Roberto Gomes da Silva

Thermal radiation absorbed by dairy cows in pasture

The goal of the present paper was to assess a method for estimating the thermal radiation absorbed by dairy cows (0.875 Holstein–0.125 Guzerath) on pasture. A field test was conducted with 472 crossbred dairy cows in three locations of a tropical region. The following environmental data were collected: air temperature, partial vapour pressure, wind speed, black globe temperature, ground surface temperature and solar radiation. Average total radiation absorbed by animals was calculated as

Latent heat loss of dairy cows in an equatorial semi-arid environment

{R_{abs}} = 640.0 pm 3.1, W.{m^{ - 2}}

Thermoregulatory responses of goats in hot environments.

. Absorbed short-wave radiation (solar direct, diffuse and reflected) averaged 297.9u2009±u20092.7xa0Wxa0m−2; long wave (from the sky and from terrestrial surfaces) averaged 342.1u2009±u20091.5xa0Wxa0m−2. It was suggested that a new environmental measurement, the effective radiant heat load (ERHL), could be used to assess the effective mean radiant temperature

Thermal Stress Indexes

left( {T_{text{mr}}^* } right)

Basic Physical Mechanisms

. Average