African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Studies on the productive performance of jersey x sahiwal cows in Chittoor district of Andhra Pradesh

A. Reddy Varaprasad1*, T. Raghunandan2, M. Kishan Kumar3 and M. Gnana Prakash3
1Sri Venkateswara Veterinary University, Tirupati, India. 2Livestock Research Institute, College of Veterinary Science, Rajendranagar, Hyderabad, Andhra Pradesh, India. 3Department of Animal Genetics and Breeding, College of Veterinary Science, Rajendranagar, Hyderabad, Andhra Pradesh, India.
Email: [email protected]

  •  Accepted: 08 April 2013
  •  Published: 18 April 2013

Abstract

Season of birth and age at sexual maturity had a non-significant effect on first lactation milk yield. The overall least-squares mean lactation milk yield was 2154.07 ± 16.88 L. Significant effect of batch was found on first lactation milk yield in the present study. Cows belonging to 4th batch recorded significantly (P<0.0) higher lactation milk yield of 2475.93 ± 19.65 L.  The effects of season of birth and age at sexual maturity were found to have no-significant effect on lactation length. The overall least-squares mean value for lactation length was 300.16 ± 0.06 days.

 

Key words: Progeny Testing Programme, lactation milk yield, peak yield, age at sexual Maturity.