Biological Cycle of the Beef Cow

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Biological Cycle of the Beef Cow

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3. Biological Cycle of the Beef Cow The biological cycle of the cow has implication on reproduction, nutrition, and genetics Therefore the biological cycle has everything to do with the economic forces of beef production To optimize production efficiency we must understand the requirements of the cow throughout the cycle nutritional requirements of the beef cow fluctuate from very low (lower than any other livestock) to moderately high

4. Gestation length is approximately 282 days 1st trimester = 94 days 2nd trimester = 94 days 3rd trimester = 94 days *** 365 days/yr - 282 = 83 days to get her rebred

5. Biological Cycle of the Beef Cow

6. Annual energy requirement and hay intake: 1200 lb cow, 20 lb milk at peak

7. Annual protein requirement and hay intake: 1200 lb cow, 20 lb milk at peak

8. Goal of Managing the Biological Cycle of the Beef Cow Plan the calving season so that the time of greatest animal need will coincide with time of greatest nutrient supply. Two factors: Range readiness Biological cycle of the beef cow

22. Approximate Feed Inputs kg/cow/year

23. Conclusions Time of calving and age at weaning affected weaning weights of calves Must consider all goals in choosing calving and weaning times Feed costs must be weighed against calf prices and herd size to determine optimum calving time

24. Matching forage and cow’s requirement, Deseret Land and Livestock, From 1995 Intermountain Cow Symposium Reduce dependency on harvested forages - lower annual feed cost Harvest hay on only productive land ? lowered $/ton of hay Decreased annual labor cost of feeding cows

25. Hay production changes at the ranch

26. Selected costs per cow per year

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