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The objective of this research was to evaluate rectal and skin temperature of dairy heifers on feeding time. Six dairy heifers were randomly allocated to 1 of 6 treatments: P1 (feeding time 5 am/6 pm), P2 (feeding time 8 am/4 pm) and R1 (TDN 70%), R2 (TDN 75%), R3 (TDN 75% supplemented with 3,5% coconut oil). Thus, 6 treatments were P1R1 (A), P1R2 (B), P1R3 (C), P2R1 (D), P2R2 (E), P2R3 (F), in each of periods of 14 d each in a 6 x 6 Latin Square Design. The environmental conditions (air temperature, relative humidity, temperature humidity index, radiation, and wind velocity) and animal responses (rectal temperature and skin temperature). The environmental conditions were measured daily at 1 h intervals from 5 am to 8 pm. The animals responses were measured at the 4 th , 8 th , 12 th , 14 th , day of each periode at 1 h intervals from 5 am to 8 pm. Tukey , s test and contrast orthogonal analyses were used. The results showed that rectal and skin temperature were significantly lower on cattle which fed at 5 am and 6 pm than that of 8 am and 4 pm. The conclusion was heat stress of dairy heifer could be reduced by managing feeding time and feeding with easily digestible nutrient.

Efek Waktu Pemberian Pakan dan Level Energi terhadap Cekaman Panas Berdasarkan Suhu Rektal dan Kulit Sapi Dara Fries Holland