0.857
IF5
0.900
IF
Q3
JCR
0.92
CiteScore
0.405
SJR
Q2
SJR
20
MNiSW
165.24
ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

The use of early lactation milk protein content to predict subsequent fertility performance and likelihood of culling, in commercial dairy cows

D. Val-Arreola 1  ,  
J. D. Hanks 2,  
 
1
Michoacan University of Saint Nicolas of Hidalgo, Morelia-Zinapecuaro Road, km. 9.5 Tarímbaro, Michoacan 58880, Mexico
2
Veterinary Epidemiology and Economics Research Unit (VEERU), School of Agriculture, Policy and Development, University of Reading, P.O. Box 237, Reading RG6 6AR, United Kingdom
J. Anim. Feed Sci. 2009;18(2):209–220
Publish date: 2009-03-20
KEYWORDS
ABSTRACT
A dataset of 1,846,990 completed lactation records was created using milk recording data from 8,967 commercial dairy farms in the United Kingdom over a five year period. Herd-specific lactation curves describing levels of milk, fat and protein by lactation number and month of calving were generated for each farm. The actual yield of milk and protein proportion at the first milk recording of individual cow lactations were compared with the levels taken from the lactation curves. Logistic regression analysis showed that cows producing milk with a lower percentage of protein than average had a significantly lower probability of being in-calf at 100 days post calving and a significantly higher probability of being culled at the end of lactation. The culling rates derived from the studied database demonstrate the current high wastage rate of commercial dairy cows. Much of this wastage is due to involuntary culling as a result of reproductive failure.
CORRESPONDING AUTHOR
D. Val-Arreola   
Michoacan University of Saint Nicolas of Hidalgo, Morelia-Zinapecuaro Road, km. 9.5 Tarímbaro, Michoacan 58880, Mexico
 
CITATIONS (3):
1. Predisposing factors for involuntary culling in Holstein–Friesian dairy cows
Daniel Chiumia, Mizeck G.G. Chagunda, Alastair I. Macrae, David J. Roberts
Journal of Dairy Research
2. Factors influencing pregnancy per artificial insemination in repeat-breeder cows induced to ovulate with a CIDR-based protocol
M. Mellado, A. Zuñiga, F.G. Veliz, A. de Santiago, J.E. Garcia, J. Mellado
Animal Reproduction Science
3. Viscosity and Analytical Differences between Raw Milk and UHT Milk of Czech Cows
V. Kumbár, Š. Nedomová
Scientia Agriculturae Bohemica
ISSN:1230-1388