奶牛的骨矿物质变化。高产期低钙和高钙饲喂的影响。
Bone mineral changes in dairy cows. The effect of low and high calcium feeding during the high yielding period.
作者信息
Zetterholm R
出版信息
Acta Vet Scand. 1978;19(1):39-48. doi: 10.1186/BF03547640.
Bone mineral content in two coccygeal vertebrae of 14 cows of Swedish Red and White Breed were investigated using the dichromatic photon absorptiometry. The investigation started at parturition and continued for 120 days. Each animal received a controlled amount of hay, ensilage and concentrate, and the milk yield was measured and registered. Seven cows (group L) received Ca and P close to the ARC standard. The other seven cows (group H) received a 30 % higher amount of Ca and P (15–20 % above Swedish standard) than the ones in group L. The bone mineral content in group L decreased by 10 % up to 90 days postpartum, and thereafter increased. In group H, the mean bone mineral content increased.
使用双色光子吸收法对14头瑞典红白奶牛品种的两尾椎骨的骨矿物质含量进行了研究。研究从分娩时开始，持续120天。每头动物都接受了定量的干草、青贮饲料和精饲料，并测量和记录了产奶量。7头奶牛（L组）摄入的钙和磷接近农业研究委员会（ARC）标准。另外7头奶牛（H组）摄入的钙和磷比L组奶牛高30%（比瑞典标准高15%-20%）。L组骨矿物质含量在产后90天内下降了10%，此后有所增加。H组的平均骨矿物质含量增加。
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