Posted by formenwhogrow on April 06, 2016 at 09:51:24 from (206.180.109.86):
In Reply to: Beef Production Quesu posted by Ultradog MN on April 06, 2016 at 07:56:34:
Cattle genetics play perhaps the biggest role in this situation. Some breeds are better suited for warm climates than others. There are composite breeds that have African genetics mixed in that are used with success in the southern climates. South Poll and Red Devon are two that come to mind both of which are red hided. Black hided cattle don't do as well in the heat as they are more prone to heat stress and spend more time in the shade rather than eating, both of which effect gain of course. On the flip side, cold weather is harder on larger framed cattle (simmental, charolais, maine-anjou, etc.) because the larger the animal, more feed it takes just to meet the cow's daily energy requirements, therefore taking even more feed to put on gain. As far as your bottom line goes, if feed was cheap, no it wouldn't matter; but since that's not the case, I'd have to think it is very significant. "Seventy percent of the feed a cow consumes is strictly for maintenance. Only 30% goes toward production. Bigger cows have higher maintenance requirements than smaller cows. Maintenance requirements MUST be met BEFORE any weight gain or reproduction can take place." - Kit Pharo
There are formulas out there for lbs of feed per rate of gain, I don't know them but I'm sure some of the guys who feed out cattle know them. The only thing I go by is dry matter requirements for momma cows because it's simple and it don't lie. A cow requires approximately 3% of her own body weight in dry matter on a daily basis JUST for maintenance.
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