0.679g/cm2±0.102g/cm2、0.692g/cm2±0.103g/cm2和0.668g/cm2±0.081g/cm2、0.647g/cm2±0.079g/cm2。C组骨矿含量显著高于A、D、E组（P<0.05）。骨组织学检查亦显示，试验开始时，青年蛋鸡皮质骨、骨小梁正常；试验结束时，低VD3组和高VD3组皮质骨都出现了不同程度吸收腔增多的现象，且严重程度与VD3缺乏或过量程度呈正相关性。试验结果表明，青年蛋鸡日粮中添加适宜剂量的VD3，可增加骨量，维持良好的骨结构。

关键词： 维生素D3； 骨矿； 组织病理学； 青年蛋鸡

中图分类号：S 856.5 文献标识码： A 文章编号：1000-6419(2004)10-0019-04

Effect of vitamin D3 concentration in cage layer diet on bone 
mineral content and microstructure

DENG Yifeng, HOU Jiafa

(College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China)

Abstract: One hundred and seventyfive 10weekold ISAcage layer hens were randomly divided into 5 groups:A,B,C,D and E. The Group A,B,C and D were fed with the standard diet, to which vitamin D3(VD3) was added at the dosage of 0,100,200,500 and 1000IU per 1kg diet respectively, during the next 10 weeks. Bone mineral content (BMC) of hen tibia were measured every 2 weeks. At the beginning and end of the experiment， respectively, 5 hens were killed and their tibia were collected for histopathological research. At the end of experiment, the total mean BMC of Group C (0.692g/cm2±0.103g/cm2) was significantly higher than those of Group A,D and E(P<0.05). The result of histopathology suggested that young hens corticalbone and bone trabecula were normal at first, finally there were different grade resorption lacunain the cortical bone. The lesion was related close to both VD3 deficiency and excess. It was concluded from the abovementioned results that temperate addition of VD3 may improve BMC, maintain satisfactory bone structureand play an important role in prevention osteoporosis.

Key words: vitamin D3; bone mineral content; histopathology; young layer

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