Skip to main content
padlock icon - secure page this page is secure

Estimation of daily urinary potassium excretion using urinary creatinine as an index substance in prepartum dairy cows

Buy Article:

$52.00 + tax (Refund Policy)

ABSTRACT

In the present study, the daily excretion of potassium (K) in urine (urinary K(UK)) was estimated from a 6 h urine sample using urinary creatinine (UC) as the index substance. All urine was collected from six pregnant Holstein cows at 6 h intervals for 24 h on 3 days of the 4th, 2nd and final week before the expected date of parturition. In total, 72 6 h urine samples were obtained. Daily UC excretion (mg/day per kg bodyweight (BW)) was almost the same for the three sampling days. Daily UC excretion varied among cows from 22.1 to 24.3 mg/day per kg BW with a mean of 22.8 mg/day per kg BW with no significant difference. Thus, daily UC excretion was confirmed to be constant throughout the prepartum period with no differences among individuals. The concentration ratios of K to creatinine ((UK mg/dL)/(UC mg/dL) (UK/UC)) correlated strongly to the hourly K excretions (mg/h per kg BW) (r = 0.952, P < 0.01) in the 6 h urine samples. The differences in the UK/UC ratio between sampling periods were not significant within each cow. Therefore, daily UK excretion (mg/day) can be estimated using the equation: daily UK excretion (mg/day) = daily UC excretion (mg/day per kg BW) × BW (kg) × 6 h urine sample UK/UC, where daily UC excretion can be a given value.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: prepartum dairy cows; urinary creatinine; urinary potassium; urine

Document Type: Research Article

Affiliations: 1: Gifu Prefectural Livestock Research Institute, Yamaoka-cho, Gifu-ken, 2: Gifu Prefectural Chuno Livestock Hygiene Service Center, Minokamo-shi, 3: School of Agriculture, Ibaraki University, Ami-machi, Ibaraki-ken and 4: University Farm, Graduate School of Bioagricultural Sciences, Nagoya University, Togo-cho, Aichi-ken, Japan

Publication date: February 1, 2005

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more