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Breeding / Calving Issues
Calving Season?
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<blockquote data-quote="SRBeef" data-source="post: 989979" data-attributes="member: 7509"><p>I heard a researcher somewhere promote the "best" time to calve is 30 days before spring greenup. Greenup in SW WI being around May 1 that would put ideal calving at April 1. I use that for a start of calving date. Using the AHA gestation chart that puts bull-in day at June 23rd.</p><p></p><p>The logic is that this is probably after most severe winter weather and also the lactating cow's peak nutrition demands (30 to 90 days after calving) then coincide with peak grass (May and June).</p><p></p><p>I was trying to calve in mid March but that is risky weather wise in WI. April 1 start is a lot safer. Emphasis though also needs to be on a tight calving period with most calves born on the first cycle = by about April 23rd? and just a few born on the second cycle. I want to be done calving no later than 45 days after the first calf is born. Any cows not calving within 45 days after the first calf will get sold at some time either as a pair or more likely right after weaning. Weaning is the first week in Nov when the average calf age is right about 205 days. </p><p></p><p>Not saying its the best system but it works for me. Bulls stay in with cows from June 23 until around Dec 1 when they go to their own pasture from Dec 1 to bull in on June 23 the following year. Having bulls in with cows that long makes them easier to handle and doesn't extend calving since the cows should be all bred already. rotational grazing is much easier with each bull in with his breeding group. fwiw</p><p></p><p>jim</p></blockquote><p></p>
[QUOTE="SRBeef, post: 989979, member: 7509"] I heard a researcher somewhere promote the "best" time to calve is 30 days before spring greenup. Greenup in SW WI being around May 1 that would put ideal calving at April 1. I use that for a start of calving date. Using the AHA gestation chart that puts bull-in day at June 23rd. The logic is that this is probably after most severe winter weather and also the lactating cow's peak nutrition demands (30 to 90 days after calving) then coincide with peak grass (May and June). I was trying to calve in mid March but that is risky weather wise in WI. April 1 start is a lot safer. Emphasis though also needs to be on a tight calving period with most calves born on the first cycle = by about April 23rd? and just a few born on the second cycle. I want to be done calving no later than 45 days after the first calf is born. Any cows not calving within 45 days after the first calf will get sold at some time either as a pair or more likely right after weaning. Weaning is the first week in Nov when the average calf age is right about 205 days. Not saying its the best system but it works for me. Bulls stay in with cows from June 23 until around Dec 1 when they go to their own pasture from Dec 1 to bull in on June 23 the following year. Having bulls in with cows that long makes them easier to handle and doesn't extend calving since the cows should be all bred already. rotational grazing is much easier with each bull in with his breeding group. fwiw jim [/QUOTE]
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