Conference proceedings article
Leiden behornte Milchkühe weniger unter leichtem bis moderatem Hitzestress als enthornte?



Publication Details
Authors:
Zipp, K.; Köhler, M.; Johns, J.; Knierim, U.
Editor:
Mühlrath, D.; Albrecht, J.; Finckh, M.; Hamm, U.; Heß, J.; Knierim, U.; Möller, D.
Publisher:
Köster
Place:
Berlin
Publication year:
2019
Pages range:
258-259
Book title:
Innovatives Denken für eine nachhaltige Land- und Ernährungswirtschaft
Title of series:
Beiträge zur 15. Wissenschaftstagung Ökologischer Landbau
ISBN:
978-3-89574-955-1

Abstract

It is suggested that horns of cattle may play a
role in thermoregulation. Therefore respiration rate, as indicator of heat
stress, of horned and dehorned European dairy cows housed indoors in the same
herd has been assessed. Groups (n=7 per group) were balanced according to days
in milk (35-354 d), milk yield (5.6-36.6 kg d-1) and coat colour.
The respiration rate was counted for each animal on five consecutive days by
one observer. The temperature humidity index (THI) in the stable was assessed every
10 min. For analysis, a mixed model was used (random factor: cow, fixed
factors: horn status, THI). THI ranged between 71.9 and 81.5 (mean=75.9). With
increasing THI, respiration rate increased significantly (Estimate=0.9, p=0.0341).
A respiration rate of 29.6-78.5 (mean=55.0) was assessed. Horn status did not
have an influence on the respiration rate (p=0.5294). Indoors, horns had no extenuating
effect during mild to moderate heat stress.


Last updated on 2019-09-09 at 13:08