ASPECTOS AMBIENTAIS NA RESPOSTA FISIOLÓGICA DE VACAS GIROLANDO NA PRÉ-ORDENHA.

The objective of the experiment was to evaluate the environmental and physiological aspects of 20 Girolando cows in the waiting corral, submitted to the shaded environment and the sun, from December 2018 to February 2019. It was carried out in the dairy sector of Faculdade Dr. Francisco Maeda - FAFRAM of the Educational Foundation of Ituverava-SP, located at Sítio das Acácias. Environmental measurements (ambient temperature, relative air humidity, black globe, globe temperature index and humidity), physiological measurements (respiratory frequencies and hair temperature) were collected. Collections were made twice a week at two times (7:30 am) in the morning and at 2:00 pm in the afternoon, before each milking. The data were elaborated by analysis of variance and as means compared by the Tukey test. The variances mean values in the waiting corral without shading, respectively for ambient temperature 38.16°C, relative humidity 40.82%, black globe temperature 38.50°C, black globe temperature index and humidity 87.60, respiratory rate 44, 17 (mov., - min-1); and fur temperature 37.74°C. It is concluded that Girolando cows exposed to the sun in the pre-milk milking evaluated during the summer months, were under thermal stress. During the evaluation of animals under shading, intermediate values in the waiting pen with shade, respectively for room temperature 35.64°C, relative humidity 37.67%, black globe temperature 35.62°C, globe temperature index and humidity 83, 94, respiratory rate 42.08 (mov., - min-1); and fur temperature 34.75°C. Certifying that in the face of the analyzes, the use of a non-corral waiting hatch in pre-milking was considered little considered effective. [ABSTRACT FROM AUTHOR]