ABSTRACKThe study aimed to evaluate the respiratory rate, heart rate and rectal temperature of mature Bali cattle, which is related to the temperature and humidity of the air within the enclosure at different roof height of the enclosure. The housing was made up of two different housing roofs, namely 200-250 cm (housing I) and housing roof height> 250-300 cm (housing II). This study used 40 mature cows of Bali cattle, at each height of different housing roof as many as 20 heads. The research method was done by direct observation and description, and using the follow-up analysis (Multiple Linear Regression), observation was done three times per day, such as morning (07.00-09.00 WIB), noon (11.30-13.30 WIB) and afternoon (16.00-18.00 WIB ). The observed variables were microclimate housing (temperature and humidity) and physiological response of mature Bali cattle (respiratory rate, heart rate and rectal temperature) at different roof height of the housing. The results showed that the height of the roof of different housing had an effect on the temperature and humidity of the air in the cage, which was related to respiratory rate, heart rate and rectal temperature of mature Bali cattle.Key words: Housing roofs, microclimate housing, physiological response, mature Bali cattle. ABSTRAKPenelitian ini untuk mengevaluasi frekuensi pernapasan, denyut jantung dan suhu rektal sapi Bali dewasa, yang berkaitan dengan mikroklimat dalam kandang (suhu dan kelembaban udara) pada tinggi atap kandang yang berbeda. Kandang terdiri dari dua tinggi atap kandang yang berbeda, yaitu 200-250 cm (Kandang I) dan tinggi atap kandang >250-300 cm (Kandang II). Penelitian dilaksanakan selama satu bulan, dari tanggal 25 April 2017 sampai 28 Juni 2017 di kandang peternak di Kec. XIV Koto, Kab. Mukomuko. Penelitian ini menggunakan ternak Sapi Bali dewasa sebanyak 40 ekor, pada masing-masing tinggi atap kandang yang berbeda sebanyak 20 ekor. Metode penelitian dengan cara pengukuran langsung dan deskripsi, pengukuran dilakukan sebanyak tiga kali, yaitu pagi, siang, dan sore. Variabel yang diamati meliputi respon fisiologis Sapi Bali dewasa dan mikroklimat pada tinggi atap kandang yang berbeda, yang dideskripsikan dan dianalisis menggunakan persamaan regresi. Tinggi atap kandang memberikan pengaruh terhadap mikroklimat dalam kandang, semakin tinggi atap kandang mempengaruhi penurunan suhu udara dan peningkatan kelembaban udara dalam kandang. Frekuensi pernapasan dan denyut jantung meningkat seiring dengan meningkatnya suhu udara dan kelembaban udara dalam kandang.Kata kunci: Tinggi atap kandang, mikroklimat kandang, respon fisiologis, sapi bali dewasa.
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