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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/62156489:43210/21:43919661

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Animal Bioscience

ISSN

2765-0189

e-ISSN

2765-0235

Svazek periodika

34

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

KR - Korejská republika

Počet stran výsledku

8

Strana od-do

949–956

Kód UT WoS článku

000645565400002

EID výsledku v databázi Scopus

2-s2.0-85105514815