LIMOUSIN TODAY October_LimToday_WEB - Page 44

Management are the most important determinants of profit that relate to genetics. So, bull selection should be based on fertility, calving ease (direct and maternal), disease resistance and longevity, maintenance requirements and temperament. I would add adaptability; but, if cows have these traits in your environment, they are becoming adapted. Some would add milk to the list, but I contend that milk is anti-maternal. The conversion from grass to milk to pounds of calf is a terrible conversion. If you reduce the milk, you can add to carrying capacity and improve conception rates. I would use milk EPDs to put a limit on milk production as I would use hip height and mature weight EPDs to put a limit on cow size. I think there are not yet good, reliable EPDs for fertility, longevity, cow herd maintenance requirements and disease resistance. Remember, herds producing their own replacements will not be as profitable as those buying replacement cows and producing “high growth, high carcass” calves unless you sell bred cows as a major profit center. To be successful as a maternal breeder: • • Select bulls that won’t undo what you are trying to accomplish by culling. Actually, cow culling is accomplished by selecting which cows to market as bred cows. They are not bad cows—just not as good as you want yours to become. For strong maternal traits, bulls should be selected only from cows that always calve as a result of first cycle breeding. There should be evidence in closely related females that the bulls you are purchasing 42 | OCTOBER 2018 have a high probability of siring females with good udders, structural soundness and good body condition with minimal supplementation. • Expose heifers to bulls for a very short season. • Maintain a very short calving season. I like leaving bulls with the cows for a long time and selling all the late bred and/or late calving cows. Be disciplined to not keep any late-calvers. • Without excuse, market every open, dry or late-calving cow. Market bad dispositions, mothers of poor calves and those that require individual handling. • If you strictly cull for these problems every year, you will soon not have many to cull each year for reasons other than being open or dry. And the numbers of opens and dries will diminish also. You will be selling far more pregnant cows than opens. I know several herds where selling bred cows has become a significant enterprise. Well over 50% of their total livestock revenue comes from the sale of bred cows. In several of these herds, only the very best cows are kept beyond 6 years of age. They are capturing the appreciation that occurs in the younger cow years a ٽѡɭ)مՔɕѥѡЁ́Ѽ)ȁЁЁظͼѡѕ)ȁ啅ɱѕȁɽՍЁѡ)ѕѥٕ䁅х)ɽՍЁѡɭ)%Ё́ѼѡЁѽ䁥)䁅ɔ她ѼɅѡ)Ѡѕɵ)ѕɹѡͅɐ%)ͻeЁݽɬ ͔ѡم)ЁձȁA̰ԁ)͕ѥȁѽՍɽѠ)ɍ́Յ䁅͔܁)ٕݡɔ$$͕ȁ)٥ՍɔMѽ)Ʌѕ́ɔȁՍɔ)х́ɽ՝) ѥɅѕ́ɔ)$܁ѡЁЁ́Ё͍ѥͅ)Ёх$ȁɽѡ)ݡɕѼѡ͔յ́ѡ)ѡ䁅ɔ٥ѡɽ́)͍ɥѡ䁅ɔ)Ѽ́ѼЁɽх)]ȁٕ́)ݕȁѽхչ́ͽȁݕ)ɥЁͻeЁɕݽɭٕݕ)ȁѡ͔她ɕЁ̰)eЁɅѼ䁄ɕմ)ȁ̸Q͔͕ѡ)͕ٔѡɕմ)ɕ٥̸Q͔)啅ɱ́х)ЁeЁɽՍѡЁ啅ȸ)Q她ѡɕմ)ɕЁ́́)ܵЁՉѥѥɕѥ)ȁȁٕЁ̸$)QаձхЁɅѕ)ȁɅ̰ɕѥɕ)٥ɕͥЁɅȁ)I͕ٕ̰%!ɕͥ́=ɕUх) хЁЁɭѕйи)Q́ѥ݅́ɕɥѕݥѠ)ɵͥɽѡ 5饹