The effect of extended lactation on parameters of Wood’s model of lactation curve in dairy Simmental cows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722861%3A_____%2F21%3AN0000010" target="_blank" >RIV/26722861:_____/21:N0000010 - isvavai.cz</a>

Alternative codes found

RIV/62156489:43210/21:43919661

Result on the web

<a href="https://doi.org/10.5713/ajas.20.0347" target="_blank" >https://doi.org/10.5713/ajas.20.0347</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5713/ajas.20.0347" target="_blank" >10.5713/ajas.20.0347</a>

Result language

angličtina

Original language name

The effect of extended lactation on parameters of Wood’s model of lactation curve in dairy Simmental cows

Original language description

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. Methods: The database included 1,333 pure-bred dairy Simmental primiparous cows which lactated for 24 months (732 days). The initial dataset entering the procedure of assessment of parameters of Wood’s function included 35,826 milk yield records. Milk yield was recorded throughout lactation, with the earliest record taken on day 6 and the latest on day 1,348 of lactation. This dataset was used for the assessment of parameters a, b, c of Wood’s model using the non-linear statistical procedure. These parameters were estimated for different length of lactation. The assessed parameters were used for calculation of some characteristics of lactation curves. Results: The lowest value of a parameter (15.2317) of Wood’s model of lactation curve was found out in lactations up to 305 days long, contrary to b and c parameters which were highest in those lactations (0.1029 and 0.0015, respectively). The maximum value of a parameter (17.4329) was found out in lactations up to 640 days long, unlike b and c parameters which were minimal in those lactations (0.0603 and 0.0010, respectively). Conclusion: It can be concluded that the parameters of Wood’s model and the shape oflactation curve are changing with the growing number of milk yield records. Also, the assessed parameters revealed a significant milk production potential after 305 days of lactation.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40201 - Animal and dairy science; (Animal biotechnology to be 4.4)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Animal Bioscience

ISSN

2765-0189

e-ISSN

2765-0235

Volume of the periodical

34

Issue of the periodical within the volume

6

Country of publishing house

KR - KOREA, REPUBLIC OF

Number of pages

8

Pages from-to

949–956

UT code for WoS article

000645565400002

EID of the result in the Scopus database

2-s2.0-85105514815