Results 21 to 30 of about 48,394 (303)
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
Comparison of lactation curve models for fortnightly test day milk yield
Indian Journal of Animal Sciences, 2020 The study of lactation curve helps to predict lactation milk production at a certain point of time and provides useful information for taking desirable decisions on preliminary sire evaluation, early culling of poor producers, breeding and feeding ...
VINEETA ARYA +5 more
doaj +1 more source
INTERPRETATION OF THE LACTATION CURVE [PDF]
Journal of General Physiology, 1926 The validity of the assumption of a substance determining the rate of milk secretion and undergoing monomolecular destruction, based on group behavior, is questioned on the evidence from a large number of individual lactation curves. It seems probable that the rate of decrease in the rate of milk secretion with advance in lactation is dependent upon ...
openaire +2 more sources
Contrasting Models for Lactation Curve Analysis
Journal of Dairy Science, 2002 Several statistical models have been proposed for the genetic evaluation of production traits in dairy cattle based on test-day records. Three main approaches have been put forward in the literature: random regression, orthogonal polynomials, and, more recently, character process models.
Jaffrezic, Florence +3 more
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Comparison of different lactation curve models to describe lactation curve in Awassi sheep raised in Turkey [PDF]
Applied Ecology and Environmental Research, 2019 The study was carried out in the International GAP Agricultural Research and Training Centre (GATEA) between the years 2010-2014 in Diyarbakır, Turkey. The aims of this study were 1) to compare 8 different models (MG, Dhanoa, Nelder, Wood, CLD, and 2nd-, 3rd-and 4th-degree polynomial) used to describe the lactation curve for Awassi sheep by using 557 ...
Tekel, Nihat +5 more
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Animal, 2009 Early lactation parameters are difficult to estimate from commercial dairy records due to the small number of records available before the peak of production.
G.E. Pollott
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Integrating fasciolosis control in the dry cow management : the effect of closantel treatment on milk production [PDF]
, 2012 The liver fluke Fasciola hepatica is a parasite of ruminants with a worldwide distribution and an apparent increasing incidence in EU member states. Effective control in dairy cattle is hampered by the lack of flukicides with a zero-withdrawal time for ...
Charlier, Johannes +5 more
core +3 more sources
Non-nutritional factors affecting lactation persistency in dairy ewes: a review
Italian Journal of Animal Science, 2010 Milk production is largely related to the shape of the lactation curve. Key elements of the lactation pattern are peak yield, which is the maximum daily yield reached during lactation, and lactation persistency, which is the medium rate of milk yield ...
Antonello Cannas +5 more
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Estimation of Genetic Parameters for Peak Yield, Yield and Persistency Traits in Murciano-Granadina Goats Using Multi-Traits Models [PDF]
, 2019 This paper studies parameters of a lactation curve such as peak yield (PY) and persistency (P), which do not conform to the usual selection criteria in the Murciano-Granadina (MG) breed, but are considered to be an alternative to benefit animal welfare ...
Barba Capote, C.J. +5 more
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CHEMICAL COMPOSITION AND SOMATIC CELL EVOLUTION DURING LACTATION IN ROMANIAN BLACK AND WHITE COWS
Scientific Papers Animal Science and Biotechnologies, 2023 The aim of the paper was to study the evolution of the chemical composition and somatic cell count during lactation in Romanian Black and White cows and effect of calving season on the shape of the lactation curve.
L. T. CZISZTER +6 more
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