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

Factors affecting milk yield at peak and during current lactation of Holstein cows

K. O. Coelho 1,  
P. F. Machado 2,  
A. Coldebella 3,  
P. M. Meyer 4,  
L. D. Cassoli 2,  
 
1
Veterinary College, Federal University of Goias/UFG, Brazil
2
Agricultural College “Luiz de Queiroz”, University of Sao Paulo/USP, Brazil
3
Brazilian Centre of Agriculture and Animal Research/EMBRAPA - Suinos e Aves, Brazil
4
Brazilian Institute of Geography and Statistics/IBGE, Brazil
5
Veterinary Medicine and Animal Science College, University of Sao Paulo/USP, Brazil
J. Anim. Feed Sci. 2004;13(Suppl. 1):475–478
Publish date: 2004-08-30
KEYWORDS
ABSTRACT
With the objective of investigating the impact of events occurring pre and postpartum on milk yield at peak and during lactation, data were collected from 1.042 lactations of 665 Holstein cows. Body condition score (BCS), calving season (CS), dry period length (DPL), occurrence of diseases and milk yield were registered. Calving season (summer), DPL, BCS at drying off, first somatic cells count (SCC) after calving, occurrence of retained placenta and of displaced abomasum negatively affected milk yield at peak. The same events, excluding CS, and including occurrence of clinical mastitis until 60 days post-partum, negatively affected milk yield during lactation.
ISSN:1230-1388