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仔兔从18～20日龄采取随笼补饲和离笼补饲两种方法。两批试验结果表明:随笼补饲的仔兔断奶窝重、窝日增重及成活率均明显高于离笼补饲的仔兔,重要的是随笼补饲极大简化了烦琐操作程序,减少了工作量,更适合规模化养兔场应用。 相似文献
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随着肉兔规模化生产的发展,对仔兔补饲技术也提出了新的要求,不仅要研究补饲饲料原料、营养和料型,还要改进补饲方法,否则难以适应规模化肉兔生产发展的需要.为此,笔者进行了仔兔的离笼补饲和随笼补饲方法的比较试验. 相似文献
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为了确定不同料型对仔兔发育的影响及其经济效益.我们于1989年6月在定西县种兔场进行了仔兔饲喂粉料和颗粒料的对比试验.选择21日龄发育正常、体重接近的青紫蓝仔兔10窝(63只).随机分为2组,每组各5窝.母仔分笼饲养,每天早晨定时哺乳1次.从21日龄开始补饲,至35日龄断奶.1组(粉料组)33只仔兔饲喂湿拌粉料,组成为(%):玉米16.l,麸皮20.0,豌豆2.2,胡麻饼10.0,苜蓿草粉51.1,食盐0.5.2组(颗粒组)30只仔兔喂给与1组成分相同的颗粒饲料.两 相似文献
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笔者根据近几年的生产实践,依据仔兔的生长发育和母兔的泌乳规律,以及母兔泌乳与仔兔增重的关系,提出对仔兔提早补饲的管理手段,以提高仔兔的成活率和断奶窝重,缩短育肥周期,加快商品生产. 相似文献
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1做好补饲工作
在仔兔哺乳期间，从20天左右开食起在继续哺乳的同时，喂给适量的混合精料，称为仔兔补饲。随着仔兔日龄增长，体重增加，采食量也随之增加，仅靠母兔乳汁已远不能满足仔兔生长发育的需要。特别是20日龄后，母兔泌乳量很快降低，这就不能满足仔兔营养的需要。补饲对仔兔有许多好处。首先，补饲有利于仔兔过好断奶关。仔兔断奶后，如果不及时补饲，会出现营养不良而掉奶瞟，还可能引发传染性口腔炎而造成死亡。 相似文献
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本试验旨在研究饲粮中添加酸化剂和血浆蛋白粉对哺乳仔兔生长性能、胃肠道pH、胃蛋白酶活性及肠黏膜形态的影响。试验选取同期配种和产仔的新西兰经产母兔120窝,随机分为4组,每组5个重复,每个重复6窝,分别饲喂基础饲粮(A组,对照组)、基础饲粮+0.1%酸化剂(B组)、基础饲粮+0.3%血浆蛋白粉(C组)、基础饲粮+0.1%酸化剂+0.3%血浆蛋白粉(D组)。哺乳仔兔在18日龄开始补饲,饲养试验持续到35日龄断奶。结果表明:与对照组相比,C、D组28、35日龄仔兔的个体均重显著提高(P0.05),分别提高了10.53%、11.70%和16.07%、18.66%;B、D组28、35日龄仔兔的胃和十二指肠pH显著降低(P0.05);D组28、35日龄仔兔的胃蛋白酶活性显著提高(P0.05),B组35日龄仔兔胃蛋白酶的活性也显著提高(P0.05);C、D组28、35日龄仔兔的十二指肠、空肠和回肠的绒毛高度显著增加(P0.05),隐窝深度显著降低(P0.05)。综上所述,饲粮中添加0.1%酸化剂或0.3%血浆蛋白粉均能改善哺乳仔兔的生长性能,且酸化剂和血浆蛋白粉同时添加效果更佳。 相似文献
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杨晓华 《河南畜牧兽医(综合版)》2005,26(2):12-12
为了进一步适应国内外市场对兔肉的需求和肉兔规模化生产发展的需要,目前改进仔兔的补饲技术显得尤为重要。不仅要对补饲的饲料营养、料型加以研究,同时对仔兔的补饲方法也必须进行改进,否则,难以更好地适应肉兔规模化生产的发展需要。鉴于目前在养兔生产上对仔、母分离补饲与不分离补饲两种仔兔补饲方法效果尚未有详细对比资料,为了进一步验证对比两种补饲方法的效果,笔者于2004年3～4月间,特对仔兔的两种补饲饲料的方法进行了效果对比试验,并取得了一定结果,现报告如下。1材料与方法1.1试验动物及场所该试验选择本市水寨镇养兔专业户饲养… 相似文献
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仔兔、幼兔死亡有3个高峰期。一是产后7天以内,这个时期仔兔还没有睁眼,全靠母兔喂养维持生命,如果母兔患有乳房炎、隐性乳房炎或母兔笼底不洁,乳头被污物污染,仔兔吃到这种母兔的乳汁,就会发生仔兔肠炎,死亡率很高。二是在仔兔18日龄补饲后的7天以内,这时的仔兔由原来全部吃奶转变为吃奶和吃饲料并行, 相似文献
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<正> 本文根据近几年的生产实践,依据仔兔生长发育和母兔的泌乳规律,以及母兔泌乳与仔兔增重的关系,提出对仔兔提早补饲的管理手段,以提高仔兔的成活率和断奶窝重,缩短育肥周期,加快商品生产。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献