3.18

Heat stress in dairy cattle nutrition

Level 3 - Extension Workers, Input & Service Providers

Introduction

1. You will learn about...

2. Introduction

3. Introduction cont'd...

4. Factors that influence heat stress

5. Environmental factors

6. Environmental factors: Transporting cows

7. Cow factors: Heat produced from within the cow

8. Cow factors: Stage of lactation

9. Early signs of heat stress

10. Effects of heat stress in dairy cows

11. Effects of heat stress in dairy cows cont'd...

12. Heat stress affecting dry matter intake (DMI)

13. Heat stress affecting dry matter intake (DMI) cont'd...

14. Effects of reduced/depressed DMI

15. DMI management during heat stress

16. DMI management during heat stress cont'd...

17. How cows lose heat

18. Humidity

19. Evaporation for heat loss

20. Panting

21. Increased sweating

22. Increasing water intake

23. Increasing water intake cont'd...

24. Decreasing blood flow

25. Change in milk production and composition

26. Change in reproductive performance/fertility

27. Reduced weight and body performance

28. Preventing heat stress

29. Methods of preventing heat stress cont'd...

30. Cow barn as a prevention measure

31. Take home messages/ Summary