Influence of barn climate, body postures and milk yield on the respiration rate of dairy cows

Pinto, Severino and Hoffmann, Gundula and Ammon, Christian and Amon, Barbara and Heuwieser, Wolfgang and Halachmi, Ilan and Banhazi, Thomas and Amon, Thomas (2019) Influence of barn climate, body postures and milk yield on the respiration rate of dairy cows. Annals of Animal Science, 19 (2). pp. 469-481.

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Abstract

The main objective of this study was to identify the influences of different climatic conditions and cow-related factors on the respiration rate (RR) of lactating dairy cows. Measurements were performed on 84 lactating Holstein Friesian dairy cows (first to eighth lactation) in Brandenburg, Germany. The RR was measured hourly or twice a day with up to three randomly chosen measurement days per week between 0700 h and 1500 h (GMT + 0100 h) by counting right thoracoabdominal movements of the cows. Simultaneously with RR measurements, cow body postures (standing vs. lying) were documented. Cows’ milk yield and days in milk were recorded daily. The ambient temperature and relative humidity of the barn were recorded every 5 min to calculate the current temperature-humidity index (THI). The data were analyzed for interactions between THI and cow-related factors (body postures and daily milk yield) on RR using a repeated measurement linear mixed model. There was a significant effect of the interaction between current THI category and body postures on RR. The RRs of cows in lying posture in the THI < 68, 68 ≤ THI < 72 and
72 ≤ THI < 80 categories (37, 46 and 53 breaths per minute (bpm), respectively) were greater than those of standing cows in the same THI categories (30, 38 and 45 bpm, respectively). For each additional kilogram of milk produced daily, an increase of 0.23±0.19 bpm in RR was observed. Including cow-related factors may help to prevent uncertainties of RR in heat stress predictions.
In practical application, these factors should be included when predicting RR to evaluate heat stress on dairy farms


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made available in accordance with a Creative Commons Attribution Non-Commercial No Derivatives License 4.0.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 15 Oct 2019 01:29
Last Modified: 21 Nov 2019 05:59
Uncontrolled Keywords: dairy cow, heat stress, temperature-humidity index, cow-related factors, naturally ventilated barn
Fields of Research : 07 Agricultural and Veterinary Sciences > 0702 Animal Production > 070203 Animal Management
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
Identification Number or DOI: 10.2478/aoas-2019-0006
URI: http://eprints.usq.edu.au/id/eprint/36769

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