Indian Journal of Animal Research, volume 39 issue 2 (july to december 2005) : 115 - 118

FACTORS AFFECTING HRST LACTATION MILK YIELD TRAITS IN JERSEY COWS

Y.P. Thakur!, B.P. Singh2

Affiliations

¹College of Veterinary and Animal Sciences, CSK, HP Krishi Vishvavidyalaya, Palampur - 176062, India

Submitted|
First Online |
doi

Cite article:- Thakur! Y.P., Singh2 B.P. (2025). FACTORS AFFECTING HRST LACTATION MILK YIELD TRAITS IN JERSEY COWS. Indian Journal of Animal Research. 39(2): 115 - 118. doi: .

ABSTRACT

First lactation milk production records on 1172 Jersey cows maintained from 1974 to 1995 at
4 institutional cattle breeding farms in sub-temperate mid-hill region of Himachal Pradesh were
analyzed to study to effect of various non-genetic factors viz.: farm, year and season of calving on
part and complete first lactation milk production traits. The traits included part lactation milk yield
upto 90, 150 and 305 days, first lactation milk yield, lactation length (LL) and dry period (DP). The
sire-effect was highly significant for all the traits under study. All the non-genetic effects considered in the study, significantly affected the milk production traits along with significant linear regression of traits on age at first calving. The LL and DP were Significantly influenced by the farm effect only. The quadratic regressions of all the traits studied on age at first calving were observed to be nonsignificant in the present study except DP which was highly significant.

KEYWORDS

REFERENCES

Arora. D.N. and Sharma J.S. (1983). Indian Vet. J., 60: 992-95.
Gogoi. D.N. et al. (1993). Indian J. Anim. Sci.. 63: 569-572.
Harvey. WR. (1990). Users guide for LSMLMW and MIXMDL package PC-2 version. Mimeograph, Ohio State University. Columbus, Ohio. USA.
Jain et al. (1993). Indian J. Dairy Sci., 46: 182-84.
Katoch. S. (1988). Ph. D Thesis, Agra University, Agra Ondia).
Kiwuwa. G.H.(1974). East Africa Agric. For. J., 39: ~89-297.
Murdia, CK and Tripathi, V.N. (1991). Indian Vet. J., 68: 1139-1142.
Murdia, CK and Tripathi, V.N. (1992). Indian J. Anim. Sci., 62: 177-180.
Palia, SK and Arora. c.L. (1983). Indian J. Anim. Sci., 53: 642-644.
Rege. J.E.O. et al. (1994). Animal Producion, 59: 21-29.
Sadana, DK (1984). Ph. D Thesis, Kurukshetra University. Haryana, (India).
Sadana. DK and Basu, S.B. (1981). Indian J. Dairy Sci., 34: 443-447.
Sadana. DK and Tripathi, V.N. (1986). In: Proc. 3rd World Congress on Genetics Applied to Livestock Production. July. 16-22, 1986, Lincoln, USA.
Snedecor, G.W and Cochran, WG. (1967). Statistical Methods. 6th Edition, Oxford and IBH Publishing Co., New York, USA

Disclaimer :

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

Copyright :

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

FACTORS AFFECTING HRST LACTATION MILK YIELD TRAITS IN JERSEY COWS

ABSTRACT

KEYWORDS

REFERENCES

Reviewed By

In this Article

APC

Publish With US

Become a Reviewer/Member

Open Access

Products and Services

Support and Policies

Editorial Board