Presentation (housing of cattle during heat stress).pptx

By Ahmad hassan Kamboh

1. Housing of Cattles during Heat Stress Presented by: AHMAD HASSAN Roll no. 181 Group : 4

2. What is Heat Stress? The point at which a dairy cow (or other animals) cannot dissipate an adequate quantity of heat to maintain body thermal balance or normal body temperature.

3. Signs of Heat Stress Body temperatures rises > 102.6 ◦F Panting>80 breaths per minutes Reduced activity Increased water intake Seek shade Reduced feed intake (>10-15%) Reduced milk yield (10 to 20% or more)

4. Effect on Milk Production: Decreases due to: Lower dry matter intake (feed) - Can drop 10 to > 25% Among Bos Taurus breeds, milk yield starts declining at 21  C in Holstein Friesians and in Jersey and Brown Swiss at 24  to 27  C. Milk yield of zebu declines above 32-34  C.

5. Approaches to Minimize the Effects of Heat Stress Housing and facility management Feeding management Two basic approaches -

6. Housing and Facility Adjustments Minimize overcrowding. Restrict movement. Provide shade to the animals 1. Natural 2. Artificial a. Portable b. Permanent

7. 7/9/2024

8. 15F SHED

9. Ventilation Maintain air flow rate 8-10 km/h with fans. Forced Ventilation

10. KEEP AIR MOVING

11. Shed temperature Animal Body Temperature In A well Ventilated Shed

12. Evaporative cooling: Sprinklers to wet the cow’s skin Wallowing ponds for buffaloes

13. Wallowing Pond:

14. Sprinklers Wallowing Pond

15. Any QUESTION