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1.
选择无角道塞特、萨福克、特克塞尔、夏洛莱等4个不同品种的良种肉羊种公羊共40只．按常规方法采集精液,并对精液品质进行分析比较。结果表明4个不同品种种公羊的射精量、精子密度、鲜精活率、畸形率、顶体完整率都有差异。但是射精量、鲜精活率、畸形率3个指标之间的差异不显著（P〉0．05）,而密度与顶体完整率两个指标间的差异显著（P〈0．05）。4个品种中萨福克种公羊的精子密度最高,其次为特克塞尔和夏洛莱种公羊,最低的为无角道塞特种公羊。其中萨福克种公羊的精子密度显著高于特克塞尔、夏洛莱和无角道塞特种公羊（P〈0．05）。4个品种中无角道塞特种公羊的精子顶体完整率最高,其次为特克塞尔和萨福克种公羊,最低的为夏洛莱种公羊。其中无角道塞特种公羊的精子顶体完整率显著高于夏洛莱种公羊（P〈0．05）。 相似文献
2.
将15只年龄2．60士0．25岁、体重43．48士1．46kg的辽宁绒山羊种公羊随机分为三组,试验一组和试验二组分别饲喂10g／d和15g／d的复方中草药添加剂,对照组不添加,目的是研究中草药添加剂对种公羊精液品质的影响。结果表明,试验45d和75d后,两个试验组的射精量均高于对照组,其中试验一组差异显著（P〈0．05）;精子密度均显著（P〈0．05）高于对照组;顶体完整率高于对照组,其中试验二组在试验75d后与对照组差异极显著（P〈0．01）;美兰褪色时间极显著（P〈O．01）低于对照组;两个试验组的精子活率、畸形率和解冻后活率与对照组均差异不显著（P〉0．05）。对于本复方中草药添加剂而言,辽宁绒山羊种公羊按照10g／d的剂量饲喂即达到了改善精液品质和提高生产效率的目的。 相似文献
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4.
在新疆相同饲养条件下,本试验中德国内用美利奴羊F1和F2母羊的繁殖成活率显著比新疆细毛羊母羊要高（P〈0．01）。试验对1．52rR羊的初生重、3月龄断奶重和3900只周岁羊体重的生长发育性能进行了测定,结果表明,虽然都是在断奶后随群放牧,德国肉用美利奴F1和F2与新疆细毛羊后代在初生重、断奶重和周岁体重上具有极显著差异（P〈0．01）,其生长速度明显快于新疆细毛羊后代（P〈0．01）;公、母羔初生重明显大于新疆细毛羊后代（p〈0．01）,而德国内用美利奴F1和F2的公、母羔初生重无明显的差异（P〉0．05）。本实验发现,至3月龄断奶时,德国内用美利奴F1、F2与新疆细毛羊后代公羔平均体重差异分别达到6．59kg和7．47妇（P〈0．01）,而德国肉用美利奴F1和与F2之间却无明显的差异（P〉0.05）。本试验对周岁羊的体重测试结果表明,在同样的饲养条件下,德国内用美利奴F1和F2周岁公羊的体重可达到66．81kg和69．34kg,而新疆细毛羊后代公羔仅为47．11kg（P〈0．01）。本试验采用德国肉用美利奴公羊杂交后,周岁和二岁羯羊、母羊的剪毛量明显比同年龄的新疆细毛羊要高（P〈0．01）,毛长亦具有同样的趋势（P〈0．01）。实验对德国内用美利奴F1与F2的羔羊宰前活重、胴体重、屠宰率和净肉重进行测定,结果表明无明显的差异（P〉0．05,）,而与新疆细毛羊杂交羊相比,具有明显的差异（P〈0．01）。 相似文献
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为探讨伏牛白山羊的屠宰性能和肉质特性,对10只伏牛白山羊进行屠宰性能、肉质常规指标测定和肌肉氨基酸含量测定。结果表明,伏牛白山羊母羊的宰前体重、胴体重、净肉重、内脏脂肪重、胴体净肉率、肉骨比均高q-＆羊,差异不显著（P〉0．05）;公羊的屠宰率、净肉率高于母羊,差异不显著（P〉0．05）;伏牛白山羊公羊肉质中水分含量、脂肪含量、蛋白质含量、灰分含量均高于母羊,差异不显著（P〉0．05）;伏牛白山羊公羊肌肉干物质中必需氨基酸和非必需氨基酸舍量均高于母羊,差异不显著（P〉0．05）。 相似文献
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试验选用17周龄个体发育良好、冠髯大而鲜红的海兰褐种公鸡90只,随机分为6组,每组15只。饲粮锌添加量分别是33mg／kg、66mg／kg、99mg／kg、132mg／kg、165mg／kg、198mg／kg,以研究不同锌添加水平对种公鸡精液品质及配种性能的影响。结果表明,种公鸡饲粮中锌水平在33-132mg／kg范围内时,随锌添加量的增加对提高射精量和降低精子畸形率有极显著影响（P〈0．01）,同时对种蛋的受精率和孵化率也有显著影响（P〈0．05）。锌添加量在198mg／kg时,射精量、精子畸形率、受精率和孵化率表现均较差（P〈0．05）。 相似文献
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试验测定了陇东绒山羊生长发育规律。结果表明：陇东绒山羊在哺乳期生长发育快,日增重高,6月龄公母羊体质量分别为14．37kg和13．23kg,是出生时的6．3倍和5．8倍,日增重分别为67．05g和60．83g,公羊生长发育速度快于母羊,差异不显著（P〉0．05）;周岁公母羊体质量分别为18．52kg和17．94kg,日增重分别为23．06g和26．17g,母羊生长发育速度快于公羊,差异不显著（P〉0．05）;2岁公母羊体质量分别为29．45kg和23．84kg,日增重分别为29．95g和16．16g,公羊生长速度快于母羊,差异显著（P〈0．05）;成年公母羊体质量分别为33．77kg和24．01kg,日增重分别为11．58g和0．47g,公羊生长速度快于母羊,差异极显著（P〈0．01）;成年以后,公母羊体尺体质量指标均有所下降。因此,应抓好各年龄阶段特别是哺乳期及育成期的饲养管理,以保证和充分发挥绒山羊的生产性能。 相似文献
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夏季高温情况下,选择某猪场8头种公猪,随机分为2组,即牡蛎粗多糖试验组、对照组,对试验期间公猪的精液量、精子活力进行统计,并采集试验前后精液,检测精子密度、精子畸形率、精液抗氧化MDA、SOD、GSH-PX指标。结果：牡蛎粗多糖试验组公猪的射精量、精子活力比对照组都有一定水平提高,但差异不显著（P〉0．05）;牡蛎粗多糖试验组的精子密度增加0．32亿个／mL,差异不显著（P〉0．05）,精子畸形率减少了4．26％,差异显著（P〈0．05）;试验组精液SOD、GSH-PX显著提高（P〈0．05）;MDA含量极显著降低（P〈0．01）。结论：在夏季高温情况下,牡蛎粗多糖对精液抗氧化指标和种公猪的生精功能有较明显改善作用。 相似文献
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青海细毛羊2岁母羊毛纤维细度明显细于公羊，差异显著（P〈0．05）。其它各年龄母羊之间，差异不显著（P〉0．05）；单位面积上毛纤维根数周岁母羊明显的少于公羊和其它年龄的母羊，差异极显著（P〈0．01）。 相似文献
10.
选用40头28日龄断奶约滇陆（YN1）杂交仔猪进行为期5周的试验，试验仔猪随机分为5个组（锌添加量分别为80，240，1000，3000和5000mg／kg），研究锌对断奶仔猪生产性能、免疫器官生长发育及组织锌沉积的影响。结果表明：适量高锌（1000mg／kg和3000mg／kg）能显著提高仔猪生产性能（P〈0．05）：补锌对免疫器官指数无影响（P〉0．05）：高锌增加肝脏、肾脏、趾骨、血清和毛发中锌含量（P〈0．01）：而背最长肌、扁桃体和胸腺锌含量则只有在添加5000mg／kg日粮锌时含量显著上升（P〈0．05）。脾脏锌含量则随着高锌的添加变化差异不显著（P〉0．05）。低锌添加（80mg／kg和240mg／kg）对机体各组织中锌含量无显著影响（P〉0.05）。 相似文献
11.
Egil Simensen Sigrun Hauge 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(3):120-126
A study of ewe performance was undertaken in 795 sheep flocks based on data from the Norwegian Sheep Recording System. Herd level data included in the annual report for 1998 were used as the basis for the study. Average flock size was 75.3 ewes. The material was considered as representative of the better and more motivated sheep farmers in the mountain valley regions in south-eastern Norway. The average number of lambs born per ewe, inclusive (and exclusive) of barren ewes, was 1.89 (2.02), and of autumn lambs (those surviving from birth in the spring to autumn) 1.60 (1.66). The average autumn weight of the lambs corrected to 145 days of age was 42.4 kg, giving an overall performance of 67.9 kg lambs live weight per ewe. When including artificially reared lambs, overall performance was 70.4 kg per ewe. Artificial rearing of lambs, mostly triplets which had been removed from the ewe, was practised on 395 of the farms. In the 74 flocks with a rate of artificial rearing of more than 10% of all lambs, overall performance per ewe was 13.3 kg higher than in flocks with no artificial rearing. Total lamb mortality from birth to autumn recording, including stillborn lambs, was 12.44%. Mortality had a skewed distribution, some flocks having very high mortality figures. The arithmetic means (and medians) for mortality were as follows: 2.75 (2.29)% stillbirths, 2.93 (2.30)% died during the indoor feeding period, 0.88 (0.00)% at spring pasture, and 6.16 (4.40)% at summer pasture. In regression models using Proc Genmod in SAS®, it was found that average number of autumn lambs per ewe was negatively associated with the rate of barren ewes, late lambing date (flock average day in year when lambing took place), and total lamb mortality. The corrected autumn weight of the lambs was positively associated with the average number of lambs born per ewe and non-fertility rate, and negatively associated with flock size and total lamb mortality. The Dala breed had a positive effect on number of autumn lambs per ewe, and Spæl breed a negative effect on corrected autumn live weight of the lambs. 相似文献
12.
哺乳期母羊补饲捆裹青贮燕麦草对羔羊断奶重的影响 总被引：2，自引：0，他引：2
杨青英 《青海畜牧兽医杂志》2005,35(2):7-8
用捆裹青贮燕麦草给哺乳期母羊补饲,前40d母羊0．6kg／d只,后50dlkg／d只。90d断奶时,试验组比对照组羔羊多增重0．73kg(P＞0．05),比率为10．22％;试验组母羊断奶体重比对照组少减重1．33kg(P＞0．05),比率为23．84％。 相似文献
13.
The Small-tail Han ewes with 3 years old, (48.7±2.0)kg body weight, carring the multi-lamb gene, were fed with the same diet, mating after one month.18 pregnant ewes were selected and divided into 3 groups(groups 1(control group), 2 and 3).From 90 days of pregnancy, groups 2 and 3 were supplemented with aerosol OT(800 mg/kg) and paraformaldehyde(300 mg/kg), respectively, and the experiments of digestion and metabolism were carried on from 121 to 130 days of pregnancy to study the effect of aerosol OT and paraformaldehyde supplements on the voluntary intake, digestion and metabolism, lambing of late-pregnant ewes.The results showed that when fed with aerosol OT, the voluntary intake of dry matter was increased by 13.0%(P<0.01);The amount of digestion of DM, OM, CP, cellulose and GE was increased by 12.4%(P<0.05), 14.4%(P<0.01), 23.2%(P<0.01), 15.2%(P>0.05) and 27.4%(P<0.01), respectively;The retention of N, Ca and P was increased by 31.1%(P<0.01), 48.5%(P<0.01) and 31.9%(P<0.01), respectively;The serum triglyceride and free fatty acid content tended to decrease;but the apparent digestibility of the dietary nutrients were not significantly affected(P>0.05);The loss of ewe postpartum weight was reduced by 61.9%(P<0.01), a nest of lamb weight was increased by 4.2%(P>0.05).In the condition of feeding paraformaldehyde, the voluntary intake of dry matter was increased by 12.6%(P<0.01);The amount of digestion of DM, OM, CP, cellulose and GE was increased by 15.4%(P<0.01), 16.2%(P<0.01), 22.4%(P<0.01), 14.2%(P>0.05) and 29.0%(P<0.01), respectively;The retention of N, Ca and P was increased by 33.5%(P<0.01), 48.9%(P<0.01) and 36.3%(P<0.01), respectively;But the apparent digestibility of the dietary nutrients were no significantly affected(P>0.05);The serum β-hydroxybutrate and free fatty acid content tended to decrease;The loss of ewe postpartum weight was reduced by 57.1%(P<0.01), a nest of lamb weight was increased by 11.1%(P<0.05).This study showed that by feeding aerosol OT or paraformaldehyde, the intake, digestibility of Ca, P and N could be improved in late-pregnant ewe, the body weight loss, body fat mobilization could be reduced, and the birth weight of litter could be increased. 相似文献
14.
在相同日粮条件下饲养3岁左右,体重(48.7±2.0)kg、具有多羔基因的小尾寒羊空怀母羊群,1个月后进行配种,从中选取18只妊娠母羊,随机分为3组(试验1(对照组)、2、3组),从妊娠90 d起,给试验2、3组分别添喂气溶胶OT(800mg/kg)和多聚甲醛(300mg/kg),并在妊娠第121~130天进行消化代谢试验,以研究添喂气溶胶OT和多聚甲醛对妊娠后期母羊自由采食量、消化代谢和产羔等的影响。结果表明,与对照组相比,添喂气溶胶OT绵羊的干物质自由采食量增加13.0%(P<0.01);干物质、有机物、粗蛋白质、纤维素和总能的消化量分别增加12.4%(P<0.05)、14.4%(P<0.01)、23.2%(P<0.01)、15.2%(P>0.05)和27.4%(P<0.01);氮、钙和磷保留分别增加31.1%(P<0.01)、48.5%(P<0.01)和31.9%(P<0.01);血清甘油三酯和游离脂肪酸含量趋于降低;但日粮养分消化率无显著变化(P>0.05);母羊体重下降减少61.9%(P<0.01),羔羊出生窝重增加4.2%(P>0.05)。添喂多聚甲醛,绵羊的干物质自由采食量增加12.6%(P<0.01);干物质、有机物、粗蛋白质、纤维素和总能的消化量分别增加15.4%(P<0.01)、16.2%(P<0.01)、22.4%(P<0.01)、14.2%(P>0.05)和29.0%(P<0.01);氮、钙和磷保留分别增加33.5%(P<0.01)、48.9%(P<0.01)和36.3%(P<0.01);而日粮消化率无显著变化(P>0.05);母羊血清β-羟丁酸和游离脂肪酸含量趋于降低;体重下降减少57.1%(P<0.01),羔羊出生窝重增加11.1%(P<0.05)。本研究表明,添喂气溶胶OT或多聚甲醛,均可提高妊娠后期母羊的自由采食量,提高消化量和钙、磷消化率,增加氮保留,减少妊娠母羊体脂的动员或利用,减缓体重下降,提高产羔窝重。 相似文献
15.
A 3-yr study was conducted to comprehensively evaluate columbia, suffolk, usmarc-composite (composite), and texel breeds as terminal sires in an extensive rangeland production system. The objective was to estimate breed-of-ram effects on ewe fertility, prolificacy, and dystocia, and sire breed effects on lamb survival and growth until weaning at approximately 132 d of age. Data were from 22 columbia, 22 composite, 21 suffolk, and 17 texel rams with 957 exposures to 574 adult rambouillet ewes (3- to 7-yr-old at lambing), 908 lambings, and 1,834 lambs. Ram breed did not affect ewe fertility (mean = 94.9%; p = 0.73), total number born per ewe lambing (mean = 2.02 lambs; p = 0.20), number born alive per ewe lambing (mean = 1.90 lambs; p = 0.24), or number weaned per ewe lambing (mean = 1.45 lambs, p = 0.94). Dystocia rates were different (p = 0.01) for ewes mated to columbia (12.2%), composite (13.5%), suffolk (25.7%), and texel rams (31.9%) during 1 yr of the study, but differences among ram breeds were not repeatable (p ≥ 0.38) during the other 2 yr. Suffolk-sired lambs were heavier (p ≥ 0.02) at birth (5.5 kg) and weaning (40.3 kg) than lambs sired by the other breeds, which did not differ (p ≥ 0.34) for birth weight (mean = 5.3 kg). Texel-sired lambs (37.4 kg) were lighter (p ≥ 0.02) at weaning than columbia- (38.8 kg) and composite-sired (38.4 kg) lambs, which did not differ (p = 0.40) for weaning weight. Sire breed effect approached significance (p = 0.06) for lamb survival to weaning; estimated survival probabilities were 0.87 (columbia), 0.89 (composite), 0.93 (suffolk), and 0.86 (texel) for lambs reared by their birth dam. Interaction between sire breeds and birth weight affected (p < 0.001) lamb survival and revealed that lightweight columbia- and suffolk-sired lambs had a greater risk of death than lightweight lambs sired by composite and texel rams, but risk of death did not increase substantially for heavyweight lambs from any of the breeds. When mated to adult rambouillet ewes in an extensive rangeland production system, the use of suffolk rams is warranted to improve preweaning growth of market lambs and is not predicted to affect ewe fertility, ewe prolificacy, dystocia, or lamb survival compared with the other sire breeds we tested. 相似文献
16.
Pfeffer A Shaw RJ Green RS Phegan MD 《Veterinary immunology and immunopathology》2005,108(3-4):315-323
The transference of immunoglobulins from six New Zealand Romney ewes to their lambs was examined. Immunoglobulin levels were determined in ewe plasma, colostrum and lamb plasma shortly after birth and before the lambs fed, in lamb plasma 2 days after birth, and lamb plasma, ewe plasma and milk 30 days after parturition. Levels of total IgE, and IgE, IgG1, IgG2, IgM, and IgA with specificity for Trichostronglus colubriformis third stage larval secretory/excretory products (TcL3E/S) were determined. Mean levels of total IgE were three times higher in colostrum than in parturient ewe plasma while only trace amounts were detected in milk at 30 days after birth (107.7, 34.3, and 0.2U ml(-1), respectively, differences between means P< or =0.01). Mean total IgE in lamb plasma rose from being undetectable before suckling to levels comparable to those of the ewes by 2 days after birth (21.7U ml(-1)) and then declined to low levels by 30 days (0.4U ml(-1)). Total IgE levels in lamb plasma were significantly correlated with levels in ewe plasma and colostrum (r=0.91, P< or =0.01; r=0.96, P< or =0.003, respectively). The transference of TcL3E/S-specific IgE, IgG1 and IgA was substantial with mean levels of these antibodies in lamb plasma at 2 days comparable to that in parturient ewe plasma (absorbance levels in lamb plasma of 0.283, 0.537, and 0.334, respectively). Proportionally less maternal IgM and IgG2 appeared to be transferred to the lambs (absorbance of 0.112 and 0.081, respectively). Levels of TcL3E/S-specific IgE and IgG1 in lamb plasma at 2 days were significantly correlated with levels in parturient ewe plasma and colostrum (r=0.89 and 0.82, 0.85 and 0.96; all P< or =0.05, respectively). These results indicate that IgE is concentrated in ewe colostrum and that substantial amounts of maternal IgE are transferred to lambs via colostrum. Further, the results suggest that humoral immunity against gastro-intestinal nematode parasites and potentially other parasites in colostrum-fed lambs may approximate that of the ewe. The implications of the transference of humoral immunity through colostrum in ruminants for the passive protection and the development of active immunity against parasites remains to be fully explored. 相似文献
17.
Objectives of this study were to estimate the magnitude of the effects of various factors associated with ewes and their ram lamb mates on fertility, prolificacy, lamb survival, lamb weaning weight and ewe productivity and to estimate the heritability and repeatability of each trait. Records from 731 ewe-years, 75 ram lamb sires and 616 lambs born from the University of Illinois Rambouillet flock were used. Ewes mated to single-born ram lambs had higher fertility rates (P less than .01), gave birth to lambs with higher survival rates (P less than .01), weaned lighter (P less than .05) individual lambs but weaned more weight of lamb per ewe exposed (P less than .01) than ewes mated to multiple-born ram lambs. Ram lamb breeding weight, ram lamb scrotal circumference, ewe breeding weight and ewe age had relatively large and positive effects on the composite trait of weight of lamb weaned per ewe exposed and significant effects on a number of the component traits. Heritability and repeatability estimates were, respectively, as follows: fertility, 3%, 3%; prolificacy, 34%, 19%; lamb survival, 15%, 8%; lamb weaning weight, 7%, 36%; and ewe productivity, 27%, 10%. 相似文献
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母羊的生殖应激主要包括母羊主动应激、母羊被动应激以及胎羊宫内应激。适当的生殖应激是正常发情、维持妊娠、发动分娩、顺利哺乳的重要生理基础。但长期或过度的生殖应激，将引起母羊代谢紊乱、免疫功能损害、生殖障碍以及胎羊或羔羊发育受阻等，这一系列能造成母体健康损害的疾病和临床表现，被定义为“母羊生殖应激综合征”。本文对母羊生殖应激及母羊生殖应激综合征进行了定义，并对生殖应激理论的综合临床应用进行了探讨，为预防和治疗生殖疾病(如妊娠期毒血症、产后乏力、子宫内膜炎等)提供了理论依据。 相似文献
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AL Ridler CM Miller DM Leathwick S Ganesh CB Garland HM Bruce 《New Zealand veterinary journal》2019,67(2):105-108
AIMS: To investigate the production responses and cost-benefit of administering a controlled-release anthelmintic capsule (CRC) to pregnant yearling ewes prior to lambing.
METHODS: Yearling ewes from two commercial sheep flocks (A, n=489; B, n=248) in the North Island of New Zealand were enrolled in the study. Prior to lambing, CRC containing albendazole and abamectin were administered to half the ewes while the other half remained untreated. Ewe liveweights and body condition scores were measured prior to lambing, at weaning and, for Flock B, prior to subsequent mating. Lambs were matched to dams shortly after birth and the weight and number of lamb weaned per ewe were determined. A cost-benefit analysis was undertaken for Flock B considering the increased weight of lamb weaned per ewe, and the weight of ewes at the next mating and the benefit in terms of lambs born.
RESULTS: The mean weight at weaning of treated ewes was greater for treated than untreated ewes by 2.76 (95% CI 0.64–4.88)?kg in Flock A (p<0.001) and 2.35 (95% CI ?0.41–5.12)?kg in Flock B (p=0.003); the weight of lamb weaned per ewe was greater for treated than untreated ewes by 1.43 (95% CI ?0.71 to –3.49)?kg in Flock A (p=0.041) and 3.97 (95% CI 1.59–6.37)?kg in Flock B (p<0.001), and ewe liveweight prior to subsequent mating was greater for treated than untreated ewes in Flock B by 4.60 (95% CI 3.6–5.6)?kg (p<0.001). There was no difference in the percentage of lambs reared to weaning between treated and untreated ewes in either flock (p>0.8). The overall cost-benefit of treatment for Flock B was NZ$9.44 per treated ewe.
CONCLUSIONS AND CLINICAL RELEVANCE: Pre-lambing CRC administration to yearling ewes resulted in increased ewe weaning weights and weight of lamb weaned in both the flocks studied. There was an economic benefit in the one flock where this was assessed. 相似文献