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The effect of high temperature and humidity on milk yield in Ankole and crossbred cows

Niyonzima, Yvan Bienvenu and Strandberg, Erling and D’Andre Hirwa, Claire and Manzi, Maximilian and Ntawubizi, Martin and Rydhmer, Lotta (2022). The effect of high temperature and humidity on milk yield in Ankole and crossbred cows. Tropical Animal Health and Production. 54 :2 , 85
[Research article]

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Abstract

Tropical regions are characterized by high temperature and humidity across the year. At high values of temperature humidity index (THI), there is a risk of heat stress leading to lower milk yield. The objective of this study was to describe the effect of season and the effect of maximum daily THI on milk yield of that day in purebred Ankole and Ankole-Friesian, Ankole-Jersey and Ankole-Sahiwal crosses in a tropical climate. In total, 53,730 records of daily milk yield from 183 cows in Rwanda were analyzed. The results showed that THI had a negative effect on daily milk yield above a threshold, but the effect was small (-0.11 kg milk/THI unit at most). Purebred Ankole cows had the lowest daily milk yield and the lowest threshold (THI mean 66), as compared to the crossbreds (THI mean 68-69). Ankole-Friesian had a steeper decline in daily milk yield above the threshold than Ankole. The crossbreds, especially Ankole-Friesian, had higher daily milk yield than purebred Ankole also at very high THI. The results indicate some differences between breed groups in the way of coping with a hot and humid climate and raise questions about dairy cows' adaptation to such a climate.

Authors/Creators:Niyonzima, Yvan Bienvenu and Strandberg, Erling and D’Andre Hirwa, Claire and Manzi, Maximilian and Ntawubizi, Martin and Rydhmer, Lotta
Title:The effect of high temperature and humidity on milk yield in Ankole and crossbred cows
Series Name/Journal:Tropical Animal Health and Production
Year of publishing :2022
Volume:54
Number:2
Article number:85
Number of Pages:11
Publisher:SPRINGER
ISSN:0049-4747
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Keywords:Heat stress, THI, Dairy cattle, Ankole, Crossbred, Milk production
URN:NBN:urn:nbn:se:slu:epsilon-p-116102
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116102
Additional ID:
Type of IDID
DOI10.1007/s11250-022-03092-z
Web of Science (WoS)000750813700001
ID Code:27180
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: SLUpub Connector
Deposited On:23 Feb 2022 09:26
Metadata Last Modified:23 Feb 2022 09:31

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