Correlation between blood biochemical indexes and milk composition in early lactation cows in dairy cow
10.16303/j.cnki.1005-4545.2017.08.25
- VernacularTitle:泌乳初期奶牛乳成分与血液生化指标相关性研究
- Author:
Runqi LIU
;
Wei YANG
;
Cheng XIA
;
Hongyou ZHANG
;
Yuanyuan CHEN
;
Hongjiang YU
;
Taiyu SHEN
;
Sansi GAO
;
Baoyin HUANG
;
Chuang XU
- Keywords:
ketosis;
dairy cow;
milk composition
- From:
Chinese Journal of Veterinary Science
2017;37(8):1566-1570
- CountryChina
- Language:Chinese
-
Abstract:
Biochemical indexes and blood composition in early lactation health,ketosis and hypocalcemia dairy cows were analyzed to make sure the milk composition characteristics with related diseases,the correlation analysis between early lactating dairy milk composition and blood biochemical were also make in order to provide support for the cattle health assessment.According to theblood index,72 Holstein cows 7-21 d postpartum,were divided into group subclinical hypocalcemia,ketosis test group and control group,24 heads each group.The blood and milk of cows were collected and used to analyze the correlation between blood biochemical indexes and milk composition.The results showed that ketosis and hypocalcemia induced the level of milk protein and non fat milk solids decreased,while the content of citric acid in milk increased.The correlation equation between citric acid in milk and serum NEFA,BHBA and GLU was y=3.192x-0.802,(R2 =0.363),y=4.594x-0.793,(R2 =0.320),y=1.228x+0.775,(R2 =0.261),in which x was the content of citric acid in milk.The results showed that the content of citric acid in milk had positively related to blood NEFA,which could be used as an early marker for the diagnosis of negative energy balance.The levels of BUN and ALB in blood can be used to evaluate the levels of milk protein and urea.
