| 澳大利亚农场绒山羊断奶体重与成熟活体重的关系 |
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| 作者： 储明星 2012-11-19 | |
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[中文题目] 澳大利亚农场绒山羊断奶体重与成熟活体重的关系 [英文单位] Livestock Prod Sci, Future Farming Syst Res Div,
Dept Primary Ind, Attwood, Vic 3049, Australia [中文单位] [出处] McGregor BA, Butler KL. Relationship of weaning weight
to the mature liveweight of cashmere does on Australian farms. Animal
production science, 2010, 50(5-6): 581-584. [ABSTRACT]
Median weaning weight and its relationship with the median mature live weight
of does was quantified for four commercial Australian cashmere farms in various
parts of Australia. Individual liveweights, of does of all ages at the time of
weaning in December, ranged from 9 to 61 kg. Individual farm means of adult
does (>1 year old) ranged from 24.6 to 38.8 kg. The model for the logarithm
of liveweight was: log(10)(liveweight) = a + br((Age + 0.6)); where a, b and r
are parameters that are different for each farm. The result that the r
parameter differs with farm was statistically significant (P = 9.4 x 10(-6)).
The percentage variance accounted for was 84.4% and the residual standard
deviation was 0.042. Farms differed greatly in the median mature liveweight
with some farms reaching similar to 44 kg and others only 31 kg. Median weaning
weight was 14.1 kg (range 11.4-16.8 kg). Median weaning weight as a percentage
of median mature doe liveweight on a particular farm varied from 32 to 42%.
These weaning weights appear low in absolute and relative terms and thus are
likely to incur production penalties. [中文摘要] 对澳大利亚不同地区商用绒山羊断奶重中位值及其与母羊成熟活重的关系进行量化。个体活重，十二月十二月份断奶的各种年龄母羊个体活重为9到61千克。各场成年（大于1岁）母羊平均值在24.6到38.8千克。活重对数模型为：log(10)(活重) = a + br((年龄 + 0.6))，其中，a，b，c为各场不同的参数。结果表明参数r场间显著不同（P = 9.4 x 10(-6)）。百分数方差占84.4%，残差标准差为0.042。成年活重中位值与部分场显著不同，达到44千克，而其他场仅为31千克。断奶重中位值为14.1千克（11.4-16.8千克）有一个羊场，断奶重中位值在成年母羊活重的32到42%间变化。这部分断奶重在绝对量和相对量项中均比较低，因此很可能产生经济损失。 相关信息: |
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