共查询到20条相似文献，搜索用时 62 毫秒
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本试验旨在探究饲粮中添加面包粉对哺乳母猪繁殖性能及断奶仔猪、保育仔猪和生长肥育猪生长性能的影响。试验1：选取体重接近、健康状况良好的待产前1周的“长×大”二元杂交母猪50头，随机分为2组，每组25个重复，每个重复1头母猪。对照组饲喂哺乳母猪饲粮，试验组饲喂用12%的面包粉代替对照组饲粮中部分玉米和豆油的饲粮，饲养试验至仔猪断奶后结束。试验2：选取体重[（7.00±0.71） kg]相近的351头“杜×长×大”断奶仔猪，随机分为3组，每组9个重复，每个重复13头仔猪。对照组饲喂断奶仔猪饲粮，试验组分别饲喂用10%和20%面包粉代替对照组饲粮中部分玉米、豆粕和豆油的饲粮，饲养试验持续10 d。试验3：选取体重[（13.43±0.87） kg]相近的72头“杜×长×大”保育仔猪，随机分为3组，每组4个重复，每个重复6头仔猪。对照组饲喂保育仔猪饲粮，试验组分别饲喂用6%和12%面包粉代替对照组饲粮中部分玉米、豆粕和豆油的饲粮，饲养试验持续30 d。试验4：选取体重[（32.60±0.78） kg]接近的252头“杜×长×大”生长肥育猪，随机分为3组，每组44个重复，每4个重复21头猪。对照组饲... 相似文献
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为研究复合微生态制剂对断奶仔猪生长性能、腹泻率等的影响,试验选取48头杜×长×大断奶仔猪,随机分为2组,对照组饲喂基础日粮,试验组在基础日粮中添加0.1%的复合微生态制剂,每组3个重复,每个重复8头猪。饲养试验为期21 d。试验结果表明：（1）试验组与对照组相比,平均日增重显著提高（P＜0.05）,两组日采食量差异不显著（P＞0.05）。与对照组相比,试验组饲料增重比降低12.35%（P＜0.05）;（2）与对照组相比,添加复合微生态制剂的试验组发病率降低39.53%,腹泻率降低75.34%,均差异极显著（P＜0.01）。由此可见,日粮中添加复合微生态制剂能够减少断奶仔猪的腹泻率,提高其生长性能。 相似文献
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试验选用日龄相近、体重为30kg左右的杜长大三元杂种仔猪120头，研究微生态制剂生态宝对肥育猪干物质表观消化率的影响。试验猪按栏分为3个处理，每个处理设4个重复，每个重复10头猪，试验期14d。对照组饲喂玉米-豆粕型基础饲粮，两个试验组分别在基础饲粮中添加生态宝1kg／t和2kg／t。结果表明，第1周取样时，添加生态宝2kg/组干物质表观消化率比对照组显著提高3．95％，生态宝1kg/t组干物质表观消化率比对照组提高1．64%；第2周添加生态宝1kg／t和2kg／t组干物质表观消化率均显著高于对照组，1kg／t组比对照组显著提高3．81％，2kg／t组比对照组显著提高3．92％，两试验组间差异不显著。结论，生态宝具有提高饲料干物质消化率的作用。 相似文献
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纳米载铜蒙脱石对猪生产性能的影响 总被引：2，自引：1，他引：1
试验探讨纳米载铜蒙脱石对猪不同生长阶段生产性能的影响。取72头健康"杜×大×长"三元杂交断奶仔猪,随机分为3组,每组3个重复,每个重复8头(公母各半)。分别饲喂基础日粮(对照组)、基础日粮+20 mg/kg泰乐菌素+100 mg/kg磺胺二甲基嘧啶(SM2)(试验组Ⅰ)和基础日粮+1 500 mg/kg纳米载铜蒙脱石MMT-Cu(试验组Ⅱ)。比较研究MMT-Cu对仔猪、生长猪及肥育猪各阶段生产性能的影响,以及日粮添加MMT-Cu与抗生素的效果比较。结果表明:与对照组相比,添加MMT-Cu可使仔猪平均日采食量显著提高(P0.05);肥育猪料重比明显降低(P0.01),全程料重比显著下降(P0.01);肥育阶段猪平均日增重较试验组Ⅰ增加(P0.05)。说明纳米载铜蒙脱石对不同生长阶段猪产生的生长效应存在差异,能够明显改善肥育猪料重比。 相似文献
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连云港隆生饲料有限公司生产的“绿益”微生态制剂含有嗜酸乳酸杆菌、双歧杆菌、芽孢杆菌等菌种,具有抗抗生素能力、益生菌浓度高及添加益生元等特点。为研究其饲喂生长肥育猪的效果,在连云港隆生现代化养猪研究所进行了本次试验。试验于2004年6月24日开始,选择60头健康状况良好30kg左右的“长白×太湖”二元去势公仔猪,随机分为两组,每组3个重复,每个重复10头,饲养条件基本一致,基础饲粮相同,湿拌料,自由采食,试验组基础饲粮中每头另添加“绿益”微生态制剂10mg/d。预试10d,进行免疫、驱虫,淘汰与平均个体重相差1.5kg以上的个体,试验组保留… 相似文献
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酶制剂和微生态制剂对断奶仔猪养分利用率和生长性能影响的研究 总被引：1，自引：1，他引：0
试验分为两个部分,旨在研究添加抗生素、酶制剂和微生态制剂对仔猪养分利用率和仔猪生长性能的影响。饲养实验:选用体重基本一致的28日龄商品断奶仔猪320头,试验分为4个处理,每个处理4个重复,处理1为对照组(无抗生素、酶制剂、微生态制),处理23、、4分别在处理1的基础上添加抗生素(喹乙醇)100 mg/kg、酶制剂350 mg/kg、微生态制剂1 000 mg/kg。试验期35 d。消化试验:选用55日龄仔猪16头,随机分为4个处理,每个处理4个重复,试验采用全收粪法,日粮和设计同饲养试验。试验结果表明,酶制剂和微生态制剂与对照组相比显著地提高了仔猪蛋白表观消化率(P<0.05),与抗生素组相比差异不显著(P>0.05)。酶制剂试验组与其他各组相比,显著提高了仔猪中性洗涤纤维的表观消化率(P<0.05)。酶制剂和微生态制剂对仔猪总能和干物质的表观消化率没有显著影响(P>0.05)。酶制剂试验组和抗生素组与微生态制剂组和对照组相比显著提高了仔猪平均日增重(P<0.05),而微生态制剂组与对照组相比差异不显著(P>0.05)。微生态和酶制剂组与抗生素和对照组相比显著降低了料重比(P<0.05)。酶制剂、微生态制剂和抗生素试验组对仔猪的平均日采食量没有产生显著的作用(P>0.05),但显著降低了仔猪腹泻率(P<0.05)。酶制剂和微生态制剂可以提高仔猪养分表观消化率和生产性能。从对仔猪生产性能和养分表观消化率影响上看,酶制剂和微生态制剂可以代替抗生素应用在仔猪生产中。 相似文献
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《养猪》2016,(1)
研究旨在探讨无抗饲粮中添加微生态制剂对肥育猪生长性能、养分消化率和血清生化指标的影响。试验选用60头60 kg左右的杜长大肥育猪,随机分成2组,每组3个重复栏,每栏10头。对照组饲喂无抗基础饲粮,试验组饲喂添加600 mg/kg微生态制剂的饲粮,试验期42 d。结果显示,与对照组相比,微生态制剂组日增重增加7.46%(P0.05),日采食量和料重比差异不显著(P0.05);饲粮中粗蛋白质、粗脂肪、粗灰分和钙的表观消化率分别提高16.26%(P0.01)、9.28%(P0.05)、29.87%(P0.05)和10.19%(P0.05);血清碱性磷酸酶含量提高50.24%(P0.05)。由此可见,肥育猪饲粮中添加600 mg/kg微生态制剂可促进猪肠道对饲粮养分的消化吸收,改善机体代谢状态,促进猪生长。 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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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
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Billinghurst RC Brama PA van Weeren PR Knowlton MS McIlwraith CW 《American journal of veterinary research》2004,65(2):143-150
OBJECTIVE: To determine whether serum concentrations of biomarkers of skeletal metabolism can, in conjunction with radiographic evaluation, indicate severity of osteochondrosis in developing horses. ANIMALS: 43 Dutch Warmblood foals with varying severity of osteochondrosis. PROCEDURE: 24 foals were monitored for 5 months and 19 foals were monitored for 11 months. Monthly radiographs of femoropatellar-femorotibial and tibio-tarsal joints were graded for osteochondral abnormalities. Serial blood samples were assayed for 8 cartilage and bone biomarkers. At the end of the monitoring period, foals were examined for macroscopic osteochondrosis lesions. RESULTS: Temporal relationships were evident between certain serum biomarkers and osteochondrosis severity in foals during their first year. Biomarkers of collagen degradation (collagenase-generated neoepitopes of type-II collagen fragments, type-I and -II collagen fragments [COL2-3/4C(short)], and cross-linked telopeptide fragments of type-I collagen) and bone mineralization (osteocalcin) were positive indicators of osteochondrosis severity at 5 months of age. In foals with lesions at 11 months of age, osteochondrosis severity correlated negatively with COL2-3/4C(short) and osteocalcin and positively with C-propeptide of type-II procollagen (CPII), a collagen synthesis marker. Radiographic grading of osteochondrosis lesions significantly correlated with macroscopic osteochondrosis severity score at both ages and was strongest when combined with osteocalcin at 5 months and CPII at 11 months. CONCLUSIONS AND CLINICAL RELEVANCE: The ability of serum biomarkers to indicate osteochondrosis severity appears to depend on stage of disease and is strengthened with radiography. In older foals with more permanent lesions, osteochondrosis severity is significantly related to biomarker concentrations of decreased bone formation and increased cartilage synthesis. 相似文献