Effects of fatty acid calcium on content of serum calcium, phosphorus and hydroxyproline of cows.

Twelve Holstein cows were used to examine the effects of fatty acid calcium supplementation on milk production and compositions.The cows were randomly allocated to three groups of four cows in each group,based on parity,days in milk and previous mean milk yield.The cows in the control group was fed on a basal concentrate,the animals in the two trial groups were fed respectively basal concentrate plus 100 g or 200 g fatty acid calcium.The content of serum calcium,phosphorus and hydroxyproline was assayed once a week.The result showed that there were no significant differences in content of serum phosphorus and hydroxyproline among groups(P0.05),daily supplement of 200 g fatty acid calcium increased the serum calcium content after 4 weeks(P0.05).Therefore,the addition of fatty acid calcium did not affect the content of serum phosphorus and hydroxyproline,however,the addition of 200 g fatty acid calcium per day for each cow could enhance the absorption of calcium.