Relationship between temperature, temperature-humidity index and amount of  food intake of Sheep

Bui Van  Loi; Nguyen Xuan  Ba; Le Duc  Ngoan; Nguyen Quang  Linh

doi:10.18006/2022.10(1).135.143

Authors

Bui Van Loi Hue University, 03 Le Loi St., Hue City, Vietnam, 49000 https://orcid.org/0000-0002-4493-2702
Nguyen Xuan Ba University of Agriculture and Forestry, Hue University, Vietnam, 53000
Le Duc Ngoan University of Agriculture and Forestry, Hue University, Vietnam, 53000
Nguyen Quang Linh Hue University, 03 Le Loi St., Hue City, Vietnam, 49000 https://orcid.org/0000-0002-8424-1148

DOI:

https://doi.org/10.18006/2022.10(1).135.143

Keywords:

Temperature-humidity index, Sheep, Hot season, Cold season, Food intake

Abstract

This study aimed to identify the relationship between temperature, temperature-humidity index (THI), and the amount of dry matter food intake (DMI) by sheep. Twelve Phan Rang (Ninh Thuan province) sheep belonging to three age groups of 6, 9, and 12 months (4 heads of each age group) raised in Thua Thien Hue province were fed with natural grass for two seasons: hot season (April-August) and cold season (November-February). Daily temperature, humidity, and food intake were recorded. The results of the study revealed that temperature and THI were closely correlated (P<0.05) with the amount of food intake by sheep. When the temperature was in the range of 29.5°C to 32.5°C and increased by 1^οC, the DMI of sheep decreased by 14.7 g/BW/day. When the value of THI was more than 28.5 and rose by 1°C, the DMI of sheep decreased by 16.2 g/BW/day.

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