Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

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V.B. Dongre, R.S. Gandhi, Avtar Singh, T.V. Raja, R.K. Singh1
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1National Dairy Research Institute, Karnal – 132 001, India.
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Cite article:- Dongre V.B., Gandhi R.S., Singh Avtar, Raja T.V., Singh1 R.K. (2023). EFFECT OF NON-GENETIC FACTORS ON WEEKLY TEST DAY MILK YIELDS AND FIRST LACTATION TRAITS IN SAHIWAL CATTLE. Indian Journal of Animal Research. 45(2): 139 - 142. doi: .
A total of 577 sahiwal Cattle maintained at National Dairy Research Institute, Karnal were analyzed to study the effect of period, season and age at first calving on first lactation traits. The least squares means for first lactation 305 day, age at first calving and first service period were 1846.55 ± 44.31 kg, 1118.441 ± 5.259 days and 170.14 ± 8.06 days, respectively.  Effect of period was highly significant (Peekly test day yields was highly significant (Pwere lowest for the heifers calving for the first time at an early age of 900 days or less for all the test day milk yields.
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