Correlations between milk yield in primiparous PHF cows and selected lifetime performance and fertility indicators as well as reasons for culling
E Janus, D Borkowska - Acta Scientiarum Polonorum. Zootechnica, 2012 - agro.icm.edu.pl
The aim of this study was to assess the correlation between milk yield in primiparous cows
and their subsequent productivity, length of productive life, and reasons for culling. The …
and their subsequent productivity, length of productive life, and reasons for culling. The …
Relationships between milking performance of cows in the first lactation and their longevity
J Pytlewski, I Antkowiak… - Nauka Przyroda …, 2010 - npt.up-poznan.net
The aim of the study was to investigate the dependencies between milking performance of
cows at first lactation and their lifespan and lifetime yield. Investigations were conducted in a …
cows at first lactation and their lifespan and lifetime yield. Investigations were conducted in a …
Cow longevity in herds of different milk production levels and herd size
A Sawa, M Bogucki, P Niewiadomski - Annals of Warsaw University …, 2016 - agro.icm.edu.pl
Cow longevity in herds of different milk production levels and herd size. The effect of herd
production level and herd size on cow longevity was studied using the SYMLEK system data …
production level and herd size on cow longevity was studied using the SYMLEK system data …
[PDF][PDF] Analiza pokroju i wybranych cech funkcjonalnych krów rasy polskiej holsztyńskofryzyjskiej odmiany czarno-białej należących do różnych rodzin
Celem pracy była analiza cech pokrojowych 288 krów rasy holsztyńsko-fryzyjskiej odmiany
czarno-białej z uwzględnieniem przynależności do grupy krewnych (30 rodzin), średniej …
czarno-białej z uwzględnieniem przynależności do grupy krewnych (30 rodzin), średniej …
[PDF][PDF] The use of lactation persistence as an indicator in the selection of the maternal lines of hf cows
P Wójcik, M Cwynar, M Pankowski - 2022 - oa.zut.edu.pl
The research material for this study consisted of a group of 163 Polish Holstein Friesian
cows (PHF). For the study, the cows were assigned to 14 maternal lineages covering three …
cows (PHF). For the study, the cows were assigned to 14 maternal lineages covering three …
[PDF][PDF] Karol Węglarzy, Irena SkrzyŜala, Julia Stekla
COWH BREEDING - Citeseer
Cow heifers milk yield in first 100 days of lactation influence on cows ability to calving and
breeding indexes analysis was the main goal of the investigation. The research were carried …
breeding indexes analysis was the main goal of the investigation. The research were carried …
Ancestry analysis of cows of record milk yields and its constituents
Z Sobek, J Różańska-Zawieja… - Acta Scientiarum …, 2017 - asp.zut.edu.pl
The aim of the research was the pedigree analysis of top yielding cows. The investigation
concerned the effects of male ancestors on the productivity of their female progeny. The total …
concerned the effects of male ancestors on the productivity of their female progeny. The total …