不同蛋白质水平饲粮对藏羔羊生长发育的影响     

崔晓鹏  侯生珍  王志有  马辽伟 《动物营养学报》2017,29(3)

本试验旨在研究不同蛋白质水平饲粮对藏羔羊生长发育的影响。试验采用单因子随机试验设计,选取2月龄断奶、体重(20.80±2.75)kg的藏公羔羊90只,随机分成3个组(每组30个重复,每个重复1只羊),分别饲喂蛋白质水平为10.8%、12.0%和13.2%的试验饲粮。试验期为127 d,其中预试期7 d,正试期120 d。结果显示:1)12.0%蛋白质水平组藏羔羊的试验第60~90天及第90~120天日增重和平均日增重最高,料重比最低。2)12.0%蛋白质水平组藏羔羊的腹泻率及尿道感染率较低,死亡率最低。3)在试验第60天,12.0%蛋白质水平组血清总蛋白(TP)含量与10.8%和13.2%蛋白质水平组均没有显著差异(P0.05),但10.8%和13.2%蛋白质水平组之间差异显著(P0.05);在试验第90、120天,血清TP含量在12.0%和13.2%蛋白质水平组之间差异不显著(P0.05),但二者均显著高于10.8%蛋白质水平组(P0.05)。在各阶段,随着饲粮蛋白质水平的升高,血清葡萄糖(GLU)和总胆固醇(TC)含量均没有显著发生变化(P0.05)。4)12.0%蛋白质水平组的单位成本增重最高,达到73.05元/kg,总收入和净收入最高,净收入达到7 800.51元。本试验条件下,饲粮蛋白质水平影响早期断奶藏羔羊的生长发育,12.0%蛋白质水平可提高藏羔羊的日增重,降低料重比和死亡率,改善血清生化指标,提高生长性能,并降低饲养成本。  相似文献   

苏尼特羔羊肌内脂肪沉积规律及其与肌肉嫩度相关性的研究   总被引：2，自引：0，他引：2  

姚焰础  姚飞  卢德勋  高民 《中国饲料》2010,(1)

本试验以苏尼特羊为研究对象,采用单因子试验设计,对不同屠宰体重(10、20、30kg和40kg)羔羊的日增重、屠宰率和肉质进行系统研究。试验结果表明:苏尼特羔羊的体重对日增重、屠宰率、肌肉水分含量、肌内脂肪含量、剪切力和系水率都有显著影响(P0.05);肌内脂肪含量与肌肉剪切力呈极显著负相关(r=-0.983,P0.01)。  相似文献   

饲喂代乳粉对羔羊生长性能和体组织参数的影响   总被引：4，自引：0，他引：4  

岳喜新  刁其玉  邓凯东  屠焰  马春晖  杜红芳 《饲料工业》2010,31(19)

研究饲喂代乳粉和母羊哺乳对羔羊生长性能和体组织参数的影响。选取18只日龄和体重相近、健康的杂交F1羔羊,随机分成试验组和对照组,每组9只。试验组饲喂代乳粉,对照组随母羊哺乳,饲养时间为90d。称取20、90日龄空腹体重,并于90日龄时每组随机选取4只屠宰,称量胴体、各胃室、小肠各段、内脏器官鲜重。结果表明:与对照组相比,试验组羔羊平均日增重提高18.61%(P0.05);宰前活体重、胴体重分别提高22.28%、32.44%(P0.05),屠宰率提高6.67%(P0.05);复胃总重增加13.25%(P0.05),其中瘤胃鲜重增加25.92%(P0.05),皱胃鲜重提高6.74%(P0.05),网胃和瓣胃鲜重则有降低的趋势;回肠鲜重和长度分别增长75.28%(P0.05)和35.50%(P0.05);肺、肾脏、肝脏和脾脏鲜重提高22.29%、30.10%、28.86%和38.22%(P0.05)。结论:饲喂代乳粉后可提高羔羊生长性能,但对屠宰率无显著影响,可促进其瘤胃的发育,并影响部分内脏器官发育。  相似文献   

Associative effects of supplementing rice straw‐based diet with cornstarch on intake,digestion, rumen microbes and growth performance of Huzhou lambs     

Xian‐Dong ZHANG  Jia‐Kun WANG  Wei‐Jian CHEN  Jian‐Xin LIU 《Animal Science Journal》2010,81(2):172-179

Thirty‐six male Hu lambs consuming a rice straw‐based diet were used in a 60‐day trial to study the associative effects of cornstarch supplementation on intake, digestion, ruminal microbial population and growth performance. All animals were fed rice straw ad libitum together with 160 g/day of rapeseed meal and supplemented with cornstarch at levels of 0 (control), 60, 120 or 180 g/day, respectively. Increment of supplementary cornstarch showed little influence on rice straw intake. Optimal growth performance and highest apparent digestibility of organic matter was achieved in the 120 g/day cornstarch group (P < 0.05), while the digestibilities of neutral detergent fiber and crude protein were significantly decreased by 180 g/day cornstarch (P < 0.05). Similar results were observed for carboxymethyl cellulose activity and relative populations of cellulolytic bacteria (Ruminococcus albus, Ruminococcus flavefaciens and Fibrobacter succinogene). Blood urea nitrogen was reduced by supplementary cornstarch, indicating enhanced protein utilization efficiency. Carcass traits were all significantly improved by supplementary cornstarch. These results suggested that proper amounts of starch supplementation (within 0.5% BW) has little adverse effect on forage utilization, but could effectively improve growth performance. High levels of cornstarch, however, would decrease cellulase activity and populations of cellulolytic bacteria, and hence the digestibility of forage.  相似文献   

Measurement of Rumen Digesta Passage Rate and Effective Degradation of Finishing Lambs Feeding the Total Mixed Ration     

GAO Xin-mei  ZHENG Meng  NIU Lu  YIN Hua  CHEN Dao-fu  LIU Chen-li  GAO Wei 《中国畜牧兽医》2017,44(2):456-462

This experiment was amied to measure the rumen digesta passage rate and effective degradation of DM,OM and CP of finishing lambs feeding the total mixed ration (TMR).Three Kazakh wethers with (30.0±3.7)kg body weight and permanent rumen fistula were chosen and the 3×3 Latin square design was adopted.Three kinds of TMR were designed of which the energy level were same and CP levels were 11%,12% and 13%,respectively. Acetic acid ytterbium (Yb-ac) was used as solid phase chyme marker to measure the Yb element decay curve plotted by NLIN regression and figure out its outflow rate (Kp),and calculate the rumen effective degradability rate of TMR.The result showed that the Kp value of three kinds of TMR were 6.71,6.66 and 7.59 %/h,respectively. Under these conditions,the effective degradation rate of DM,OM and CP of TMR1 were 39.82%,38.58% and 43.87%,that of TMR2 were 35.70%,34.40% and 36.86%,while that of TMR3 were 42.46%、41.29% and 51.28%.The average rumen retention time were 26.49,28.98 and 21.73 h,respectively. The results of this study provided some important parameters for further evaluating DM and RUP-AA intestinal digestion of TMR.  相似文献   

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  

贾斌  夏翠梅  代江生  剡根强  徐新文  刘国庆  王东保 《黑龙江畜牧兽医》2003,(11):11-12

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   

Effect of sex and feeding system on feed intake, growth, and meat and carcass characteristics of fattening Assaf lambs   总被引：2，自引：0，他引：2  

A.B. Rodríguez  R. Bodas  N. Prieto  R. Landa  A.R. Mantecn  F.J. Girldez 《Livestock Science》2008,116(1-3):118-125

The effect of feeding system and sex on intake, growth and carcass and meat characteristics of Assaf fattening lambs was studied. Twenty four weaned Assaf lambs, half males and half females were used. After an adaptation period, lambs were randomly assigned to one of the two feeding systems studied. Control lambs received ad libitum commercial concentrate (70% barley, 22% soybean meal, 4.8% wheat, 0.5% bicarbonate, 2.7% mineral–vitamin premix) and barley straw. Free Choice lambs had ad libitum and separate access to whole barley grain and a protein supplement (73.3% soyabean meal, 16% wheat, 1.7% bicarbonate, 9% mineral–vitamin premix). Lambs were slaughtered at 25 kg LBW. Feed intake was not significantly affected by sex (P > 0.05) but Free Choice lambs showed higher dry mater intake than the Control lambs. Nevertheless, only males from the Free Choice group showed an improvement in feed efficiency rate (P < 0.05) and average daily gain (P < 0.01) relating to the Control lambs. Neither feeding system nor feeding system × sex interaction significantly affected non-carcass weight, fat depots, cold carcass weight, dressing percentage, main proportions of commercial cuts and meat characteristics (P < 0.05). As it was expected, female lambs showed a lower average daily gain and a higher feed conversion efficiency than male lambs (P < 0.001) which was related to a greater fat deposition. Meat characteristics were unaffected by sex, with the exception of longissimus lumborum fat content, which was higher in female lambs.The present results suggest that Free Choice feeding system might be suitable for intensively reared male lambs since improvements in daily weight gain and feed conversion rate were achieved, with no adverse effect on carcass and meat quality. Despite the selected diet of both, males and females, did not differ in the crude protein content, the use of Free Choice feeding system for female lambs did not improve performance compared to the Control group.  相似文献   

Comparison of lidocaine,lidocaine–morphine,lidocaine–tramadol or bupivacaine for neural blockade of the brachial plexus in fat‐tailed lambs          下载免费PDF全文

Safoura Ghadirian  Nasser Vesal  Behzad Maghsoudi  Seyed H Akhlagh 《Veterinary anaesthesia and analgesia》2016,43(1):109-116

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羔羊早期断奶技术研究进展     

王燕燕  徐建峰  高博  郭海龙  谢文章  杨有有 《中国草食动物科学》2019,(3):55-57

羔羊早期断奶是利用羔羊代乳料代替母乳,人为缩短母乳哺乳时间。通过实施早期断奶,可促进羔羊生长,提高母羊生产力,获得更高的生产效益。文章就羔羊早期断奶时间、羔羊代乳料的研究现状、早期断奶应注意的问题几方面进行综述,以期为日后羔羊早期断奶技术的研究和生产实践提供参考。  相似文献   

Prevalence,faecal shedding and genetic characterisation of Yersinia spp. in sheep across four states of Australia          下载免费PDF全文

R Yang  U Ryan  G Gardner  I Carmichael  AJD Campbell  C Jacobson 《Australian veterinary journal》2016,94(5):129-137

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