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Low Line Cattle
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<blockquote data-quote="beefandsleep" data-source="post: 6517924" data-attributes="member: 4148"><p>I’m sure you mean 6-650kg live weight not carcass weight.</p><p>There is a saying that you can’t breed rats from mice and it holds more than a grain of truth.</p><p>I’ve been taught that a lamb will finish at 50% of the average mature weight of its parents. So if you want a 40 kg fat lamb and have 70kg ewes then a terminal sire breed with a mature weight of 90kg is necessary. Obviously if you are happy to keep your lambs longer and grow them out before finishing larger killing weights are achievable from smaller breeds. I think a similar principle is true of cattle.</p><p>If you want a 650 kg finished beast with an acceptable level of fat at 20-24m then I don’t think that is achievable from a 500kg cow. Possibly with the bullocks if the right bull is used but not likely with the heifers and you may find calving a challenge.</p></blockquote><p></p>
[QUOTE="beefandsleep, post: 6517924, member: 4148"] I’m sure you mean 6-650kg live weight not carcass weight. There is a saying that you can’t breed rats from mice and it holds more than a grain of truth. I’ve been taught that a lamb will finish at 50% of the average mature weight of its parents. So if you want a 40 kg fat lamb and have 70kg ewes then a terminal sire breed with a mature weight of 90kg is necessary. Obviously if you are happy to keep your lambs longer and grow them out before finishing larger killing weights are achievable from smaller breeds. I think a similar principle is true of cattle. If you want a 650 kg finished beast with an acceptable level of fat at 20-24m then I don’t think that is achievable from a 500kg cow. Possibly with the bullocks if the right bull is used but not likely with the heifers and you may find calving a challenge. [/QUOTE]
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