An attempt to define the sodium requirements of lactating dairy cows in a tropical environment

W. Thiangtum, A. Yawongsa, J.T. Schonewille, T. Rukkwamsuk, C. Yuangklang, M.W.A. Verstegen, W.H. Hendriks

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

BACKGROUND: Lactating dairy cattle in the tropics may require more sodium (Na) owing to the hot and humid climatic conditions. It is unknown whether the current recommendations on Na for lactating cows can be quantitatively used in tropical countries. This study attempted to define the Na requirement of lactating dairy cows under tropical conditions by measuring Na levels in saliva, milk and faeces. RESULTS: The concentrations of Na and potassium (K) in milk, faeces and serum were not affected by dietary treatments. The amount of Na absorbed by cows fed the basal (low-Na) diet containing 0.4 g Na kg-1 dry matter (DM) was equal to the amount of Na lost in the milk, showing that these animals were fed an Na-deficient ration. This observation was corroborated by salivary Na and K levels, with the cows on the low-Na diet having salivary Na concentrations below 120 mmol L-1 in combination with salivary K concentrations above 20 mmol L-1 (P <0.05). CONCLUSION: Consumption of a daily ration formulated to contain the current Na requirement set by the NRC appears to provide too much Na for lactating cows under tropical conditions. A tentative value of 1.2 g kg-1 DM is proposed as the Na requirement for dairy cows under tropical conditions. Copyright © 2011 Society of Chemical Industry
Original languageEnglish
Pages (from-to)2333-2337
JournalJournal of the Science of Food and Agriculture
Volume91
Issue number13
DOIs
Publication statusPublished - 2011

Fingerprint

Milk
dairy cows
Sodium
sodium
cows
Feces
milk
Diet
feces
Saliva
Potassium
saliva
diet
dairy cattle
tropics
potassium
Serum
animals

Keywords

  • acid-base status
  • potassium-chloride
  • mineral metabolism
  • dietary-sodium
  • heat-stress
  • responses
  • supplementation
  • magnesium
  • bicarbonate
  • absorption

Cite this

Thiangtum, W. ; Yawongsa, A. ; Schonewille, J.T. ; Rukkwamsuk, T. ; Yuangklang, C. ; Verstegen, M.W.A. ; Hendriks, W.H. / An attempt to define the sodium requirements of lactating dairy cows in a tropical environment. In: Journal of the Science of Food and Agriculture. 2011 ; Vol. 91, No. 13. pp. 2333-2337.
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abstract = "BACKGROUND: Lactating dairy cattle in the tropics may require more sodium (Na) owing to the hot and humid climatic conditions. It is unknown whether the current recommendations on Na for lactating cows can be quantitatively used in tropical countries. This study attempted to define the Na requirement of lactating dairy cows under tropical conditions by measuring Na levels in saliva, milk and faeces. RESULTS: The concentrations of Na and potassium (K) in milk, faeces and serum were not affected by dietary treatments. The amount of Na absorbed by cows fed the basal (low-Na) diet containing 0.4 g Na kg-1 dry matter (DM) was equal to the amount of Na lost in the milk, showing that these animals were fed an Na-deficient ration. This observation was corroborated by salivary Na and K levels, with the cows on the low-Na diet having salivary Na concentrations below 120 mmol L-1 in combination with salivary K concentrations above 20 mmol L-1 (P <0.05). CONCLUSION: Consumption of a daily ration formulated to contain the current Na requirement set by the NRC appears to provide too much Na for lactating cows under tropical conditions. A tentative value of 1.2 g kg-1 DM is proposed as the Na requirement for dairy cows under tropical conditions. Copyright {\circledC} 2011 Society of Chemical Industry",
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author = "W. Thiangtum and A. Yawongsa and J.T. Schonewille and T. Rukkwamsuk and C. Yuangklang and M.W.A. Verstegen and W.H. Hendriks",
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An attempt to define the sodium requirements of lactating dairy cows in a tropical environment. / Thiangtum, W.; Yawongsa, A.; Schonewille, J.T.; Rukkwamsuk, T.; Yuangklang, C.; Verstegen, M.W.A.; Hendriks, W.H.

In: Journal of the Science of Food and Agriculture, Vol. 91, No. 13, 2011, p. 2333-2337.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - An attempt to define the sodium requirements of lactating dairy cows in a tropical environment

AU - Thiangtum, W.

AU - Yawongsa, A.

AU - Schonewille, J.T.

AU - Rukkwamsuk, T.

AU - Yuangklang, C.

AU - Verstegen, M.W.A.

AU - Hendriks, W.H.

PY - 2011

Y1 - 2011

N2 - BACKGROUND: Lactating dairy cattle in the tropics may require more sodium (Na) owing to the hot and humid climatic conditions. It is unknown whether the current recommendations on Na for lactating cows can be quantitatively used in tropical countries. This study attempted to define the Na requirement of lactating dairy cows under tropical conditions by measuring Na levels in saliva, milk and faeces. RESULTS: The concentrations of Na and potassium (K) in milk, faeces and serum were not affected by dietary treatments. The amount of Na absorbed by cows fed the basal (low-Na) diet containing 0.4 g Na kg-1 dry matter (DM) was equal to the amount of Na lost in the milk, showing that these animals were fed an Na-deficient ration. This observation was corroborated by salivary Na and K levels, with the cows on the low-Na diet having salivary Na concentrations below 120 mmol L-1 in combination with salivary K concentrations above 20 mmol L-1 (P <0.05). CONCLUSION: Consumption of a daily ration formulated to contain the current Na requirement set by the NRC appears to provide too much Na for lactating cows under tropical conditions. A tentative value of 1.2 g kg-1 DM is proposed as the Na requirement for dairy cows under tropical conditions. Copyright © 2011 Society of Chemical Industry

AB - BACKGROUND: Lactating dairy cattle in the tropics may require more sodium (Na) owing to the hot and humid climatic conditions. It is unknown whether the current recommendations on Na for lactating cows can be quantitatively used in tropical countries. This study attempted to define the Na requirement of lactating dairy cows under tropical conditions by measuring Na levels in saliva, milk and faeces. RESULTS: The concentrations of Na and potassium (K) in milk, faeces and serum were not affected by dietary treatments. The amount of Na absorbed by cows fed the basal (low-Na) diet containing 0.4 g Na kg-1 dry matter (DM) was equal to the amount of Na lost in the milk, showing that these animals were fed an Na-deficient ration. This observation was corroborated by salivary Na and K levels, with the cows on the low-Na diet having salivary Na concentrations below 120 mmol L-1 in combination with salivary K concentrations above 20 mmol L-1 (P <0.05). CONCLUSION: Consumption of a daily ration formulated to contain the current Na requirement set by the NRC appears to provide too much Na for lactating cows under tropical conditions. A tentative value of 1.2 g kg-1 DM is proposed as the Na requirement for dairy cows under tropical conditions. Copyright © 2011 Society of Chemical Industry

KW - acid-base status

KW - potassium-chloride

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KW - heat-stress

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KW - supplementation

KW - magnesium

KW - bicarbonate

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