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The mathematical description of lactation curves in dairy cattle [PDF]
Italian Journal of Animal Science, 2011 This review gives an overview of the mathematical modelling of lactation curves in dairy cattle. Over the last ninety years, the development of this field of study has followed the main requirements of the dairy cattle industry.
Giuseppe Pulina +4 more
doaj +8 more sources
Lactation curve and persistency of Anatolian buffaloes
Italian Journal of Animal Science, 2015 The aim of this study was to determine the lactation curve traits of Anatolian buffaloes raised under different conditions in farms in Tokat Province, Turkey.
Aziz Şahin +4 more
doaj +6 more sources
Journal of Dairy Science, 2022 : We fit the Wood's lactation model to an extensive database of test-day milk production records of US Holstein cows to obtain lactation-specific parameter estimates and investigated the effects of temporal, spatial, and management factors on lactation ...
M. Li +3 more
doaj +3 more sources
Modifying the Lactation Curve to Improve Lactation Milk and Persistency [PDF]
Journal of Dairy Science, 2003 Daily, stage and lactation estimated breeding values (EBV) and the shape of the lactation curve for each cow are controlled by a unique set of random (genetic) regression coefficients under a test day model, thus providing a basis for genetic improvement of these characteristics. Three selection procedures were developed for simultaneous improvement of
K Togashi
exaly +3 more sources
Fit of different linear models to the lactation curve of Italian water buffalo [PDF]
Italian Journal of Animal Science, 2005 Mathematical modelling of lactation curve by suitable functions of time, widely used in the dairy cattle industry, can represent also for buffaloes a fundamental tool for management and breeding decision, where average curves are considered, and for ...
Corrado Dimauro, N P P Macciotta
exaly +3 more sources
The effect of extended lactation on parameters of Wood’s model of lactation curve in dairy Simmental cows [PDF]
Animal Bioscience, 2021 Objective This study was focused on the estimation of parameters of Wood’s model and description of the lactation curve using the cows which were lactated over 24 months on the first lactation.
Tomáš Kopec +5 more
doaj +1 more source
Investigating lactation curve characteristics of dairy cows
Науковий вісник Львівського національного університету ветеринарної медицини та біотехнологій імені С.З. Гжицького. Серія: Сільськогосподарські науки, 2023 The main goal of this study was to analysis of the main characteristics (latent variables) of lactation curve in dairy cows using multivariate Principal Component Analysis.
O. S. Kramarenko
doaj +1 more source
Comparison of Mathematical Models Applied to F1 Dairy Sheep Lactations in Organic Farm and Environmental Factors Affecting Lactation Curve Parameter [PDF]
Asian-Australasian Journal of Animal Sciences, 2013 The objective of this study was to compare the goodness of fit of four lactation curve models: Wood’s Gamma model (WD), Wilmink (WL), and Pollott’s multiplicative two (POL2) and three parameters (POL3) and to determine the environmental factors affecting
J. C. Angeles-Hernandez +4 more
doaj +1 more source
World, 2022 The ability of smallholder dairy farming systems (SHDFS) to achieve desirable lactation-curve characteristics is constrained or reduced by environmental stresses.
Dismas Said Shija +4 more
doaj +1 more source
Lactation curve modelling using Legendre Polynomial in Sahiwal cattle
Indian Journal of Animal Sciences, 2016 Present study aimed at modelling lactation curve in Sahiwal cattle using normalized Legendre polynomials functions of standardized units of time and understanding the variation of lactation curve in different lactations. Among the first three lactations,
VED PRAKASH +3 more
doaj +1 more source