The effect of milk yield on conversion coefficients between lactations of Czech Fleckvieh cows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F14%3A00228939" target="_blank" >RIV/62156489:43210/14:00228939 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

čeština

Original language name

The effect of milk yield on conversion coefficients between lactations of Czech Fleckvieh cows

Original language description

The number of lactations of dairy cows has a high influence on milk production,especially in first three lactations. The observation was carried out in the group of 8144 cows with 75-100% proportion of Czech Fleckvieh cattle in genotype. All cows finished the first three lactations. The total mean milk yield was 6154.45 kg in the first lactation, 7208.32 kg in the second lactation and 7506.72 kg in the third lactation. The coefficient for calculation of the milk yield for 1st, 2nd and 3rd lactation were1.17; 1.22 and 1.04 respectively. For detailed evaluation of the influence of the estimation coefficients between first three lactations the herd was divided into five groups according to the milk yield in the first lactation (up to 4000 kg, 4001-5000 kg, 5001-6000 kg, 6001-7000 kg and over 7000 kg). For each group the estimation coefficients were calculated. The estimation coefficients between lactations decreased with increasing yield in the first lactation. It was in all cases statis

Czech name

The effect of milk yield on conversion coefficients between lactations of Czech Fleckvieh cows

Czech description

The number of lactations of dairy cows has a high influence on milk production,especially in first three lactations. The observation was carried out in the group of 8144 cows with 75-100% proportion of Czech Fleckvieh cattle in genotype. All cows finished the first three lactations. The total mean milk yield was 6154.45 kg in the first lactation, 7208.32 kg in the second lactation and 7506.72 kg in the third lactation. The coefficient for calculation of the milk yield for 1st, 2nd and 3rd lactation were1.17; 1.22 and 1.04 respectively. For detailed evaluation of the influence of the estimation coefficients between first three lactations the herd was divided into five groups according to the milk yield in the first lactation (up to 4000 kg, 4001-5000 kg, 5001-6000 kg, 6001-7000 kg and over 7000 kg). For each group the estimation coefficients were calculated. The estimation coefficients between lactations decreased with increasing yield in the first lactation. It was in all cases statis

Type

D - Article in proceedings

CEP classification

GG - Zootechnics

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2014

Confidentiality

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

Article name in the collection

MendelNet 2014 - Proceedings of International PhD Students Conference

ISBN

978-80-7509-174-1

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

134-137

Publisher name

Mendel University in Brno

Place of publication

Brno, Czech Republic

Event location

Brno, Czech Republic

Event date

Nov 19, 2014

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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