Diferentes densidades de Gliricidia sepium e condições de ambiência para ovinos

Abstract

The present work was evaluated as ambience alterations in silvipastoral systems of septic Gliricidia in three different shading systems. The experiment was carried out in the Forragicultura sector of UFRB, Cruz das Almas - BA campus, between September and November 2016. The physiological responses of the animals were respiratory rate, heart rate, pelt temperature and rectal temperature of 12 sheep divided into 3 groups with 4 sheep compared to three systems: without shading; shaded with density 400/1 trees / ha; and shading with density 800/1 trees / ha. The environmental variables: black globe temperature; dry bulb temperature; wet bulb temperature; relative humidity; wind speed; room temperature; intensity of luminosity; and active photosynthetic radiation were collected parallel to the physiological responses for four consecutive days with seven collections during the day, starting at 6 a.m. and finishing at 6 p.m. with time intervals of two hours. With the physiological responses and environmental variables, the thermal comfort indexes were calculated for thermal comfort index for sheep, temperature and humidity index and temperature index of the globe and humidity, in order to evaluate the ambience in the three systems, and during the months of the experiment. The design was the Latin square with factorial arrangement 3x3x7 The thermal comfort indexes and the physiological responses were higher in November, on the other hand, September was the less stressfull month, during the entire period of the experiment the animals stayed in a stress level varying from intermediary to high. Among the systems without shading was the worst for the maintenance of thermoregulation, shading with gliricidia interfered in the environment, providing welfare to the sheep, but there was no difference (p <0.05) between the densities. The TCI makes possible to predict the respiratory frequency of the sheep.