Effect of drinking earthen pot water on physiological response and behavior of sheep under heat stress.

Abstract

Heat stress is a major limiting factor for animal welfare and sheep production. Traditionally in India, the villagers used to keep their drinking water in the earthen pot to make it cold during summer. The cold drinking water (24-28°C) during summer gives a feeling of relief from the heat. Therefore, the present study was carried out to assess the effect of drinking earthen pot water on physiological response and behavior of sheep under heat stress for one month. For this purpose, eighteen Avishaan rams were selected from the experimental animal flock and they were equally divided into three groups; viz., control (CON), heat stress (HS) and heat stress with earthen pot water (HSC). The animals of HS and HSC were exposed to higher ambient temperatures to induce heat stress inside the psychometric chamber. The animals of CON and HS were provided with ad-libitum water of their ambient temperature whereas; HSC groups were provided with ad-libitum cold water (24-28°C) earthen pot water. All the animals were offered with 400gm concentrate mixture and ad-libitum Cenchrus hay. The bodyweight of HS rams was significantly reduced (P<0.05) at the end of the experimental period as compared to their initial body weight. The total roughage and dry matter intake was significantly higher (P<0.01) in HSC rams as compared to HS rams. The plasma thyroxine concentration was significantly lower (P<0.05) in HSC as compared with HS group. The rumination time significantly reduced (P<0.05) in HSC group. However, The blood biochemical did not differ among the groups. Therefore, it may be concluded that Avishaan rams have the ability to adapt to heat stress. Nevertheless, the availability of earthen pot cold drinking water under heat stress reduced their body weight loss, improves their metabolic activity and ultimately improves their welfare.