Modelling the lactation curve of dairy cows using the differentials of growth functions [PDF]
, 2008 Descriptions of entire lactations were investigated using six mathematical equations. comprising the differentials of four growth functions (logistic. Gompertz, Schumacher and Morgan) and two other equations (Wood and Dijkstra).
Bannink, A. +5 more
core +3 more sources
The use of mid-infrared spectrometry to predict body energy status of Holstein cows [PDF]
, 2011 Energy balance, especially in early lactation, is known to be associated with subsequent health and fertility in dairy cows. However, its inclusion in routine management decisions or breeding programs is hindered by the lack of quick, easy, and ...
Banos +23 more
core +3 more sources
An empirical analysis of the cost of rearing dairy heifers from birth to first calving and the time taken to repay these costs [PDF]
, 2017 Rearing quality dairy heifers is essential to maintain herds by replacing culled cows. Information on the key factors influencing the cost of rearing under different management systems is, however, limited and many farmers are unaware of their true costs.
A.C. Boulton +24 more
core +2 more sources
Sow body condition at weaning and reproduction performance in organic piglet production [PDF]
, 2009 The objective was to investigate the variation in backfat at weaning and its relations to reproduction results in organic sow herds in Denmark. The study included eight herds and 573 sows.
A. G. Kongsted +15 more
core +1 more source
Body Condition Score and Milk Production on Conception Rate of Cows under a Small-Scale Dairy System
Animals, 2019 Management and production characteristics impact conception rate to first service (CR1S) in small-scale dairy farms, but the impact of body condition score (BCS) and milk production levels on cows’ fertility is unknown.
Luis Javier Montiel-Olguín +6 more
doaj +1 more source
Veterinary research forum : an international quarterly journal, 2013 The aim of the present study was to compare the occurrence and duration of clinical mastitis in different seasons, stages of lactation period and parities in a Holstein dairy farm in Iran. A retrospective epidemiological survey from April 2005 to March 2008 was conducted on 884 clinical mastitis cases of 7437 lactations.
Maede Moosavi +3 more
openaire +3 more sources
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2011 The aim of this study was to determine effect of lactation stage and number, current milk performance and ambient temperature on laterality of dairy cows laying behaviour (i.e. preference of either left or right body side).
Petra Zejdová +3 more
doaj +1 more source
Red blood cell counts in sows during lactation [PDF]
Veterinarski Glasnik, 2010 In the course of parturition and lactation, sows are susceptible to stress and make an effort to adapt to the newly-formed situation through different endocrine and metabolic mechanisms.
Joksimović-Todorović Mirjana +2 more
doaj +1 more source
Influence of housing conditions, number of farrowing and number of pigs in litter on weight loss in sows during lactation [PDF]
Veterinarski Glasnik, 2013 The objective of this work was to investigate the influence of housing conditions, number of farrowing and number of pigs in litter on weight loss in sows during lactation.
Sladojević Ž. +3 more
doaj +1 more source
CANADIAN DAIRY COW DISPOSALS: I. DIFFERENCES BETWEEN BREEDS, LACTATION NUMBERS AND SEASONS [PDF]
Canadian Journal of Animal Science, 1971 Primary reasons for disposal of 26,651 dairy cows of the Ayrshire, Guernsey, Holstein and Jersey breeds were collected in Canadian Record of Performance herds from September, 1967 to August, 1968. Reproduction and low milk production were major causes of voluntary herd removals. The percentages culled annually for these problems ranged from 13.4 to 24.
E. B. BURNSIDE +3 more
openaire +1 more source