Results 21 to 30 of about 11,907 (273)

Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle [PDF]

Journal of Central European Agriculture, 2015
The aim of this study was to identify the relationship between the lifetime performance of cows and their performance during the first 100 days of lactation.
Beata SITKOWSKA, DARIUSZ Piwczyński, Zbigniew Lach, Magdalena KOLENDA   +3 more
doaj   +1 more source

Evaluation of breeding objectives, breeding practices and reproductive performance of indigenous dairy cows in selected districts of Kaffa Zone, South West Ethiopia

Veterinary Medicine and Science, 2023
Background Breeding objectives are designed to achieve targeted dairy cow production goals, which can be affected by production type, farmer preferences, environmental factors and genetic factors individually or in combination.
Yakob Asfaw, Regasa Begna, Worku Masho
doaj   +1 more source

Relationship between Growth Pattern, Age at First Calving and Next Reproduction in Holstein Heifers

Journal of Animal Reproduction and Biotechnology, 2015
Growth rate during rearing, which varies depending on provided nutrition, has been related with age at 1st calving (AFC). This study investigated the effect of upgrowth parameters during the rearing period on the reproduction of nulliparous Holstein ...
Hyun-Joo Lim, Ho-Beak Yoon, Seok-Ki Im
doaj   +1 more source

Relationship of dairy heifer reproduction with survival to first calving, milk yield and culling risk in the first lactation [PDF]

Asian-Australasian Journal of Animal Sciences, 2020
Objective The aim of our study was to determine the associations of heifer reproductive performance with survival up to the first calving, first-lactation milk yield, and the probability of being culled within 50 days after first calving.
István Fodor, Zsolt Lang, László Ózsvári   +2 more
doaj   +1 more source

Heritability of Age at First Calving

Journal of Dairy Science, 1980
Abstract High heritabilities of age at first calving reported by a number of researchers may be due to confounding of service sires and time heifers were bred. Heritabilities from paternal half-sister analyses of variance models which included the effects of period of birth were less than from models where these were not included. Heritabilities were
F.R. Allaire, C.Y. Lin
openaire   +1 more source

Phenotypic effects of calving ease on the subsequent fertility and milk production of dam and calf in UK Holstein-Friesian heifers [PDF]

, 2011
The effect of calving ease on the fertility and production performance of both dam and calf was studied in approximately 50,000 and 10,000 UK Holstein-Friesian heifers and heifer calves, respectively. The first objective of this study was to estimate the
Coffey, M.P., Mrode, R; id_orcid, S.A.E. Eaglen, J.A. Woolliams, R. Mrode, Mrode, R., Wall, E; id_orcid, Wall, E., Woolliams, JA, Woolliams, J.A., Coffey, MP, E. Wall, Eaglen, SAE, M.P. Coffey, Eaglen, Sophie   +14 more
core   +1 more source

First-calving age and first-lactation milk production on Dutch dairy farms [PDF]

Journal of Dairy Science, 2013
Farmers attempting to reduce first-calving age (FCA) need to understand which rearing management factors influence FCA and first-lactation milk production (FLP). Reduced FCA might be associated with lower FLP. This study describes the association between herd FCA, FLP, and several herd-level health and rearing management variables and describes the ...
Mohd Nor, N., Steeneveld, W., van Werven, T., Mourits, M.C.M., Hogeveen, H.   +4 more
openaire   +3 more sources

Rearing conditions and lifetime milk revenues in Swedish dairy cows [PDF]

, 2011
Associations between replacement heifer rearing conditions and lifetime milk revenues were studied throughout the productive life of Swedish dairy cows.
Svensson, Catarina,, Mats Pehrsson, Sveriges lantbruksuniversitet., Svensson, Catarina, Jan Hultgren, Hultgren, Jan,, Hultgren, Jan, Catarina Svensson, Pehrsson, Mats   +8 more
core   +1 more source

Prevalence of, and risk factors associated with, perinatal calf mortality in pasture-based Holstein-Friesian cows [PDF]

, 2008
peer-reviewedRecent publications indicate that the prevalence of perinatal mortality has increased in some dairy industries and an increased proportion of this loss is not associated with the traditional risk factors for perinatal mortality.
Mee, John F, Cromie, A. R., J.F. Mee, D.P. Berry, A.R. Cromie, Berry, Donagh   +5 more
core   +1 more source

Genetic parameters of age at first calving, weight gain, and visual scores in Nelore heifers [PDF]

, 2017
This study aimed at estimating the heritability of age at first calving and of performance traits included in the selection index and the genetic correlations between age at first calving and these performance traits. Data were extracted from the Conexão
Ribeiro,Edson Luis de Azambuja, Claus, Luis Afonso Marques, Borges,Marcelo Henrique Favaro, Borges, Marcelo Henrique Favaro, Júlio Otávio Jardim Barcellos, Ribeiro, Edson Luis de Azambuja, Edson Luis de Azambuja Ribeiro, Koetz Junior, Celso, Roso, Vanerlei Mozaquatro, Barcellos, Julio Otavio Jardim, Vanerlei Mozaquatro Roso, Roso,Vanerlei Mozaquatro, Celso Koetz Júnior, Barcellos,Júlio Otávio Jardim, Claus,Luís Afonso Marques, Marcelo Henrique Favaro Borges, Luís Afonso Marques Claus, Koetz Júnior,Celso   +17 more
core   +2 more sources