The effect of artificial or natural shade on respiration rate, behaviour and performance of grazing steers

Autor:	J I Velazco, P. Rovira
Rok vydání:	2010
Předmět:	Wet-bulb globe temperature Soil Science Plant Science Biology Latitude Environmental temperature Agronomy Air temperature Grazing Respiration Animal Science and Zoology Relative humidity Respiration rate Agronomy and Crop Science
Zdroj:	New Zealand Journal of Agricultural Research. 53:347-353
ISSN:	1175-8775 0028-8233
Popis:	A study was carried out in Uruguay (latitude 33° 14′S, longitude 54° 15′W) to assess the impact of shade on climatic conditions and on grazing cattle during summer. Three treatments (no shade, artificial shade provided by cloth and natural shade provided by trees) were assigned to 30 steers. The provision of shade significantly reduced the black globe temperature but did not affect either air temperature or relative humidity. Respiration rate (RR)±standard deviation averaged 74±22, 67±18 and 61±12 breaths per minute in no shade, artificial and natural shade treatments, respectively (P 0.05). The amount of time the steers spent in shade was strongly related to air temperature with a threshold around 25°C. Provision of artificial or natural shade was successful as a method of reducing RR of grazing steers without affecting grazing time or animal performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fad1b38fe953719579e0cdf4d09f9569 https://doi.org/10.1080/00288233.2010.525785 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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