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试验研究了半胱胺(Cs)对藏绵羊断奶羔羊增重、饲料转化效率的影响。将40只(公母各半)80日龄左右且体重平均为(16.00±0.31)kg的藏绵羊断奶羔羊随机分为2组(试验组和对照组),在日粮精料中添加300 mg/(kg·BW)的Cs,隔日添加1次,试验期42 d。分别于开始用药后的第0、7、14、21、28、35天称重,并记录各组所采食的精料量。试验结果表明,试验组精料中添加Cs使藏绵羊断奶羔羊35 d增重提高43.25%(P0.01),开始用药后的前7 d差异不显著,但8~35 d最为明显,以后随时间延长促生长效果逐渐减弱;精料/增重比下降43.33%。 相似文献
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半胱胺对羔羊增重及羊毛生长的影响 总被引:11,自引:0,他引:11
选择 4~ 5月龄断奶雌性杂种羔羊 2 2 0只 ,随机分成对照组和添加半胱胺组 ,半胱胺组按 5 0mg/kg体重包膜保护半胱胺 ,连续添加 12 0d ,试验结束。结果显示 ,半胱胺组从试验第 4 6天体重、毛长显著高于对照组 (P <0 .0 5 ) ,整个试验期半胱胺组比对照组增重提高 17.9% (P <0 .0 5 ) ,毛长增长提高 6 .2 % (P <0 .0 5 ) ,说明半胱胺能够显著地促进断奶母羔体重增加和羊毛生长。 相似文献
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选用3~4月龄的青海藏羊断奶羔羊20只,随机分为对照组和试验组两组。在基础日粮和饲养方式完全相同的情况下,在试验组日粮中添加硒0.15 mg/kg,铁60 mg/kg,对照组只饲喂基础日粮,进行45 d舍饲试验。结果表明,试验期对照组、试验组只均增重和平均日增重分别为4.02±0.68 kg、5.84±0.83 kg和93.34±15.18 g、129.78±18.50 g,试验组羊只的增重明显高于对照组(P<0.01)。在整个试验期间,试验组每只羊毛利润比对照组多13.12元,经济效益明显。 相似文献
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用2个不同配方的育肥料对断奶羔羊进行育肥,研究不同营养水平的日粮对羔羊育肥效果的影响。试验Ⅰ、Ⅱ组饲喂2种较高营养水平的育肥料,试验Ⅲ组(对照组)羔羊饲喂较低营养水平的普通日粮。结果表明:日粮营养水平直接影响到育肥效果。在一定范围内随着日粮营养水平的增加,育肥效果也随之提高。营养水平较高的试验Ⅰ组和营养水平中等的试验Ⅱ组的羔羊日增重分别达178.83 g和154.17 g,较试验Ⅲ组的124.50 g分别提高了43.63%和23.82%,差异显著(P<0.05)。试验Ⅰ、Ⅱ组每只羔羊纯增收益分别为123.40元和101.00元,比试验Ⅲ组的70.80元分别提高了74.29%和42.65%,差异极显著(P<0.01),且试验Ⅰ组育肥效果优于试验Ⅱ组。 相似文献
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R B Harvey L F Kubena D E Corrier D A Witzel T D Phillips N D Heidelbaugh 《American journal of veterinary research》1986,47(7):1630-1632
A wheat diet containing deoxynivalenol (vomitoxin) at 15.6 mg/kg was fed to crossbred lambs for 28 days. Feed consumption, weight gain, and feed efficiency of deoxynivalenol-treated lambs did not differ (P less than 0.05) from those values of controls. Group differences were not noted for hematologic or serum biochemical variables, and gross or microscopic lesions were not observed in treated lambs. 相似文献
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Lambs weaned at eight weeks old were compared with control lambs which remained with their dams; both groups grazed the same pasture. Weaning significantly reduced the growth rate, control lambs being, on average, 6 kg heavier than weaned lambs at 15 weeks old. When contamination of pasture with larval parasites was light, both groups of lambs suffered only modest parasitic infections. When lambs were experimentally infected with 5000 Haemonchus contortus and 10,000 Trichostrongylus colubriformis larvae at eight weeks old, the mean faecal egg count for weaned lambs was twice that for controls at 12 weeks old (P less than 0.001) and weaned lambs suffered a significantly greater decline in packed cell volume than controls over the next four weeks. Antibody responses following immunisation with either ovalbumin or Brucella abortus at four and at eight weeks old, did not differ significantly between control and weaned lambs. In contrast serum antibody responses to H contortus and T colubriformis differed significantly between the two groups, with controls responding earlier and more strongly than weaned lambs. The practical significance of these findings is that up to three months old, suckled lambs, when faced with a substantial parasite challenge, have much better prospects than weaned lambs. 相似文献
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分析探讨口感化及颗粒化开食料对早期断奶羔羊生长和胃肠道发育的影响。选取新生健康的双羔湖羊公羔42只,随机分为两组,分别饲喂颗粒化和口感化开食料,试验期42 d。两组羔羊21日龄之前的采食量、体重和绝对生长的变化趋势相似。21日龄以后,口感化开食料组羔羊的采食量、体重、绝对生长和相对生长均明显高于颗粒化开食料组,42日龄体重、后两周的采食量及15~21日龄的相对生长率在两组间有显著差异(P < 0.05)。口感化开食料还显著提高(P < 0.05)了羔羊42日龄时的育肥指数、体长指数、胸围指数、管围指数和断奶前的瘤胃质量和瘤胃/胴体。以上结果表明,与颗粒化开食料相比,口感化开食料更有利于羔羊早期断奶前后的瘤胃发育、采食量提高、体重和体尺的发育,但对其他胃室及肠道发育没有影响。 相似文献
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分析探讨口感化及颗粒化开食料对早期断奶羔羊生长和胃肠道发育的影响.选取新生健康的双羔湖羊公羔42只,随机分为两组,分别饲喂颗粒化和口感化开食料,试验期42 d.两组羔羊21日龄之前的采食量、体重和绝对生长的变化趋势相似.21日龄以后,口感化开食料组羔羊的采食量、体重、绝对生长和相对生长均明显高于颗粒化开食料组,42日龄体重、后两周的采食量及15~21日龄的相对生长率在两组间有显著差异(P<0.05).口感化开食料还显著提高(P<0.05)了羔羊42日龄时的育肥指数、体长指数、胸围指数、管围指数和断奶前的瘤胃质量和瘤胃/胴体.以上结果表明,与颗粒化开食料相比,口感化开食料更有利于羔羊早期断奶前后的瘤胃发育、采食量提高、体重和体尺的发育,但对其他胃室及肠道发育没有影响. 相似文献