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油脂作为必需脂肪酸的来源,其能值高且有助于脂溶性维生素的吸收,在母猪营养及其饲粮中发挥重要作用.母猪妊娠后期和泌乳期饲粮中添加油脂能改善母猪繁殖性能和饲料利用效率.本文围绕母猪妊娠后期和泌乳期饲粮中添加油脂对母猪泌乳期采食量、产仔性能、泌乳性能、体重和背膘损失、乳脂含量及其能量输出量、乳中脂肪酸组成、下一个繁殖周期产仔性能、后代仔猪体组成的影响对近20年来国内外的研究进展进行综述,旨在阐述油脂对母猪的生物学作用及其机理. 相似文献
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胎儿及新生仔猪生长和健康直接受母猪营养生理状况的影响.由于妊娠期及哺乳期采食量的限饲,母猪处于分解代谢状态,旨在母猪妊娠期控制能量采食量的限饲方案容易导致胎儿及乳腺生长所需日粮蛋白的缺乏,哺乳期采食量的限饲也导致了大量母猪组织的动员,具有特殊功能的脂肪酸通过调控关键代谢途径可以提高妊娠及哺乳母猪的性能.功能性脂肪酸包括共轭亚油酸、二十二碳六烯酸(DHA)和二十碳五烯酸(EPA),它们能提高受孕率、促进胚胎形成、加速血液流动、增强抗氧化活性、促进食欲、加快蛋白合成翻译启动、促进免疫细胞的增殖并有利于小肠发育.因此日粮中添加脂肪酸对优化母猪及仔猪营养、健康和生产性能具有重要意义. 相似文献
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对于母猪群体来说,营养、饲养、基因、设施和繁殖管理等方面的合理措施是提高整体繁殖性能和利用年限的最重要手段。饲料添加剂不应只作为掩盖某一方面不足的措施,而应该作为单独手段来提高母猪繁殖性能。与应用在保育仔猪和生长猪上的传统玉米-豆粕型饲粮相比,繁殖母猪饲粮需要额外添加一些添加剂和原料才能取得最佳生产性能。本文将对L-肉碱在母猪饲粮中应用进行阐述。此外,哺乳母猪饲粮添加脂肪来提高能量浓度;妊娠母猪饲粮添加大豆皮和小麦麸来提高饲粮中纤维含量和稀释能量浓度;繁殖母猪饲粮中连续或阶段性添加抗菌剂来控制疾病已成为共识,这里也不再赘述。 相似文献
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1．母猪日粮影响仔猪生长母猪生长期日粮同母猪怀孕期日粮一样，都会对初生仔猪的成活率和断奶仔猪的生长性能产生一定的影响。因此，必须给后备母猪饲以营养均衡日粮，以保证其繁殖系统发育良好和产仔性能优异。怀孕母猪当然要饲喂优质日粮，以保证胎儿的正常生长和 相似文献
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猪的膳食纤维营养与应用概述 总被引：1，自引：0，他引：1
膳食纤维对不同生长阶段猪营养作用表现不同。日粮中添加膳食纤维有助于仔猪肠道发育并维持肠道健康和微生态平衡,减少仔猪断奶应激,缓解仔猪断奶腹泻。肥育猪日粮中添加膳食纤维,可增强后肠发酵,减少粪氮的排放量,降低环境污染,也可节约常规原料。妊娠母猪日粮中添加膳食纤维可减少限饲应激和便秘的发生,并且能改善母猪的繁殖性能,促进哺乳仔猪生长。本文主要综述了膳食纤维的定义、理化性质、分析体系及其在猪营养上的应用,以期为实际生产提供一定的指导意义。 相似文献
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When sows and their litters are kept outdoors, much of the responsibility for the litter is shifted from the herdsman to the sow compared to when the sows are kept indoors. Therefore, the maternal ability, including maternal behaviour, is believed to be important in outdoor piglet production. The aim of this study was to describe maternal traits in conventionally bred first-parity sows kept outdoors. Nursing behaviour, sow activity, sow body reserves, litter size and piglet growth were studied in 40 first-parity sows during a seven week long lactation. The sows were kept in groups outdoors. Sow activity (lying down or active) and nursing behaviour (nursing frequency, nursing duration and nursing terminator) were recorded on videotapes at four days post partum (pp) and directly observed at four and six weeks pp. Cross suckling was observed at four and six weeks pp. Sows were weighed and measured for backfat depth five days before farrowing, two weeks pp and at weaning seven weeks pp. Piglets were weighed at four days pp, at two weeks pp and at weaning. We concluded that sow nursing behaviour and activity are individual characteristics repeatable within sows' late lactation. Less active sows are more available for suckling. Light and thin sows have an earlier and more progressed weaning process than heavier, fatter sows. A significant positive relation was found between sow appetite in early lactation and piglet growth until weaning. Sow nursing behaviour is not important for piglet growth when sows and piglets are held in groups, piglets have access to sow feed and piglets are weaned as late as at seven weeks of age. 相似文献
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《Journal of Veterinary Behavior: Clinical Applications and Research》2014,9(3):107-113
Sows in modern pig industry are often housed individually in farrowing crates a few days before farrowing until weaning. These farrowing crates limit movements of the sow and therefore also limit them in expressing their behavior. These limitations may lead to distress with the sow and can result in stereotypical behaviors. Because it is possible that the general behavior of the mother sow also influences her piglets, the hypothesis of the present study was that there is an association between the general behavior of sows and the behavior of their piglets. Our results showed that there was indeed an association between the postures and activities of sows and the behavior of their piglets, not only for nursing–suckling behavior. Results also indicated that piglets prefer resting when sows are resting. When sows were standing up, piglets were running around more. Although there were indications that piglets were more at ease when sows were bar biting compared with when they were sham chewing, a specific relationship between sow stereotypical behavior and piglet behavior could not be demonstrated in the present study. Though, it should be taken in mind that relatively low frequencies of stereotypical behaviors were observed. Furthermore, it could be that not only the prevalence of a specific stereotypical behavior is important but also a specific threshold of that specific behavior should be exceeded to induce effects on the suckling piglets. Alternatively piglets could coinduce stereotypical behavior of the mother sow. 相似文献
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YU Xuexiang ZHU Xianjing SUN Qi KU Xugang LUO Rui FAN Shengxian HE Qigai 《畜牧兽医学报》1956,51(11):2778-2784
Pseudorabies (PR) is caused by the Pseudorabies virus (PRV). It is an acute and hot highly contagious disease infecting livestock and a wide range of wild animals. In order to investigate the relationship between latent infection of Pseudorabies virus and sow production performance,this study collected production parameters of first-parity sows with wild virus gE positive and negtive in a Pseudorabies positive stable intensive farm, including total litter size, healthy litter size, weak litter size, stillbirths, mummified fetus, litter weight, number of weaning live, number of weaning qualified and weaning weight. And compared the production performance of PRV gE antibody negative and positive sows in the same intensive pig farm. The study showed that each PRV gE antibody negative sow could produce 11.96 live piglets per parity. Additionally, PRV gE antibody negative sow could provide more alive, weaning and weaning qualified piglets per parity than infection sows, which were 0.63, 0.18 and 0.28, respectively. Although the average birth weight and average weaning weight of piglets produced by PRV gE antibody positive sows were higher than those produced by negative sows, the weaning qualified rate of antibody negative sows was higher than that of antibody positive sows, indicating that the weaning live piglets produced by antibody negative sows had higher uniformity. In summary, the production performance of PRV gE antibody positive sows was lower than that of the negative sows. Eradication of PR can bring higher profit to the pig farm. Pig farm should actively eradicate the PR. 相似文献
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伪狂犬病病毒野毒感染猪场的gE抗体阳性头胎母猪生产成绩调查 总被引：1，自引：1，他引：0
伪狂犬病（Pseudorabies，PR）是由伪狂犬病病毒（Pseudorabies virus，PRV）感染多种野生动物及家畜引起的急性、热性的高度接触性传染病。为掌握PRV隐性感染对头胎母猪生产成绩的影响，本研究跟踪调查某一PRV野毒阳性稳定万头母猪场中野毒gE抗体阴性和阳性的头胎母猪总产仔数、健仔数、弱仔数、死胎数、木乃伊胎数、仔猪初生窝重以及断奶活仔数、断奶合格仔数、仔猪断奶重等不同生产成绩指标，探索相同饲养条件下伪狂犬病对头胎母猪各生产指标的影响。结果发现，每头PRV野毒gE抗体阴性头胎母猪每窝平均可产11.96头活仔猪，比gE抗体阳性母猪每胎次多产活仔0.63头，以及每胎次可多提供0.18头断奶活仔，每胎次多提供0.28头断奶合格仔。虽然PRV野毒gE抗体阳性母猪所产仔猪初生均重及断奶均重均高于gE抗体阴性母猪所产仔猪，但gE抗体阴性母猪所产仔猪断奶合格率高于gE抗体阳性母猪，表明其断奶活仔整齐度更高。综上，PRV野毒gE抗体阳性的头胎母猪生产成绩低于gE抗体阴性母猪，伪狂犬病的净化可为猪场带来更高的经济效益，表明伪狂犬病的净化至关重要。 相似文献
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Prevalence of infection with porcine circovirus-2 (PCV-2) and porcine reproductive and respiratory syndrome virus (PRRSV) in an integrated swine production system experiencing postweaning multisystemic wasting syndrome 
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下载免费PDF全文 Lorenzo Fraile Maria Calsamiglia Enric Mateu Anna Espinal Anna Cuxart Chiara Seminati Marga Martín Mariano Domingo Joaquim Segalés 《Canadian journal of veterinary research》2009,73(4):308-312
The objective of this study was to evaluate the prevalence of infection with porcine circovirus-2 (PCV-2) and porcine reproductive and respiratory syndrome virus (PRRSV) through a longitudinal study in an integrated swine production system (7 farms) experiencing postweaning multisystemic wasting syndrome (PMWS). Risk factors for PCV-2 infection and for PCV-2 and PRRSV coinfection were also evaluated. Fifteen sows from each herd and 4 non-cross-fostered piglets from each sow were randomly selected at farrowing and ear-tagged at birth. Serum samples were analyzed for antibodies to PCV-2 and for detection of the PCV-2 and PRRSV genomes. Statistical analyses involved 2 approaches. The 1st approach characterized the dynamics of PCV-2 infection and their relationship with PRRSV infection. The 2nd approach analyzed the probability of being infected by PCV-2 or by both PCV-2 and PRRSV through a generalized linear mixed model incorporating sow and farm characteristics. At the 1st sampling time (1 wk of age), there was a significant relationship between sow PCV-2 infection and piglet PCV-2 infection (P < 0.0001). The risk of PCV-2 and PRRSV coinfection was 1.85 times greater in piglets from a sow with low titers of PCV-2 antibodies than in piglets from sows with medium to high titers (P = 0.03) and was 2.54, 2.40, and 2.02 times greater, respectively, in piglets from primiparous sows, PCV-2-infected sows, and farms in an area of high pig density than in piglets from sows of higher parity (P = 0.004), noninfected sows (P = 0.04), and farms in a low-density area (P = 0.09). 相似文献
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D Panjevi? M Valci? 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1989,36(2):119-122
The possible effect on pig protection after vaccination pregnant sows and their piglets against FMD at various age was examined using the SN test. Three experiments were conducted with three sow in each (8-9 piglets each). In the first experiment sows were not vaccinated but their piglets were vaccinated on 10th, 20th and 60th day of age. In second experiment sows were vaccinated at the end of rest period and in the middle of pregnancy. Pigs from one sow were vaccinated on 10th, from second sow on 20th and from the third sow on the 60th day of age. Pigs which were vaccinated on the 10th and 20th day of age were revaccinated on the 60th day of age. In third experiment sows were vaccinated at the end of the rest period and in the middle of pregnancy. Their piglets were not vaccinated. The conclusion may be drawn that if the epidemiological situation requires, systemic vaccination of all pigs then, on large farms (where pig production is planned) all sows should be vaccinated at the end of the rest period (first vaccination) and on the 55th-60th day of pregnancy. The next vaccination should be done in the middle of the next pregnancy. A vaccination program of piglets, according to our results, should depend on the vaccination program used for their dams. 相似文献
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Philipp C. Muth Le T. T. Huyen Anne Valle Zárate 《Tropical animal health and production》2017,49(6):1227-1234
In the recent past, pig performance and sow management on smallholder farms in the Southeast Asian Massif have been extensively researched. But the objective of this study was to investigate the lifetime efficiency of breeding sows of the local Vietnamese Ban (n = 89) and Mong Cai (n = 131) breeds in a production system context. The impact of sow longevity was considered in particular. In addition, predictors of early pre-weaning mortality in piglets were investigated. In total, nine villages of Son La province, situated in the uplands of north-western Vietnam, were selected, differing in access to markets, production intensity, and pig management level. Data was collected over a period of 10 years through an on-farm performance testing system. It was shown that sows of both breeds that achieved five or more parities farrowed and weaned significantly more piglets per life year compared to sows with only one or two parities. The conception rate (Spearman’s rho = 0.374) and age at first farrowing (Spearman’s rho = ?0.424) were significantly correlated with the number of weaned piglets per life year of stayable (≥4 parities) Mong Cai sows. The risk of early pre-weaning death of piglets born to Mong Cai sows was affected more by litter size, while for piglets born to Ban sows, the risk was influenced more by the season. Therefore, interventions to improve the sow lifetime efficiency and piglet survivability must match the sow breed and management level. 相似文献
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Performance measures were evaluated for 125 outdoor sows and litters of two crossbred genotypes (Camborough-15 and 25% Meishan) and in two farrowing hut designs (American-style and English-style hut). Contemporary breeding groups of second-parity sows were evaluated in an intensive, outdoor research unit. Sow genotype and hut designs were arranged factorially. Seven complete blocks were evaluated over a 21-wk period. No interactions between environment and genotype were identified for sow and litter productivity. Litters farrowing in the English-style huts weaned 1.5 more (P < .05) piglets per sow (because of a lower preweaning mortality, P = .05) than did litters in the American-style huts. The 25% Meishan weaned 1.7 more (P < .01) pigs per sow than Camborough-15, because of a greater number of piglets born alive. The effects of hut style and genotype were additive and 25% Meishan sows in English-style huts weaned an average (+/- SEM) of 11.1 +/- .83 piglets per sow. The English-style arc hut design may improve outdoor pig production and increase competitiveness of the intensive, outdoor system. The 25% Meishan genotype has potential for increased pigs weaned per litter that must be considered in light of other features of this genotype such as body composition. 相似文献