Metabolism of water, sodium, potassium, and chlorine by high yielding dairy cows at the onset of lactation

Journal of Dairy Science
N SilanikoveD Shinder

Abstract

We studied the balance of Na+, K+, Cl-, and water in six high yielding (> 39 kg/d of milk) cows between wk 2 to 1 prepartum and at 2 and 7 wk postpartum during winter in Israel. Cows were fed complete diets; Na+ and Cl- contents exceeded dietary recommendations, and K+ content was equal to dietary recommendations. Milk yield was related positively and significantly to retention of Cl- and K+, indicating that ions that are the main constituents of sweat can limit the ability of cows to express full genetic potential. The highest ion retention was recorded for cows that had the highest dry matter intake and, hence, the highest ion intake. Retention of Cl- was highest for cows that were most efficient in retaining Cl- in the kidney. In hot climates, increasing the concentrations of ions in the diet of early lactation cows according to the actual dry matter intake could prevent or reduce the severity of ion deficiencies. Water turnover rate of the cows was dependent on dry matter intake, milk yield, and respiratory-cutaneous water loss. The milk-free water balance (water turnover rate minus water secreted in milk) could be very efficiently predicted for lactating and nonlactating cows by the following equation: milk-free water bala...Continue Reading

References

Jun 11, 1992·Journal of Dairy Science·J B Holter, W E Urban
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Citations

Nov 21, 2017·Journal of Dairy Science·R J CollierY Xiao
Jun 21, 2016·Journal of Dairy Science·J A D R N AppuhamyP J Kononoff
Mar 26, 2010·Molecular Biology Reports·Yanxin LiuGenlin Wang
May 21, 2020·The Journal of Dairy Research·Ephraim Maltz
Oct 29, 2014·International Journal of Biometeorology·Satyaveer Singh DangiMihir Sarkar
Sep 16, 2005·Journal of Dairy Science·T D NennichE Block
Mar 13, 2014·International Journal of Biometeorology·Satyaveer Singh DangiMihir Sarkar
Nov 10, 2020·EFSA Journal·UNKNOWN EFSA Panel on Animal Health and Welfare (AHAW)Christoph Winckler
Nov 27, 2018·Journal of Agricultural and Food Chemistry·Zhaobing GuHuaming Mao

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