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Utilização de um índice de conforto térmico em zoneamento bioclimático da ovinocultura

1995; INSTITUTO DE ZOOTECNIA IZ/APTA-SAA/SP; Volume: 52; Issue: 1 Linguagem: Inglês

1981-4100

Orlando Rus Barbosa, Roberto da Silva Gomes, José Scolar, José Maurício Franco Guedes,

Effects of Environmental Stressors on Livestock

The thermal comfort index was utilized in bioclimatic zoning for sheep raising in the states of Sao Paulo and Parana. Isolines of Ta, U, wand insolation (η) were drawn using 10 year averages (from 1983 to 1992). The Thermal Comfort Index (ICT) isolines were obtained multiplying the set of meteorological averages that characterized each place, in every month of the year,by the chosen index, e i , thus obtaining the Y 1 value which summarizes all environmental elements and characterizing the environment. The months of January, May, JuIy and October were selected for representing better the seasons of the year, based on the values of relative humidity (U), and thermal comfort index ICT values were computed for 33 locations in Sao Paulo and 32 ones in Parana, and with these values it s drawn isolines for the four seasons. West and Northwest regions of Sao Paulo (including the cities of Presidente Prudente. Aracatuba and Sao Jose do Rio Preto) and the Northwest part of Parana (including the cities of Nova Esperanca, Paranavai and Nova Londrina) were considered the best for the Polwarth breed, because of their characteristics of high temperature and low humidity. From the seashore to 200 km inland (limited by the cities of Itapeva, Tatui, Campinas and Caconde, in Sao Paulo; and by Castro, Telemaco Borba, Laranjeiras do Sul, Pato Branco, in Parana), it is possible to maintain Suffolk and Corriedale sheep. The central parts of both states (cities of Botucatu, Piracicaba, Casa Branca, Ribeirao Preto, Jaboticabal, Barretos, Catanduva, Marilia and Assis, in Sao Paulo; Palotina, Umuarama, Maringa, Londrina, Cambara, Jaguariaiva, Pitanga and Francisco Beltrao, in Parana) are good for Corriedale sheep, but in some extent also for Suffolk sheep raised for meat. This breed could also be managed in regions suitable for Ideal, since confinement conditions are observed.