Associations between strain, herd size, age at first calving, culling reason and lifetime performance characteristics in Holstein-Friesian cows
PBN-AR
Instytucja
Wydział Hodowli i Biologii Zwierząt (Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Animal (40pkt w roku publikacji)
ISSN
1751-7311
EISSN
1751-732X
Wydawca
DOI
URL
Rok publikacji
2017
Numer zeszytu
2
Strony od-do
327-334
Numer tomu
11
Identyfikator DOI
Liczba arkuszy
0.5
Autorzy
Słowa kluczowe
en
Holstein-Friesian strains
cow use intensity
culling reason
lifetime milk production
longevity
Streszczenia
Język
en
Treść
Cow longevity and lifetime performance traits are good indicators of breeding effectiveness and animal welfare. They are also interrelated with the economics of dairy herd. Unfortunately, a high milk yield is often associated with deteriorated cow health and fertility and, consequently, with an increased culling rate. This situation, observed also in the Polish population of Holstein-Friesian cattle, inspired us to undertake a study on the associations between some factors and lifetime performance characteristics. The data set consisted of the records on 135 496 cows, including 131 526 of the Black and White strain (BW), and 3970 of the Red and White strain (RW) covered by performance recording and culled in 2012. It was found that cows of the BW strain and those from the largest herds (>100 cows) reached higher lifetime and mean daily energy-corrected milk (ECM) yields than cows of the RW strain and those from smaller herds culled at a similar age. Cows youngest at first calving (<2.0 years) were characterised by the highest lifetime ECM yield. It indicates that heifers can be bred even when they are younger than 15 to 16 months with no significant negative effect on their later performance. Infertility and reproduction problems (39.6%) and udder diseases (15.5%) constituted the most frequent reasons for cow culling. Cow longevity and lifetime productivity were considerably affected by the interactions between the studied factors.
Inne
System-identifier
UR454708f800b04905a0aaacc6288c6733
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