| dc.description | Con el objeto de determinar las condiciones ambientales de diez crianzas artificiales de terneros, éstas se visitaron diez veces entre abril y julio de 1988. En cada visita se midió temperatura (T°), humedad relativa (H°), velocidad del aire (VA) y cantidad de la luz (CL) dentro de las ternereras. Los campos se distribuyeron en dos grupos, de acuerdo a la hora de visita: Grupo 1 (G 1, n=5) de 8 a 11 h y Grupo 2 (G 2, n=5) de 11 a 13 h.Los rangos de T°, H°, VA y CL determinados en el interior de los galpones de G 1, fueron –2 a 14°C, 64 a 100%, 0,1 a 1,1 m/s y 8,9 a 750 lux, respectivamente. En G 2, estos rangos fueron 1 a 17°C, 80 a 99%, 0,13 a 1 m/s y 6,67 a 1.500 lux, respectivamente. La tasa de mortalidad general para el período de estudio fue de 4,4% (0–11%). Se concluye que, aunque las condiciones ambientales registradas fueron deficitarias en relación a las sugeridas en la literatura, éstos no afectaron las tasas de mortalidad de los terneros.Palabras claves: condiciones ambientales, crianza, lecherías, terneros.AbstractIn order to determine the environmental conditions of artificial rearing systems.for calves, ten dairy farms were visited ten times each between april and july of 1988. In each visit the temperature (Tº), air humidity (Hº), air speed (As) and amount of light (AL) inside the housing buildings, were measured. The farms were divided into two groups according to the time of the day they were visited; group 1 (G 1, n=5) between 8 and 11 h and group 2 (G 2, n=5) between 11 to 13 h.The range values of T°, H°, AS, and AL for G 1 tivere –2 to 14°C, 64 to 100%, 0.1 to 1.1. m/s and 8.9 to 750 lux, respectively. In G 2these ranges were 1 to l7'C, 80 to 99%, 0.13 to 1.0 m/s, and 6.67 to 1,500 lux, respectively. The general rate of calf mortality for the period of this study was 4.4% (O to 11%). It was concluded that although the environmental conditions do not meet those suggested by the international literature, these do not affected the yate of calf mortalitv.Key words: environmental conditions, housing, dairy farms, calves. | es-ES |
