给予25-羟基胆钙化醇的肉鸡的生产性能和骨骼发育

Performance and bone development in broiler chickens given 25-hydroxycholecalciferol.

Bar A, Razaphkovsky V, Vax E, Plavnik I

Institute of Animal Science, Agricultural Research Organization, the Volcani Center, Bet Dagan, Israel.

Br Poult Sci. 2003 May;44(2):224-33. doi: 10.1080/0007166031000087029.

Abstract

A series of 5 trials was conducted with Cobb chickens in order to determine the effect of 25-hydroxycholecalciferol (25OHD3) on their performance and bone development under adequate Calcium (Ca) and Phosphorus (P) supplementation, and under moderate dietary restriction of Ca and P. Formulated beadlets of 25OHD3, trade name HY-D (IsoGen, Naperville, IL, USA) were used as the 25OHD3 source. 2. Five to 10 microg of cholecalciferol (vitamin D3) or 25OHD3/kg diet were sufficient to ensure normal body weight (BW) and bone ash in chickens under continuous lighting. The two materials had similar effects on BW and bone ash. 3. In one out of the three experiments, 25OHD3 increased BW and BW gain, while in the others it had a similar effect to that of vitamin D3, or even a slight negative effect in a trial conducted on the floor, in which the diets were supplemented with the D sources at 75 microg/kg. The effects of both D sources on bone ash and on the severity or frequency of tibial dischondroplasia were similar. 4. 25OHD3 restrained the effect of moderate dietary P restriction, but not of Ca restriction, on BW gain and bone ash in 22-d-old chickens. This effect could not be explained by an higher P bioavailability in the 25OHD3-fed chickens.

摘要

为了确定在充足补充钙（Ca）和磷（P）的情况下以及在适度限制钙和磷的日粮条件下，25-羟基胆钙化醇（25OHD3）对科布鸡生产性能和骨骼发育的影响，进行了一系列5项试验。使用商品名为HY-D（IsoGen，美国伊利诺伊州内珀维尔）的25OHD3配方小丸作为25OHD3来源。
在持续光照条件下，每千克日粮中添加5至10微克胆钙化醇（维生素D3）或25OHD3足以确保鸡的正常体重（BW）和骨灰含量。这两种物质对体重和骨灰含量有相似的影响。
在三项实验中的一项中，25OHD3增加了体重和体重增加，而在其他实验中，它与维生素D3的效果相似，或者在一项地面饲养试验中甚至有轻微的负面影响，该试验中日粮中D源的添加量为75微克/千克。两种D源对骨灰含量以及胫骨软骨发育不良的严重程度或发生率的影响相似。
25OHD3抑制了适度日粮磷限制对22日龄鸡体重增加和骨灰含量的影响，但对钙限制没有抑制作用。这种作用不能用饲喂25OHD3的鸡中较高的磷生物利用率来解释。