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撒坝猪繁殖性状的表型和遗传参数分析 被引量:10
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作者 连林生 鲁绍雄 《畜牧与兽医》 北大核心 2001年第2期6-8,共3页
对 6个世代共 2 31头撒坝母猪的繁殖性能数据资料进行了分析。在建立混合线性模型的基础上 ,采用HARVEY程序估计了总产仔数、活产仔数、初生窝重、 2 0日龄窝重、 60日龄断奶仔数和断奶窝重等 6个繁殖性状的表型和遗传参数。结果表明 ,... 对 6个世代共 2 31头撒坝母猪的繁殖性能数据资料进行了分析。在建立混合线性模型的基础上 ,采用HARVEY程序估计了总产仔数、活产仔数、初生窝重、 2 0日龄窝重、 60日龄断奶仔数和断奶窝重等 6个繁殖性状的表型和遗传参数。结果表明 ,撒坝猪繁殖性能在选育过程中有一定程度的提高 ,但速度平缓 ;上述 6个性状的遗传力分别为 0 0 37,0 0 75,0 1 1 1 ,0 1 55 ,0 1 0 3和 0 31 0 ,多为低遗传力性状 ;各性状间的遗传相关介于 0 532~ 0 773之间 ,表型相关和环境相关分别在 0 30 3~ 0 946和 0 442~ 0 展开更多
关键词 撒坝猪 繁殖性状 表型参 遗传参 断奶窝重 断奶仔数
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断奶前死亡的原因错综复杂
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作者 仇新泉 Donald C.LayJr 《国外畜牧学(猪与禽)》 2002年第6期32-34,共3页
由于错综复杂的原因围绕着几乎每一例断奶前死亡 ,所以断奶前死亡率多年来一直徘徊在 1 0 %上下。养猪者为减少断奶前死亡所能采取的措施 ,最重要的就是要做到母猪分娩时不离人。作者在 2 0 0 2北卡罗来那养猪会议上发表了本文。
关键词 断奶前死亡率 母猪 防止措施 断奶仔数
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胎次和产仔季节对断奶仔猪窝仔数的影响
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作者 方秉旌 《农家致富顾问》 2021年第12期213-213,共1页
本次实验分析统计了大白母猪150头的断奶仔数窝仔数。分别从胎次和产仔季节作单因素差异显著性检验,结果表明:1.不同胎次的断奶窝仔数差异极显著(p<0.01)2.不同季节中,春季的断奶仔猪窝仔数为最高,冬季、夏季、秋季的断奶仔猪窝仔数... 本次实验分析统计了大白母猪150头的断奶仔数窝仔数。分别从胎次和产仔季节作单因素差异显著性检验,结果表明:1.不同胎次的断奶窝仔数差异极显著(p<0.01)2.不同季节中,春季的断奶仔猪窝仔数为最高,冬季、夏季、秋季的断奶仔猪窝仔数差异不显著(p>0.05),但夏季的断奶窝仔数为最低。 展开更多
关键词 断奶 胎次 季节
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母猪繁殖力与养猪生产成本的关系
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作者 刘惠芳 周安国 +1 位作者 吴德 杨凤 《中国饲料》 北大核心 2004年第2期41-41,共1页
关键词 母猪 繁殖力 养猪生产成本 经济效益 断奶 年产窝
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Impact of Probiotic Supplement on the Weight Lose of Sows and Weaning Weight of Piglet
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作者 Sanita Bula Uldis Ositis Silvija Strikauska Lilija Degola 《Journal of Environmental Science and Engineering(A)》 2012年第9期1122-1129,共8页
The aim of this field study was to evaluate the influence of the probiotic BioPlus 2B on the weight loss of sows during lactation and weaning weight of litter and piglets. A total of 126 gilts/sows on commercial pig f... The aim of this field study was to evaluate the influence of the probiotic BioPlus 2B on the weight loss of sows during lactation and weaning weight of litter and piglets. A total of 126 gilts/sows on commercial pig farm were allocated to either group of 61 sows supplemented with probiotic BioPlus 2B 400 g per ton or a non-supplemented control group of 65 sows from two weeks before farrowing to weaning. Microbiological contents of feed rations were analyzed. Data were statistically processed by MS Excel program package using methods for descriptive statistics, analysis of variance and t-test. Lactating sows supplemented with probiotic BioPlus 2B increased their feed intake. It reduced sows weight loss during lactation; weight loss was 40.4-44.8 kg in controls versus 18.0-23.0 kg in supplemented sows (p 〈 0.05). Insemination of sows was done 4-5 day after weaning. Repeated insemination was needed for more sows in control group-22 sows in the control group vs. 12 sows in the supplemented group (p 〈 0.05). Reduce percent of repeated insemination from 36% to 18.5% in a commercial pig farm is a notable effect. The number of weaned piglets/litter is not significantly different between control and supplemented groups (10.54 piglets versus 10.63, p 〉 0.05). Weaned litter weight was 85.2 kg in control group and 83.4 kg in the supplemented group (p 〉 0.05). It concludes that these are sound arguments to supplement all sows on commercial farm with BioPlus 2B. 展开更多
关键词 Probiotic SOWS weight loss.
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