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规模化猪场母猪淘汰原因与对策 总被引：2，自引：2，他引：0
对河南省某规模化猪场的母猪淘汰率及淘汰原因进行调查,并提出了降低母猪淘汰率的相应措施。研究发现,该猪场的母猪年淘汰率为40%;淘汰的原因是高胎龄(38.77%)、肢蹄病(15.37%)、死亡(9.69%)、久不发情(8.51%)、屡配不孕(7.33%)、子宫炎(6.62%)、久治不愈(5.44%)及其他原因(8.27%)。 相似文献
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福建某公司母猪淘汰原因分析及防治措施 总被引：1，自引：0，他引：1
母猪是猪场生产的"机器",对该"机器"的正常保养和正确使用是猪场正常生产运转、生产效益最大化的前提和保障。正常商品猪场母猪的淘汰率在20%~30%,然而在遇到母猪不发情、子宫炎、屡配不孕等繁殖障碍疾病时会加大母猪淘汰率,现笔者就福建某公司2012年度母猪淘汰原因进行分析,并提 相似文献
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《畜牧兽医科技信息》2017,(8)
<正>合理及时的补充后备母猪是一个猪场保持持续高效生产力的前提和基础。后备母猪的饲养管理直接关系到猪场的生产效益。为保持基础种猪群优秀的生产成绩,后备母猪的更新换代与饲养管理尤为重要。1后备母猪的淘汰与更新标准商品猪场母猪年淘汰更新率33%~40%,新建猪场1~2年更新率为15%~20%,繁殖猪场年淘汰率40%,原种猪场更新率75%。后备母猪使用前淘汰率应为10%,后备公猪的引入 相似文献
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《养猪》2018,(6)
以某规模化猪场2017年生产数据为例,分析了母猪淘汰原因。生产母猪年淘汰率为39.73%(708/1 782),其中非正常淘汰占80.08%(567/708),明显高于正常淘汰率19.92%,非正常淘汰为生产母猪群淘汰的主要因素。进一步分析导致母猪非正常淘汰的原因发现,繁殖障碍性疾病和肢蹄疾病分别占57.8%(328/567)、11.46%(65/567),为主要原因。在繁殖障碍性疾病之中又以久不发情(19.05%,108/567)、屡配不孕(13.23%,75/567)两大因素为主。不同季节之间母猪淘汰率以秋季31.50%(223/708)最高。母猪平均淘汰胎次为3.8胎,2胎母猪淘汰率最高为31.50%(223/708),1胎次之为12.60%(89/708)。 相似文献
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<正>母猪是猪群快速发展的基础,只有在生产中搞好母猪的饲养管理工作,才能保证它们高产繁育,发挥出最高的生产效率,创造出最佳的经济效益。1母猪饲养管理存在的问题1.1母猪淘汰率高为提升猪场产能,通常情况下猪场会每年淘汰一部分母猪,比如有疾病的母猪、产仔数偏低的母猪,一般淘汰率为30%左右。但从现实情况来看,部分猪场的淘汰率达到了50%以上,可见性能差的母猪数量过大。究其原因,主要是因为母猪不发情、跛脚等原因, 相似文献
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贺清林 《青海畜牧兽医杂志》2002,32(5):52-52
通常母猪断奶后 ,一般情况下 4～ 10ｄ发情。若母猪断奶后推迟发情 (经产母猪在仔猪断奶后 2 0～ 3 0ｄ未出现发情症状 )或不发情就称母猪乏情。母猪产后乏情是集约化养猪场普遍存在的繁殖障碍问题 ,是造成优良种猪淘汰的主要原因 ,对猪场的经济效益影响很大。王祖昆等认为 ,目前集约化养猪场中母猪年淘汰率约为 3 0 % ,其中 15 %以上是由于母猪长期不发情而被迫淘汰。而我场母猪断奶后不发情造成淘汰的淘汰率为 2 4.5 % 〔1〕。为此笔者现对本场母猪断奶后不发情的原因进行综合分析。1 母猪断奶后推迟发情或不发情的原因分析1.1 母猪哺乳… 相似文献
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<正>猪场内生产母猪的淘汰率是衡量猪场生产水平和猪群健康状况的重要指标,它体现了一个猪场的经营管理理念和饲养管理水平。本文旨在通过对某猪场淘汰母猪调查分析,提出确实可行的降低猪场生产母猪淘汰率的方法。猪场要想实现高生产水平,必须拥有合理适当的母猪年龄和胎次结构~([1])。实际生产中淘汰是 相似文献
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母猪产后子宫炎是影响母猪繁殖力的主要因素之一。据７０头产后母猪统计,产后１０天内有炎症表现的母猪高达５７．１％但大部分母猪在断奶前可以有自愈,部分母猪因此而影响产后发情和配种,并导致高达１２．９％的淘汰率,此现象在纯种母猪中特别严重。本试验比较了三种子宫冲洗药,认为在子宫炎多发病季节,对全部分娩母猪用子宫净冲洗是预防子宫炎的一种有效方法。 相似文献
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为了研究仔猪猪瘟病毒(CSFV)母源抗体的衰减规律,本研究随机选择36头待产母猪,产后采血,选择每头母猪对应的仔猪连续采血至8周龄,分离血清,通过ELISA方法检测CSFV抗体阻断率,所测结果利用EXCEL拟合指数曲线,计算分析母猪CSFV抗体水平与仔猪母源抗体衰减规律。结果显示,36头母猪中母猪抗体阻断率80%以上6头,母猪抗体阻断率70%~79%的11头,母猪抗体阻断率60%~69%的8头,母猪抗体阻断率50%~59%的5头,母猪抗体阻断率49%以下的6头。3周龄仔猪抗体阻断率整体与母猪抗体阻断率相近且高度相关,相关系数为99%。母猪抗体阻断率在80%以上时,母源抗体对所产仔猪8周龄时仍然具有保护力;母猪抗体阻断率在70%~79%时,母源抗体对所产仔猪7周龄时不再具有保护力;母猪抗体阻断率在60%~69%时,母源抗体对所产仔猪5周龄时不再具有保护力;母猪抗体阻断率在50%~59%时,母源抗体对所产仔猪4周龄时不再具有保护力;母猪抗体阻断率49%以下时,母源抗体对所产仔猪3周龄时不再具有保护力。以上结果表明仔猪母源CSFV抗体随着仔猪周龄的增加逐渐衰减,由试验得出仔猪猪瘟疫苗首免日龄的计算公式:y=1.19x-46.55(x为母猪CSFV抗体阻断率,y为首免日龄)。因此,母猪抗体阻断率在80%以上时,仔猪母源抗体在60日龄不再具有保护力,仔猪猪瘟疫苗首免为56日龄;母猪抗体阻断率在70%~79%时,母源抗体对仔猪的保护持续到50日龄,仔猪猪瘟疫苗首免为42日龄;母猪抗体阻断率在60%~69%时和50%~59%时,母源抗体对仔猪的保护持续至36日龄和29日龄,仔猪猪瘟疫苗首免分别为28日龄和21日龄。本研究中所得母猪CSFV抗体水平计算母源抗体衰减变化,为选择母猪首免日龄,提高仔猪猪瘟疫苗免疫效果提供了科学依据。 相似文献
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The pregnancy rate and the subsequent litter size were studied in 332 Swedish Yorkshire primiparous sows, fed according to a commercial Swedish feeding regime during lactation. The sows were weighed and backfat depth was recorded at the first farrowing, at weaning, and at mating. Oestrous detection was performed once daily after weaning, and the interval from weaning to first oestrus (IWO) was recorded. Blood samples for determination of plasma progesterone were drawn regularly after the first weaning. Statistical analyses were only performed on sows with an IWO of 3-8 days. Of these 206 sows were mated on their first (OE1 sows) and 87 sows on their second (87 OE2 sows) oestrus after weaning.The pregnancy rate was 85.4% for OE1 sows and 75.9% for OE2 sows (p=0.048). There was no significant difference in pregnancy rate between OE1 sows with an IWO of 3-5 days and OE1 sows with an interval of 6-8 days. OE2 sows with an IWO of 6-8 days, on the other hand, had a significantly lower pregnancy rate compared with OE2 sows with an interval of 3-5 days. The pregnancy rate in sows that lost more than 30 kg during the first lactation period did not differ from that of sows losing less than 30 kg. In sows with a first litter size of more than 9 piglets alive at birth, the pregnancy rate decreases significantly if mating is delayed until the second oestrus after weaning.OE2 sows had a significantly larger second litter size at birth than OE1 sows (+ 2.0). The litter size at six weeks did not, on the other hand, differ significantly (+ 0.4). There was a positive correlation between the IWO and 2nd litter size, although significant only for OE1 sows between the IWO and litter size alive at birth. In the OE1 group, sows losing 20 kg or less during lactation had significantly larger second litters at birth than the sows losing 21-30 kg, but not significantly larger than the sows losing more than 30 kg. One piglet more, at birth, in the first litter resulted in 0.25 piglet more in the second litter. For sows with a large first litter there was a low probability of also having a large second litter. 相似文献
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为了减少人工授精过程中人为操作引入的病原微生物,改善母猪断奶后不发情、延迟发情或发情后配种不受孕所导致的母猪繁殖性能降低的现象,在饲养管理良好、免疫程序健全的条件下,试验采用在母猪配种前对其进行药物处理。将试验母猪随机分为2组,A组为断奶经产母猪(n=65),B组为第2情期后的后备母猪(n=58)。将A组进一步分为A-Ⅰ组(n=36,投药组)和A-Ⅱ组(n=29,空白对照组),B组进一步分为B-Ⅰ组(n=34,投药组)和B-Ⅱ组(n=24,空白对照组)。统计发情率、受胎率、分娩率及产仔数等繁殖指标。结果表明:A-Ⅰ组每头母猪断奶10 d内发情率为100%,与A-Ⅱ组发情率(96.55%)相比差异不显著(P>0.05);A-Ⅰ组情期受胎率为91.67%,分娩率为86.11%,产仔数为11.32头,而A-Ⅱ组情期受胎率为85.71%,分娩率为78.57%,产仔数为9.95头,差异均显著(P<0.05);B组内,除健仔数外其余各指标差异均不显著(P>0.05)。说明在配种前给经产母猪投药,可以改善母猪繁殖力。 相似文献
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为了解广西中小规模养猪户面临的问题,以问卷形式对广西贵港、北海、玉林、柳州、南宁等地19个乡镇148个农户进行调查。结果显示20头母猪以上大户占75%,投入在5万元以上,从业多年,养猪是主要收入来源,户主多为中学文化水平,用工3～10人;5～20头母猪中户占17%,母猪在5头以下的小户占8%。大户对乳猪料认识好,用得多,占32%,但有50%的大户对价格比较敏感。农户饲养土杂猪的比例占60%,饲养快大猪占35%,纯土猪只有5%。大户的种猪多来自种猪场占25%,而小农户多数自己留种或在村里购买,占60%;对选种多数看外表占66%,15%的人会关注生产记录。普遍使用大猪场的精液,占80%。调查表明将中小规模养猪户并入产业链,统一规范管理,平衡合作农户的计酬,形成一站式服务是中小规模养猪户的发展趋势。 相似文献
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The pregnancy rates at 20 and 50 days were tested by sampling 91 hybridization sows more than 16 days using the intuitive, fast, accurate and non-invasive portable veterinary B ultrasound instrument in the pig breeding farm had 300 sows. The results showed that the nonpregnant diagnostic accuracy rate was 100% at 18 to 20 days, and the pregnant diagnostic accuracy rate was 100% at 40 to 50 days. According the diagnostic results, the pregnancy, disease, estrus, nonpregnancy and non-estrused sows were took the appropriate measures such as nursing, treatment, supplementary breeding and sensuality, the non-productive days of the individuals and groups of sows were improved by above measures. The study built a intuitive, fast, accurate sows early pregnancy diagnosis technology, which improved the fertility of the individuals and groups of sows increased the economic benefit of pig farm. 相似文献
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CD Castagna CH Peixoto FP Bortolozzo I Wentz F Ruschel GB Neto 《Reproduction in domestic animals》2003,38(5):373-376
In order to increase reproductive performance, sows are usually inseminated several times during oestrus. In practice, this results in a significant number of sows receiving one or more post‐ovulatory inseminations. This study was carried out to determine the percentage of sows that receive one or more post‐ovulatory inseminations and the effect of such treatment on reproductive performance. The results were analysed from a total of 1298 sows on two farms. It was observed that more than 70% of the sows received at least one post‐ovulatory insemination and approximately 20% received two or more. There was no observed effect on the rate of return to oestrus, farrowing rate or litter size (p > 0.05). 相似文献