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 +7 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 +2 more sources
Non-linear modelling to describe lactation curve in Gir crossbred cows [PDF]
Journal of Animal Science and Technology, 2017 Background The modelling of lactation curve provides guidelines in formulating farm managerial practices in dairy cows. The aim of the present study was to determine the suitable non-linear model which most accurately fitted to lactation curves of five ...
Yogesh C. Bangar, Med Ram Verma
doaj +2 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
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 +4 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
Association between age at first calving and lactation performance, lactation curve, calving interval, calf birth weight, and dystocia in Holstein dairy cows. [PDF]
PLoS ONE, 2021 In the present study, records on 115,291 heifers distributed in 113 herds were used to investigate the association between age at the first calving (AFC) and lactation performance, lactation curve, the length of the first calving interval (CI), calf ...
Hadi Atashi, Anise Asaadi, Miel Hostens
doaj +2 more sources
Effects of season and age at first calving on genetic and phenotypic characteristics of lactation curve parameters in Holstein cows [PDF]
Journal of Animal Science and Technology, 2016 In this research data representing 72,946 primiparous cows from 724 herds with 638,063 total test day records calved between 2001 and 2011. These data were analysed to determine the effect of age at first and season of calving on parameters of the Wood ...
Mahdi Elahi Torshizi
doaj +2 more sources
LACTATION PERFORMANCE AND LACTATION CURVE TRAITS IN GRAZING KATAHDIN SHEEP
Chilean Journal of Agricultural & Animal SciencesThe aim of this study was to assess lactation traits, lactation curve shape and curve parameters in Katahdin sheep under a grazing-based feeding system. A total of 27 second-parity Katahdin ewes were evaluated. The animals were kept on a pasture composed
María de Lourdes Alonso Herrera +7 more
doaj +2 more sources
Phenotypic and genomic modeling of lactation curves: A longitudinal perspective*
JDS CommunicationsLactation curves, which describe the production pattern of milk-related traits over time, provide insightful information about individual cow health, resilience, and milk production efficiency. Key functional traits can be derived through lactation curve
Hinayah Rojas de Oliveira +5 more
doaj +3 more sources