Greener Journal of Agricultural Sciences

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Ali et al

Greener Journal of  Agricultural Sciences Vol. 3 (11), pp. 762-768, November 2013.

 ISSN: 2276-7770 

Research Paper

Manuscript Number: EB11091313


Effect of Different Levels of Organic Acids Supplementation on Feed Intake, Milk Yield and Milk Composition of Dairy Cows during Thermal Stress


Amjed Ali1, Sarzamin Khan*1, Muhammad Mobashar1,

Muhammad Inam1, Iftikhar Ahmed1, Nazir Ahmed Khan1 and Mubarak Ali2, 3, Hamayun Khan4


1Department of Poultry Science, the University of Agriculture, Peshawar-Pakistan.

2Animal Nutrition Group, Wageningen University, P.O. Box 338, 6700, AH Wageningen,

the Netherlands.

3Wageningen UR Livestock Research, P.O. Box 65, 8200 AB Lelystad, the Netherlands.

4Department of Animal Health, the University of Agriculture, Peshawar, Pakistan.


*Corresponding Author’s Email: dr.zaminaup @


In many developing countries in the tropics, thermal stress results in lower feed intake, changes in energy metabolism, alterations in endocrine profiles of dairy cows which lead to animal health problems and production losses. Supplementation of organic acids can reduce the toxic metabolites and endocrine changes in the cow’s body during thermal stress. The present study was conducted at University Dairy Farm, The University of Agriculture, Peshawar to determine the effect of supplementing different levels of organic acids solution in drinking water on the milk yield, milk composition, milk somatic cell count (SCC), blood haemoglobin (Hb) and packed cell volume (PCV) of dairy cows during thermal stress. The solution of organic acids was prepared by dissolving 80g citric acid, 90g phosphoric acid, 50g lactic acid and 10g copper sulphate in one litre of distilled water. Twelve Holstein Friesian dairy cows (mid-lactation, 3 to 4 years old) having average body weight of 400kg were blocked into four groups on the basis of parity and milk yield. The cows were offered water without (group A) or with organic acids solution at the rate of 0.5, 1 or 1.5ml per litre of drinking water. The experiment was continued for 30 days along with two weeks adaptation period during the summer months of July and August, 2012. The addition of organic acids to the drinking water increased (P<0.05) feed intake and milk yield. The addition of organic acids significantly increased (P<0.05) the percentage of fat, protein, lactose, solids not fat and total solids in milk, whereas, the SCC decreased. The blood Hb and PCV increased (P<0.05) with the use of organic acids in the drinking water. The results of present research demonstrate that the using organic acids solution in the drinking water of dairy cows can maintain animal health and production during thermal stress and thereby minimizing the production losses and improve the profitability of the dairy farms.
Keywords: Thermal stress, organic acids, feed intake, milk yield, milk composition, dairy cow.
Abbreviation: DMI, dry matter intake; Hb, haemoglobin; PCV, packed cell volume; SNF, solid not fat; TS, total solids; THI, Temperature Humidity Index.

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