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1.
本试验在山丹县境内祁连山浅山区选择饲养条件相对一致的10户养羊户,其中5户采用冷季全舍饲模式(试验组),另外5户采取放牧+补饲模式(对照组),开展冷季不同饲养模式对肉羊生产效益影响的研究。结果表明,试验组和对照组母羊体重在产羔后1个月内分别下降了1.20和2.64kg,产羔1个月后试验组母羊体重开始恢复,对照组母羊体重持续降低,产羔后3个月对照组平均掉膘5.93㎏,占其体重13.55%。羔羊初生重组间差异不显著(P0.05),但0~2月龄试验羔羊日增重显著高于试验组(P0.05)。经济效益分析表明,试验组比对照组高出12.24元/只。 相似文献
2.
文章系统研究了福清山羊经产母羊舍饲条件下的产羔数、产羔间隔、断奶活羔率等繁殖指标,分析了产羔季节对母羊繁殖指标的影响。结果表明:舍饲福清山羊经产母羊胎平均产羔数1.64只,平均产羔间隔264 d,平均年产1.39胎,年平均产羔数2.28只,羔羊断奶成活率81.06%,羔羊平均初生重1.74 kg。舍饲条件下福清山羊一年四季均可配种产羔,但呈现一定的季节性,冬季产羔胎次明显高于其他季节,夏季产羔胎次最少;秋季的平均产羔数和平均初生重均为最高;夏、秋两季的断奶成活率明显高于冬、春季节。 相似文献
3.
试验研究了舍饲育肥与放牧育肥两种饲养模式对阿尔巴斯白绒山羊成年羊与羔羊日粮微量元素消化率的影响。采用2×2完全随机试验设计,从内蒙古白绒山羊种羊场选择5周岁成年母羊与4月龄断奶羔羊各60只,共120只,分为4组,每组30只。因素1为饲养模式,分为舍饲育肥和放牧育肥;因素2为年龄,分为成年母羊和断奶羔羊。母羊育肥期为60 d,羔羊育肥期为90 d。结果表明,绒山羊的日粮微量元素消化率存在年龄差异;在育肥前期,与羔羊组相比,成年母羊Cu的消化率极显著高于羔羊组(P0.000 1);Fe的消化率显著地低于羔羊组(P=0.02)。在育肥后期,成年母羊Cu、Zn的消化率极显著地高于羔羊组(P=0.001、P0.000 1);Fe和Mn的消化率显著地低于羔羊组(P=0.03、P=0.05)。不同饲养模式也会影响绒山羊对日粮微量元素的消化率;在育肥前期,与放牧组相比,舍饲组绒山羊Cu、Mn的消化率显著和极显著高于放牧组绒山羊(P=0.048、P0.000 1),Fe、Zn的消化率却极显著低于放牧组(P=0.003、P=0.000 4)。在育肥后期,舍饲组羔羊Cu、Mn、Zn的消化率极显著高于放牧组(P0.000 1)。 相似文献
4.
冷季暖棚对鄂尔多斯细毛羊体重及产毛性能影响的研究 《畜牧与饲料科学》2015,36(3):25-25
为评价冷季暖棚饲养方式对鄂尔多斯细毛羊体重及产毛性能的影响,将选取的基础母羊、后备母羊、育成母羊、育成公羊分别随机分成试验组和对照组。各试验组于2012年12月7日—2013年1月31日,夜间圈入暖棚内饲养,对照组夜间在圈外饲养。记录冷季暖棚试验期间暖棚内、外夜间气温,比较各试验组及对照组在冷季暖棚试验期间的体重变化。冷季暖棚试验结束后,试验羊只继续饲喂至2013年6月初。试验结束时,分别测定并比较基础母羊、后备母羊、育成母羊的试验组及对照组产毛量、羊毛长度、羊毛细度。结果表明,冷季暖棚试验期内,圈内、外夜间平均气温相差9.76℃,圈内、外最低气温相差14.10℃;基础母羊、后备母羊、育成母羊试验组体重分别比对照组少下降3.57、2.98、2.74 kg,育成公羊试验组体重比照组多提高3.08 kg;基础母羊、后备母羊、育成母羊的试验组产毛量分别比对照组增加0.22 kg（P〉0.05）、0.11 kg（P〈0.05）、0.59 kg（P〉0.05）;基础母羊、后备母羊、育成母羊的试验组羊毛长度分别比对照组增加0.40 cm（P〉0.05）、0.31 cm（P〉0.05）、0.25 cm（P〉0.05）;基础母羊、后备母羊、育成母羊试验组羊毛细度均比对照组细,且细度分别降低了0.01μm（P〉0.05）、0.09μm（P〉0.05）、0.24μm（P〉0.05）。结果提示,冷季暖棚饲养方式可有效防止鄂尔多斯细毛羊掉膘,并可提高产毛量,增加羊毛长度,降低羊毛细度。 相似文献
5.
为更好地指导乌兰察布市优质育肥羔羊生产体系建设,进一步了解在相同的饲养管理条件下,“杜蒙萨”三元杂交羔羊与当地蒙古羊羔羊在养殖效益方面的对比情况,进行了“杜蒙萨”三元杂交羔羊产肉性能试验。试验分为试验组（“杜蒙萨”三元杂交羔羊组）和对照组（蒙古羊羔羊组）2个组,每组采取随机取样方式选择试验用羊。经过体重测定与屠宰试验测定,统计试验数据,通过分析试验数据进行经济效益对比。试验结果显示,在自然环境和饲养管理条件完全相同的条件下,经过对生长及产肉性能测定数据的整理、统计和分析,“杜蒙萨”三元杂交组羔羊平均初生重、断乳重、5月龄出栏活重、5月龄平均日增重均高于对照组蒙古羊羔羊。试验充分证明了在牧区推广“杜蒙萨”三元杂交羊生产体系建设,是实现牧区草原生态高效养殖和促进农牧民养殖户提质增效的有效途径之一。 相似文献
6.
对内蒙古太仆寺旗典型草原全年连续放牧的家畜饲养方式,通过绵羊冬春暖棚舍饲饲养与放牧饲养对比试验,利用中国西部草地生态经济模型对太仆寺旗家畜饲养方式进行研究和分析。结果表明：家畜能量供需不平衡是导致家畜在当年10月至次年5月,体重下降、生产性能降低的主要因素,而舍饲可以缓解家畜能量需求不平衡状况。从当年12月至次年4月,暖棚日平均温度和夜平均温度分别比室外温度提高10℃和5℃,且差异显著（P〈0.05）;在此阶段对家畜进行暖棚舍饲饲养,可减少母羊掉膘量3 kg/只,羔羊可增重1.25 kg/只。冬春季节实施暖棚舍饲对提高典型草原家畜圈舍的温度,减少家畜体能消耗,减少家畜掉膘量和促进草地畜牧业可持续发展具有重要意义。 相似文献
7.
内蒙古牧区察哈尔羔羊饲粮钙磷适宜水平研究 总被引：1，自引：0，他引：1
本试验采用4个不同钙磷水平的饲粮饲喂断奶后察哈尔羔羊,研究钙磷对断奶羔羊生长、钙磷营养消化代谢和排放量、骨骼的影响。选取70日龄健康、体重(16.27±3.33) kg断奶察哈尔羔羊120只(公母各半),随机分成4个组,每组30个重复,每个重复1只羊,分别饲喂4种饲粮,其钙磷含量分别为:Ⅰ组,0.49%、0.28%;Ⅱ组,0.55%、0.32%;Ⅲ组,0.64%、0.47%;Ⅳ组,0.87%、0.70%。饲养试验期65 d,其后,每组选6只羔羊(公母各半),全收粪法进行消化代谢试验。试验结果:1)饲粮钙磷水平对断奶羔羊平均日增重、体尺、干物质采食量和饲粮转化率影响皆不显著(P>0.05);2)血清钙含量Ⅳ组显著高于其他3组,血清碱性磷酸酶Ⅰ组显著高于其他3组(P<0.05);3)Ⅰ组钙表观消化率显著高于其他3组(P<0.05),随饲粮钙磷水平升高羔羊钙磷排放量增加(P<0.05);4)Ⅳ组胫骨灰分含量显著高于Ⅰ组(P<0.05),Ⅰ组跖骨灰分含量显著低于Ⅲ、Ⅳ组(P<0.05),胫骨磷含量Ⅳ组显著高于其他3组(P<0.05);5)冬春季节改变羔羊饲喂模式增加了内蒙古地区草原生态系统中钙磷的输入。综上所述,饲粮钙磷水平升高降低了断奶羔羊的钙表观消化率,显著增加了钙磷的排放量,提高了羔羊骨骼钙磷沉积。在本试验条件下,饲粮钙磷含量分别为0.49%、0.28%,内蒙古地区冬春季断奶羔羊即可获得较好的生长性能。 相似文献
8.
于2008年12月－2009年4月在乌鞘岭半农半牧区随机选择10个牧户，各牧户草地类型一致，绵羊体况相近，其中5户采用全舍饲的饲养模式（试验组），另外5户采用放牧+补饲的饲养模式（对照组），开展冷季不同饲养模式对绵羊生产效益影响的试验。结果表明，试验组和对照组母羊体质量在产羔后1个月内分别下降了1.17和2.71 kg。产羔1个月后试验组母羊体质量开始恢复，而对照组母羊体质量持续降低；产羔后3个月对照组母羊平均掉膘5.96 kg，占体质量的13.91%，试验组体质量增加0.68 kg。两组羔羊的初生体质量差异不显著(P>0.05)，但试验组羔羊生长速度高于对照组，羔羊2月龄体质量及出栏体质量显著高于对照组(P<0.05)。经济效益分析表明，试验组收入较对照组高出20.27元·只-1。 相似文献
9.
《畜牧兽医杂志》2017,(4)
甘南欧拉型藏羊一般为一年一胎,一胎一羔,初配年龄在1.5岁左右,成年母羊繁殖成活率为74.17%,繁殖性能低。根据配种季节不同可分为冬羔和春羔。冬羔成活率为92.51%,春羔成活率为85.49%,冬羔初生重显著高于春羔(P0.05),冬羔5月龄时平均体重为29.5kg,同月龄的春羔为27.5kg。经测定1岁冬羔剪毛量为0.75kg;春羔剪毛量为0.55kg。冬羔显著高于春羔(P0.05)。冬羔优于春羔,要加大冬羔的生产。母羊繁殖性状也受到年龄的影响,1.5岁初配羊与成年母羊相比,成年母羊产羔数、断奶数和初生重显著增加,经产母羊繁殖成绩高于初配母羊。为了进一步提高甘南欧拉羊的繁殖性能,还需要加强饲养管理,加强暖棚养殖和冷季补饲工作,研究推广频繁产羔体系,以期充分发挥其生产潜力。 相似文献
10.
内蒙古典型草原家庭牧场暖棚舍饲养羊效益分析 总被引：1，自引：0，他引：1
对内蒙古太仆寺旗典型草原全年连续放牧的家畜饲养方式,通过绵羊冬春暖棚舍饲饲养与放牧饲养对比试验,利用中国西部草地生态经济模型对太仆寺旗家畜饲养方式进行研究和分析.结果表明:家畜能量供需不平衡是导致家畜在当年10月至次年5月,体重下降、生产性能降低的主要因素,而舍饲可以缓解家畜能量需求不平衡状况.从当年12月至次年4月,暖棚日平均温度和夜平均温度分别比室外温度提高10 ℃和 5 ℃,且差异显著(P<0.05);在此阶段对家畜进行暖棚舍饲饲养,可减少母羊掉膘量3 kg/只,羔羊可增重1.25 kg/只.冬春季节实施暖棚舍饲对提高典型草原家畜圈舍的温度,减少家畜体能消耗,减少家畜掉膘量和促进草地畜牧业可持续发展具有重要意义. 相似文献
11.
P J Waller J R Donnelly R J Dobson A D Donald A Axelsen F H Morley 《Australian veterinary journal》1987,64(11):339-343
The pre-weaning production of ewes and lambs in spring on pastures grazed during the previous autumn and early winter by either weaner sheep, adult sheep, or cattle was investigated together with estimating the benefits of pre- and post-lambing drenches to ewes. These treatments were compared with one in which parasitism was uncontrolled in ewes lambing on pastures grazed previously by untreated weaner sheep, and another where parasitism was suppressed by 2-weekly drenching of the weaner sheep and also of the ewes and their lambs. Prior grazing by cattle effectively eliminated infection of pastures with intestinal Trichostrongylus and Nematodirus spp, but less so for Ostertagia spp. Worthwhile reductions in contamination were also achieved by grazing by adult sheep compared with grazing by undrenched weaners. Despite differences in the parasitological status of the pastures, there were no indications that pre-weaning growth rates of lambs were affected. However, wool growth in ewes was reduced by 10 to 20% by parasite infection. Wool growth of ewes on pastures grazed by cattle during the pre-experimental period exceeded that on any other treatment, and was significantly greater than that of ewes on pastures grazed by undrenched weaners. There was no production benefit in giving a pre-lambing drench to ewes on plots contaminated by weaners, or in giving the additional post-lambing drench to ewes grazing on plots contaminated by weaners, adult sheep or cattle. 相似文献
12.
产羔期、补饲水平对考力代羊生产和繁殖性能影响的研究 总被引：2，自引：1，他引：1
为了研究草地一绵羊系统中草畜供求间的动态平衡，寻求在人工草地放牧条件下适宜的产羔时期及在此时期给产羔母羊的合理补饲水平，１９９０～１９９３年，在贵州省威宁县灼甫联户示范牧场进行了两期产羔期及补饲水平对绵羊生产性能影响的试验。产羔期的改变，导致了母羊及羔羊体重的不同变化趋势。结果显示出母羊体重对其生产、繁殖性能的重要性。春羔母羊配种前体重较之冬羔母羊提高９．７５ｋｇ，两者产羔率分别为１３９．２％和１１６．１％。春羔母羊较高的双羔率导致了春羔母羊较之冬羔母羊更低的繁殖成活率（分别为９１．２％和１０４．７％）。断奶时，春羔较之冬羔体重高５．２５ｋｇ，但断奶以后这种优势即消失了。补饲水平的差异对母羊及羔羊体重有一定的影响，但在牧草丰富的条件下表现得并不很强烈。 相似文献
13.
E. Simensen P. S. Valle S. Vatn 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(3):194-201
Abstract Factors influencing rate of barren ewes, number of lambs born per pregnant ewe, and autumn live weight of the lambs were studied in 627 Norwegian sheep flocks based on herd level data from the Norwegian Sheep Recording System and a mailed questionnaire to the sheep farmers. The following factors were significantly associated (P<0.05) with rate of barren ewes: breed, herd average lambing date, type of production/age of farmer, routines for treatments for parasites, and housing type. Number of lambs born per pregnant ewe was significantly associated with rate of barren ewes, herd average lambing date, breed, percentage grass silage of total roughage, and no separation of gimmers during the housing period. Corrected autumn live weight of the lambs was significantly associated with breed, flock size, lambs born per pregnant ewe, no separation of gimmers during the housing period, and type of summer pasture. 相似文献
14.
Efficiency of Duddingtonia flagrans against Trichostrongyle infections of sheep on mountain pastures
The control of sheep nematode parasites in extensive mountain/transhumant management systems using the nematophagous fungus Duddingtonia flagrans was assessed in this study. Two groups of Churra Tensina ewes were allowed to graze for 8 weeks in autumn on two separate paddocks of infected pasture near their winter sheds in the valley. At lambing, ewes and their twin lambs were turned out into the same paddocks for the following 12 weeks. One group of ewes received a daily dose of 5 x 10(5) chlamydospores of Duddingtonia flagrans/kg live weight per day both in autumn and in spring, while the other group was used as a non-treated control. Daily dosing of grazing ewes with the fungus D. flagrans had a clear effect on reducing autumn pasture contamination. This had a subsequent effect on the over-wintering larvae population that was confirmed by a 20% lower worm burden of tracer lambs kept in early spring on the paddock previously grazed by fungus treated ewes. In spring, pasture contamination was also significantly reduced in the paddock grazed by fungi-treated ewes and their lambs showed a 61% lower worm burden and a better performance than the control lambs. Results herein show that fungal spores fed to sheep at critical times with regard to the epidemiology of parasite infection, can have a significant effect on the infective larvae present on pasture, which could further improve lambs performance. This novel approach to parasite control would be of interest amongst both organic and conventional sheep farmers operating in mountain regions. 相似文献
15.
Two accelerated lambing systems, Morlam using Morlam sheep (USDA, Beltsville 1966 to 1975) and Camal using Dorset ewes (Cornell 1978 to 1981), were evaluated for first lambing ages, interlambing intervals and conception probabilities. Morlam ewes were continuously exposed to rams over the year, while Camal Dorset ewes were exposed every other month. Morlam lambs were mated as early as 367 d of age and Camal Dorset lambs as early as 340 d. Early lambing was associated with higher rates of perinatal mortality (P greater than .05) and smaller litter size (P less than .01). Lambing years among Morlam ewes and season of birth of Camal Dorset ewes influenced (P less than .01) their first lambing ages. Lambing intervals averaged 293 and 303 d among Morlam and Camal Dorset ewes, respectively. Age at first lambing and season in which the previous lambing occurred with influential factors (P less than .01) on lambing intervals of Morlam ewes; longer intervals resulted when ewe lambs were mated at early ages (less than 12 mo), and when the previous lambing occurred in winter. Estimates of conditional probabilities of conception by month given the occurrence of estrus, reflected seasonal changes in both systems. The overall probability of conception for the Morlam system (P = .16) was relatively higher than that for the Camal Dorset system (P = .14); numbers of lambings per ewe per yr were 1.28 and 1.21, respectively. Estimates of heritability for age at first lambing, lambing interval and conception probability were .31, .06 and .30, respectively. 相似文献
16.
17.
Campbell AJ Croser EL Milne ME Hodge PJ Webb Ware JK 《Australian veterinary journal》2012,90(6):235-239
Background Several outbreaks of goitre, considered to be related to iodine deficiency, occurred in sheep flocks throughout Victoria in 2010. Objective We describe one outbreak in Merino–Border Leicester‐cross ewes and their lambs in north‐east Victoria that appeared to be associated with increased rainfall and pasture growth, particularly during the preceding summer and autumn. Results The outbreak was characterised by a four‐fold increase in neonatal lamb deaths and goitre, alopecia and poor skeletal development in the lambs. Most cases occurred in lambs born to 2‐year‐old crossbred ewes that had grazed long, lush perennial pastures throughout their entire pregnancy, whereas few cases occurred in mature crossbred or Merino ewes that had grazed shorter, annual pastures on hill country for 3 weeks in late pregnancy but were otherwise managed similarly. Conclusion Existing recommendations for south‐eastern Australia are that only spring‐lambing ewes in iodine‐deficient areas require iodine supplementation to prevent goitre in years with high autumn–winter rainfall. Aspects of this outbreak suggest that ewes lambing at other times of the year and grazing abundant pasture for prolonged periods may also require supplementation to prevent goitre, even if autumn–winter rainfall does not exceed previously established thresholds. 相似文献
18.
A series of 10 farm trials was conducted in which the lambing performance of ewes immunised against polyandroalbumin was compared with that of untreated ewes in the same flock. The trials show that polyandroalbumin treatment is a reliable method of increasing lambing and tailing percentages in New Zealand flocks. An average of 39 extra lambs born per 100 ewes tupped was achieved on farms where ewes were given two treatments about four weeks apart and rams were introduced 18-26 days after the second dose. On farms where rams were introduced less than 12 days after this booster injection an average of 19 extra lambs born per 100 ewes tupped resulted. On farms where rams were introduced at 18-26 days post booster injection an average of 35 extra lambs were tailed for every 100 ewes tupped. The response for immunization increased in direct relation to the liveweight of the ewes at tupping. 相似文献
19.
Egil Simensen Camilla Kielland Fr?ydis Hardeng Knut E B?e 《Acta veterinaria Scandinavica》2014,56(1):26