Ketonuria in dairy cows and correlation between ketonuria level and milk production
1998
Nucha Simasatitkul | Ratchanee Supaluckbunlue (Chiang Mai Univ., Chiang Mai (Thailand). Faculty of Agricuture. Dept. of Animal science)
One hundred and fifty six urine samples from 58 Holstein Dairy cows were tested for ketone bodies by Reagent Strip Method once a month for 8 months. There were 25, 23.07, 16.66 and 5.13 percentage of ketonuria cows in group 1,2,3 and 4 (0-30, 31-60, 61-90 and 91-120 days postpartum), respectively, but most of them (81.48 percent) had ketone bodies at level of trace (0.5 mmol/l) and low (1.5 mmol/l). There was only one high milk production cow (30 kg/d) with retained placenta and metritis had high level of ketone bodies (8 mmol/l) on 0-30, 31-60 and 61-90 days postpartum, but decrease to trace (0.5 mmol/l) on 91-120 days postpartum. Statistic analysis showed that number of ketonuria cows did not relate to number of days postpartum (chi square = 6.083, P0.05). Without statistic significance, there were positive correlation between ketonuria level and milk production at the sampling day (r = 0.25, 0.23, 0.20 and 0.23 for group 1,2,3 and 4, respectively, P0.05).
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