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本研究将80头妊娠后期母猪按胎次配对的原则(胎次分布2～6胎)分为两组,每组40头,每头为1个重复。对照组饲喂基础日粮,试验组在基础日粮中添加0.5%酵母培养物,试验从妊娠85d开始至断奶后再发情结束,为期65d。结果表明,试验组与对照组比较,哺乳期采食量(4.13kg/d·头VS.4.22kg/d·头)无显著差异(P0.05),母猪产程缩短了8.2%(P0.05),断奶后10d内发情的比例提高了24%。试验组和对照组窝产仔数分别为11.70头、10.92头(P0.05),仔猪初生重为1.82kg、1.69kg(P0.01),仔猪断奶重为6.98kg、6.68kg(P0.05),窝断奶仔猪数为8.53头、8.35头(P0.05)。说明酵母培养物对母猪的生产性能具有一定的改善作用,以仔猪初生重较为明显。 相似文献
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《养猪》2016,(2)
为研究智能饲养技术对母猪哺乳期生产性能的影响,选用72头待产托佩克A*B系二元母猪,随机分为试验组和对照组,每组36头,试验组母猪分3批,每批12头饲养于安装智能化饲喂装置的产床,对照组饲养于常规产房。测定母猪繁殖表现、仔猪断奶表现和采食量。结果表明,窝产弱仔率,智能化组比对照组显著降低4.4个百分点(P0.05);智能化组断奶仔猪个体重比对照组显著提高11.29%(P0.05)。从采食量来看,产前智能化组母猪日均投料量比对照组显著减少38.56%(P0.05)。仔猪教槽料窝均投料量、头均投料量分别节省36.00%(P0.05)、37.50%(P0.05)。哺乳母猪智能化饲养技术能显著减少母猪窝产弱仔率、产前投料量和仔猪教槽料采食量,提高断奶仔猪断奶重。 相似文献
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为了研究蜂胶对母猪生产性能的影响,选择16头配种时间、胎次基本一致的长大妊娠母猪为材料,随机分成对照组和试验组。对照组只饲喂基础日粮,试验组则在基础日粮中添加蜂胶。试验从母猪妊娠81d进产房开始,到仔猪21日龄断奶后7d结束。研究结果表明,与对照组相比,试验组仔猪断奶重平均提高0.62kg,差异极显著(P<0.01);成活率提高4.51%,差异显著(P<0.05);在哺乳和断奶前7d,试验组仔猪腹泻率分别比对照组低1.37%(P<0.05)、2.96%(P<0.01)。因此,蜂胶对提高母猪生产性能有较大促进作用。 相似文献
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试验旨在研究母源性博落回提取物(macleaya cordata extract, MCE)对宫内发育迟缓(intrauterine growth retardation,IUGR)断奶仔猪生长性能、血清抗氧化和免疫功能的影响。选择60头初产母猪(长白×约克),按照体重相近的原则随机分为3个处理组,每个处理20个重复,每个重复1头母猪。对照组饲喂基础饲粮,2个试验组分别在基础饲粮中添加500 mg/kg和1 000 mg/kg MCE。母猪试验期46 d(妊娠90 d至泌乳21 d断奶)。每个处理母猪所产IUGR断奶仔猪随机选取16头21日龄(4.1±0.09) kg的仔猪进行饲养,分为4个重复,每个重复4头IUGR断奶仔猪,试验期28 d(22—49日龄)。结果表明,与对照组相比,母猪饲粮添加1 000 mg/kg MCE可以显著提高其后代IUGR断奶仔猪日增重和日采食量(P<0.05)。母源性MCE显著提高IUGR断奶仔猪血清超氧化物歧化酶、谷胱甘肽过氧化物酶活性(P<0.05),降低丙二醛含量(P<0.05);显著增加血清白细胞介素-10水平(P<0.05... 相似文献
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选择预产期接近、饲养条件相似的母猪50头,随机分为试验组(30头)和对照组(20头)。试验组母猪临产前14d注射利特佳(仔猪C型产气荚膜梭菌大肠埃希氏菌二价灭活苗,美国辉瑞产品)2mL/头;产前产后各7d按每吨饲料添加80%支原净(上海诺华产品)125g和30%金霉素3kg;从临产前5d开始,每天用拜洁带猪消毒;产前1h用安多福消毒液清洗母猪乳房及外阴,产后保证每头仔猪吃足初乳;从仔猪补料到断奶后7d的饲料中添加1%快育灵(喹乙醇)10kg/t;发现腹泻仔猪立即口服氟哌酸粉剂。对照组常规管理。结果表明,试验组仔猪30窝315头,红、黄、白痢和水肿病发病头数和死亡… 相似文献
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研究采用单因子试验设计,以丹系妊娠后期二元母猪为研究对象,探讨了在母猪饲粮中补充钾盐对母猪繁殖性能的影响。试验选取1~6胎、健康状况良好且预产期接近的妊娠后期母猪40头,按随机区组法分为两组。对照组20头,饲喂常规怀孕母猪料及哺乳母猪料;试验组20头,在常规怀孕母猪料和哺乳母猪料中补充索巴伦诗(硫酸钾镁盐)5 kg/t。试验期为51 d,记录母猪采食量、产仔情况数据及断奶生产数据。结果显示,与对照组相比,试验组母猪窝均产活仔数提高0.42%,仔猪断奶前窝均死亡数降低72.93%,窝均断奶仔猪数提高12.25%,断奶窝重提高14.45%,母猪头均日采食量提高2.00%,母猪断奶后下一情期受胎率提高4.76个百分点。这表明,在母猪饲粮中补充钾盐能够大幅提高母猪的繁殖性能。 相似文献
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试验主要研究在母猪妊娠后期(妊娠91 d至分娩)限制饲喂对母猪生产性能的影响。试验方法:试验选择健康、与配公猪品种一致、预产期接近的长×大母猪约1 050头/批次,2016年10月至2017年7月配种批次作为对照组,2017年10月至2018年7月配种批次为试验组,妊娠前、中期饲喂标准一致:配种至妊娠30 d饲喂2.8 kg/(头·d);妊娠31~90 d饲喂2.2 kg/(头·d)。妊娠91 d至分娩,对照组饲喂3.8 kg/(头·d),试验组饲喂3.3 kg/(头·d)。试验结果:与对照组相比,产死胎率显著降低1.62个百分点(P<0.05);断奶前仔猪死亡率显著降低2.81个百分点(P<0.05);窝均断奶数显著提高0.54头(P<0.05);21日龄断奶个体重显著提高0.34 kg(P<0.05)。试验结论:降低妊娠母猪后期采食量有助于降低死胎率、减少断奶前死亡数、提高窝均断奶数、提高21日龄断奶重,提高经济效益,具有一定的推广应用价值。 相似文献
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《养猪》2021,(3)
试验旨在研究围产优对母猪繁殖性能与免疫功能的影响。选择预产期、体重、膘情、胎次相近的长大二元杂种母猪40头,采用随机区组试验设计分成2组,每组20个重复,每个重复1头母猪。对照组饲喂常规母猪料;试验组于产前20d至断奶当天在常规母猪料中添加"围产优"0.5kg/t,在断奶后至发情配种前母猪料中添加"围产优"1kg/t。试验猪高床单栏饲养,全漏缝地板,分餐饲喂,自由饮水,用不锈钢料槽采食饲料。免疫、驱虫、消毒、饲喂时间及饲养管理按猪场常规方案执行,仔猪23日龄断奶。结果表明,与对照组相比,试验组窝均产仔数、窝均产活仔数均有提高趋势,但差异不显著;与对照组相比,试验组平均初生个体重、断奶仔猪数、平均断奶个体重、断奶成活率和平均日增重显著提高;平均产程极显著缩短,母猪产后子宫炎-乳腺炎-无乳综合征(MMA)发生率极显著降低;断奶后7 d内发情率极显著提高;母猪乳汁和血清以及仔猪血清中的IgA、IgG和IgM水平显著或极显著提高。综上所述,"围产优"能显著提高母猪繁殖性能与免疫功能。 相似文献
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Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引：1，自引：0，他引：1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
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嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.…… 相似文献
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Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
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Observations on the Pathology of the Spleen of the Cat 总被引：1，自引：0，他引：1
Abstract— Lesions were found in the spleen of four of sixty-three cats examined post mortem in the department, and comprised two examples of lymphosarcoma, one of chronic fibrinous peritonitis and one of subcapsular haematoma. Abnormalities were found in two cat spleens received from veterinary surgeons in general practice. In one cat the abnormalities were an haemangiosarcoma with secondary deposits in the liver and in the other extensive mast cell infiltration. In addition lesions were detected in the spleen of three of eighty-seven cats examined post mortem in general practice. The lesions were: multiple secondary deposits of adenocarcinoma from a primary tumour of the mammary gland, a ruptured spleen and a foreign body below the splenic capsule. Résumé— L'examen microscopique de soixante-trois chats pratiqué dans le service a permis de rencontrer quatre fois des lésions de la rate, dont deux lymphosarcomes, une péritonite capsulaire fibrineuse et un hématome sous-capsulaire. D'autre part des lésions ont été trouvées dans deux rates de chat expédiées par des vétérinaires exerçant en pratiaue générale. Chez un chat il s'agissait d'un htmangiosarcome avec métastases hépatiques et chex l'autre d'une infilt ation diffuse par des mastocyta. De plus, on a rencontré des llésions dnas la rate de trois chats parmi quatre-vingt sept autopsies effectuées dans le cadre d'une clientèle génárale. Ces iésions étaient dés métastases multiples d'un adénocarcinome dont la tumeur primitive siègeait dam la glande mammaire, une rupture de la rate et un corps érangers sou capsulaire. Zusammenfassung— Läsionen der Milz wurden bei vier von dreiuiidsechzig in dieser hbteilung sezierten Katzen gefunden, und zwar in zwei Fällen ein Lymphosarkom, in einem Falle eine chron-ische fibrinöse Peritonitis und in einem ein subkapsuläres Hématom. Anomalien fanden sich auch in der Milz von zwei Katzen, die aus der tierxrztlichen Praxis eingesandt wurden. Bei der einen Katze war dies ein Hämangiosarkom mit Metastasen in der Leber, bei der anderen eine weitläufige Infiltration der Mastzellen. Außerdem wurden bei drei von siebenundachtzig in der Praxis sezierten Katzen Milzläsionen gefunden. Diese bestanden am multiplen Metastasen eines Adenokarzinoms der Brustdrüse, einer Milzzerreissung und einem Fremdkörper unterhalb der Milzkapsel. 相似文献