Effect of age at first calving on longevity and fertility traits for Holstein cattle

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F13%3A%230001784" target="_blank" >RIV/00027014:_____/13:#0001784 - isvavai.cz</a>

Result on the web

<a href="http://www.agriculturejournals.cz/publicFiles/84947.pdf" target="_blank" >http://www.agriculturejournals.cz/publicFiles/84947.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Effect of age at first calving on longevity and fertility traits for Holstein cattle

Original language description

Effects of age at first calving (AFC) on functional longevity of Czech Holstein cows and their reproduction traits in the first lactation were analyzed using the first lactation data of 605 538 Holstein cows first calved from 1993 to 2008. Three classeswere formed for AFC: low age class (16-24 months), average age class (25-30 months), and high age class (33-46 months). Effects of AFC on length of productive life (LPL), days open (DO), days between calving and first service (CTFS), and days between first service and conception in the first lactation (FSTC) were estimated by survival and linear model analyses. It was found that LPL was on average slightly shorter for cows with higher AFC who showed also a lower proportion of higher lactations and tended to longer DO and longer CTFS in the first parity. The results of survival analysis indicate that cows with higher AFC had a tendency to shorter LPL (risk of culling 1.118) and to longer DO (risk of conception 0.758), CTFS (risk of conce

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GI - Farm animal breeding and farm animal pedigree breeding

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Czech Journal of Animal Science

ISSN

1212-1819

e-ISSN

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Volume of the periodical

58

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

11

Pages from-to

47-57

UT code for WoS article

000315627200001

EID of the result in the Scopus database

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