8.3

Prevention of heat stress in cow barns

Level 3 - Extension Workers, Input & Service Providers

Introduction

1. You will learn about...

2. Introduction

3. Causes of heat stress in the cow barn

4. Heat stress in high yielding cows

5. Major climatic (thermal) factors

6. Major climatic (thermal) factors Cont'd...

7. Understanding heat exchange in the environment

8. Heat exchange in the environment vs cow's body

9. Climate in Uganda

10. Temperature humidity index (THI)

11. Temperature humidity index (THI) tables

12. Planning animal housing in different THI zones in Uganda

13. Examples of tropical, zones in Uganda

14. Planning animal housing in tropical area in Uganda

15. Example of a temperate area in Uganda

16. Planning animal housing in temperate areas in Uganda

17. Example of arid area in Uganda

18. Planning animal housing in arid areas

19. Temperature humidity index (THI) tolerance levels

20. How animal housing aids in thermoregulation

21. How to reduce heat stress in animal housing

22. Provision of shade or shelter

23. Heat prevention through shading by a shelter

24. Heat prevention through shading by a shelter Cont'd...

25. Shade from the natural environment

26. Shelter from raised structures (cow barn)

27. Site location

28. Dimensions of the cow barn

29. Materials for cow barn

30. Improving housing efficiency

31. Methods of improving housing efficiency: Wall or no wall?

32. Methods of improving housing efficiency: Roofing design

33. Aiding ventilation through cow barn design

34. Design of ventilation system

35. Spacing recommendations

36. Number of animals (stocking rate)

37. Drinking water as a coolant

38. Drinking water as a coolant Cont'd...

39. Cooling by wetting a cow's body

40. Fans (high-speed air) for body cooling

41. Use of water and fans to cool a cow's body

42. Summary (Take home messages)