Abstract
Background: The current study had been conducted to understand the impact of breed as well as season and stage of lactation on various milk constituents viz. freezing point, SNF, pH, lactose, protein, fat and electric conductivity of Sahiwal and Kankrej cows maintained at LRS”Livestock Research Station”, College of Veterinary and Animal Science, RAJUVAS, Bikaner, Rajasthan. Methods: Milk samples from 45 each Sahiwal and Kankrej cows were collected and analyzed for milk composition parameters. Data have been classified as per breed along with season and stage of lactation. Result: The analysis of variance for breed demonstrated highly significant impacts of fat and SNF whereas non-significant effect was found on pH, freezing point, lactose and protein.The analysis of variance demonstrated highly significant (P less than 0.01) impact of season on fat, SNF, freezing point and significant effect on protein whereas non-significant effect on lactose, pH and Electric conductivity in Kankrej cattle however highly significant (P less than 0.01) effect was found on fat in Sahiwal cattle.The analysis of variance presented significant (P less than 0.05) effect of lactation stage on fat and Protein in Sahiwal cattle whereas on fat and SNF in Kankrej cattle.
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