Effect of evaporative cooling and altitude on dairy cows milk efficiency in lowlands

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F20%3AN0000015" target="_blank" >RIV/00027014:_____/20:N0000015 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12220/19:43899764

Result on the web

<a href="https://vuzv.cz/_privat/20013.pdf" target="_blank" >https://vuzv.cz/_privat/20013.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00484-019-01828-5" target="_blank" >10.1007/s00484-019-01828-5</a>

Result language

angličtina

Original language name

Effect of evaporative cooling and altitude on dairy cows milk efficiency in lowlands

Original language description

The objective of this current work was to determinate the effect of high temperatures on milk production of dairy cows in southern Slovakia in the year 2015. The hypotheses that milk production is influenced by the altitude and cooling were tested. Production data included 227,500 test-day records belonging to 34 Holstein breed herds situated in lowlands, 115 to 150 m above sea level (ASL) and kept in free-stall housing. Dairy farms were classified into groups based on cooling system. The first group of cows (19 herds) was cooled evaporative (foggers) and forced ventilation, and the second group (15 herds) was using cooled only forced ventilation (automatically controlled fans in housing and feeding areas). During the period from May to September, 36 summer and 22 tropical days were recorded, 37 days had a mean thermal humidity index value above 72.0, and on 34 days we recorded mean values above 78.0. The highest milk yields were recorded at the altitude 1 (115 m ASL) (9219.0 kg year−1; 10327.0 kg year−1) and the lowest at the altitude 2 (126 m ASL) (7598.7 kg year−1; 8470.21 kg year−1) (P < 0.001). Dairy cows cooled evaporative milked significantly more milk than cows cooled only with forced air flow (9650.4 kg vs. 8528.0 kg; P <0.001). Fat and protein production differed also significantly (364.0 kg vs. 329.5 kg, P < 0.001; 312.2 kg vs. 279.7 kg, P < 0.001). It can be concluded that not only heat stress but also location farm above sea level can affect milk production. Evaporative cooling associated with increased air velocity is the appropriate protection against high temperatures.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/QK1910438" target="_blank" >QK1910438: Reduction the use of antibiotics by environmentally-friendly prebiotic and probiotic feed additives in the nutrition of calves</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

International Journal of Biometeorology

ISSN

0020-7128

e-ISSN

—

Volume of the periodical

64

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

433-444

UT code for WoS article

000498005200001

EID of the result in the Scopus database

2-s2.0-85075376386