共查询到20条相似文献,搜索用时 56 毫秒
1.
选择48头长荣杂交断奶仔猪(起始重7kg左右),随机分为6个组,每组8头,两个重复,研究4个不同芽孢杆菌组合(在乳酸菌和酵母菌的基础方上分别加入凝结芽孢杆菌、枯草芽孢杆菌、地衣芽孢杆菌、蜡样芽孢杆菌)和抗生素组对断奶仔猪生产性能及腹泻率的影响。结果表明:平均日增重(ADG)芽孢杆菌各组高于对照组;较之对照组,腊样芽孢杆菌组在前、后及全期ADG分别显著提高45.7%(P<0.01)、14.74%和23.92%(P<0.05);料重比(F/G)分别降低18.8%(P<0.05),4.3%和7.2%(P>0.05);腹泻率(DR)降低79.97%;表明复合蜡样芽孢杆菌制剂优于其它芽孢杆菌组合,且具有与抗生素组相类似的抗病与促生长作用。为开发无公害猪用微生物饲料添加剂奠定了基础。 相似文献
2.
不同芽孢杆菌组合对仔猪生产性能的影响 总被引:4,自引:0,他引:4
选择48头长荣杂交断奶仔猪(起始重7kg左右),随机分为6个组,每组8头,两个重复,研究4个不同芽孢杆菌组合(在乳酸菌和酵母菌的基础方上分别加入凝结芽孢杆菌、枯草芽孢杆菌、地衣芽孢杆菌、蜡样芽孢杆菌)和抗生素组对断奶仔猪生产性能及腹泻率的影响。结果表明:平均日增重(ADG)芽孢杆菌各组高于对照组;较之对照组,腊样芽孢杆菌组在前、后及全期ADG分别显著提高45.7%(P〈0.01)、14.74%和23.92%(P〈0.05):料重比(F/G)分别降低18.8%(P〈0.05),4.3%和7.2%(P〉0.05):腹泻率(DR)降低79.97%;表明复合蜡样芽孢杆菌制剂优于其它芽孢杆菌组合,且具有与抗生素组相类似的抗病与促生长作用。为开发无公害猪用微生物饲料添加剂奠定了基础。 相似文献
3.
试验旨在研究枯草芽孢杆菌与中药提取物联用对断奶仔猪生长性能和抗腹泻性能的影响。试验选用200头初始体质量约9 kg的30 d断奶仔猪,随机分为2个组(公母各半),每组5个重复,每重复10头。1组为试验组(在基础日粮基础上按照1 000 g/t的剂量添加枯草芽孢杆菌与中药提取物);2组为对照组(在基础日粮基础上按照500 g/t的剂量添加金霉素)。试验期28 d。结果表明:试验组断奶仔猪的增重率显著高于对照组(P0.05),增加6.52%,说明枯草芽孢杆菌与中药提取物可以提高乳仔猪的生长性能;试验组断奶仔猪的采食量比对照组增加5.71%,差异显著(P0.05),说明枯草芽孢杆菌与中药提取物适口性较优;试验组断奶仔猪的料肉比比对照组下降8.48%,差异不显著(P0.05),说明枯草芽孢杆菌与中药提取物可以提高乳仔猪的生长性能。试验组断奶仔猪的腹泻指数和腹泻率分别比对照组降低28.57%、25.00%,差异显著(P0.05),说明枯草芽孢杆菌与中药提取物在控制断奶仔猪腹泻方面效果显著优于金霉素。综上可得,枯草芽孢杆菌与中药提取物可作为饲料添加剂替代抗生素,可改善断奶仔猪的生长性能并降低腹泻率。 相似文献
4.
不同芽孢杆菌对断奶仔猪生产性能的影响 总被引:4,自引:1,他引:3
选择8 kg左右断奶仔猪150头,随机分为5组,每组30头,进行为期52 d的饲养试验,研究基础日粮中分别添加0.05%、0.1%的枯草芽孢杆菌和凝结芽孢杆菌对断奶仔猪生产性能的影响。试验结果表明:在基础日粮中添加0.05%芽孢杆菌试验效果比添加0.1%芽孢杆菌试验效果好。与对照组相比,在日粮中添加0.05%枯草芽孢杆菌组和0.05%凝结芽孢杆菌,日增重明显高于空白对照组(P<0.05),饲料转化率比对照组提高5.48%(P<0.05)和8.96%(P<0.05);腹泻率显著降低(P<0.05);与对照组相比,添加枯草芽孢杆菌和凝结芽孢杆菌,粪便中乳酸菌和双歧杆菌明显增加(P<0.05),大肠杆菌明显降低(P<0.05)。与对照组相比,添加0.05%枯草芽孢杆菌比对照组多收入49.57元/头,添加0.05%凝结芽孢杆菌比对照组多收入47.15元/头。 相似文献
5.
为研究地衣芽孢杆菌和低聚木糖对断奶仔猪生长性能、肠道形态和通透性及粪便微生物的影响,试验采用体重、健康状况相近的(25±1)日龄断奶仔猪160头,随机分为4组(对照组、400mg/kg地衣芽孢杆菌组、200mg/kg低聚木糖组和地衣芽孢杆菌+低聚木糖组),每组5个重复,每个重复8头仔猪。结果表明:(1)地衣芽孢杆菌组和低聚木糖组断奶仔猪的平均日增重显著提高15.1%和12.8%(P<0.05),腹泻率显著降低34.1%和41.2%(P<0.05);地衣芽孢杆菌组断奶仔猪的料肉比显著降低10.6%(P<0.05);(2)地衣芽孢杆菌组和低聚木糖组断奶仔猪空肠的绒毛高度显著提高20.3%和16.3%(P<0.05),绒隐比显著提高31.5%和20.7%;(3)地衣芽孢杆菌组断奶仔猪血清D-乳酸和二胺氧化酶(DAO)水平显著降低14.6%和19.1%(P<0.05);(4)低聚木糖组断奶仔猪粪便乳杆菌数量显著提高5.3%(P<0.05);地衣芽孢杆菌组和低聚木糖组断奶仔猪粪便大肠杆菌数量显著降低12.5%和9.4%(P<0.05),并且两者有显著的互作效应(P<0.05)。因此,断奶仔猪日粮中添加地衣芽孢杆菌和低聚木糖可以改善仔猪的生长性能,降低腹泻率,改善肠道绒毛结构和屏障功能,促进肠道微生物平衡。 相似文献
6.
低聚果糖、芽孢杆菌制剂对断奶仔猪生长性能及免疫功能的影响 总被引:1,自引:0,他引:1
研究在28日龄断奶仔猪日粮中添加芽孢杆菌、低聚果糖制剂对其生长性能及血清IgA、IgG、CD4、CD8、猪瘟抗体水平等指标的影响。选择28日龄断奶仔猪(杜×长×大)80 头,分4组,每组4个重复,每重复5头猪,进行为期28 d的饲养试验;处理组分别饲喂基础日粮、基础日粮+0.1%芽孢杆菌制剂、基础日粮+0.4%低聚果糖和基础日粮+0.1%芽孢杆菌制剂+0.4%低聚果糖制剂。结果表明,低聚果糖、芽孢杆菌制剂均能显著提高断奶仔猪日增重、饲料转化率和降低腹泻率(P<0.05);低聚果糖、芽孢杆菌制剂能显著提高断奶仔猪猪瘟抗体水平、血清IgA、IgG水平(P<0.05),但对CD4、CD8指标影响不大。 相似文献
7.
为了研究日粮中添加凝结芽孢杆菌对仔猪生长性能、肠道菌群和血液生化指标的影响,试验选取21日龄健康断奶仔猪30头,随机分为3组(对照组、试验Ⅰ组、试验Ⅱ组),对照组饲喂基础日粮,试验Ⅰ组、试验Ⅱ组分别在基础日粮中添加凝结芽孢杆菌2.0×106cfu/g、2.0×107cfu/g。预试期3 d,正试期21 d。于试验第21天采血,屠宰,测定其生长性能、肠道菌群和血液生化指标。结果表明:日粮中添加不同水平的凝结芽孢杆菌均显著降低了断奶仔猪的腹泻率(P0.05);提高了仔猪回肠内容物中乳酸菌的数量(P0.05),降低了回肠内容物中梭菌的数量(P0.05);提高了血浆中磷酸丝氨酸、胱氨酸、酪氨酸等多种氨基酸的含量(P0.05),降低了磷酰乙醇铵的含量(P0.05)。说明在日粮中添加凝结芽孢杆菌可以改善断奶仔猪的肠道菌群,降低仔猪的腹泻率。 相似文献
8.
选用24~26日龄"长×大"二元杂交断奶仔猪96头(平均体重6.84 kg±0.16 kg),研究不同形式氧化锌对断奶仔猪生长性能和腹泻的影响。试验仔猪按完全随机区组设计分为4组,每组3个重复,每个重复8头仔猪。对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加2800 g/t普通氧化锌、800 g/t包膜氧化锌、500 g/t纳米氧化锌,试验期14 d。结果表明,与对照组相比,试验1、2、3组断奶仔猪平均日增重分别提高了15.26%(P<0.05)、9.88%(P<0.05)和14.69%(P<0.05),料重比降低了9.59%(P<0.05)、7.53%(P<0.05)和10.27%(P<0.05);腹泻率降低了66.67%(P<0.05)、55.55%(P<0.05)和55.55%(P<0.05)。试验1、2、3组之间断奶仔猪的平均日增重、料重比及腹泻率均无显著差异(P>0.05),说明包膜氧化锌和纳米氧化锌是一种代替高剂量普通氧化锌的可行选择。 相似文献
9.
选择2~8胎、健康的妊娠30 d长大母猪60头,按随机区组分为2组,每组30头。试验从母猪妊娠30 d开始至哺乳仔猪28 d断奶结束。对照组饲喂基础饲粮,试验组妊娠母猪、哺乳母猪饲喂基础饲粮+0.1%枯草芽孢杆菌制剂。结果表明,妊娠母猪总产仔数、产活仔数、初生窝重、初生个体重分别较对照组提高13.47%、8.83%、9.66%、0.61%(P>0.05);28日龄断奶窝重、断奶个体重、断奶仔猪日增重、断奶成活率分别较对照组提高13.93%、6.54%、10.62%、1.74%(P>0.05),仔猪腹泻率降低45.94%(P<0.05)。妊娠期母猪日均采食量增加6.40%(P>0.05),日均粪便重量减少8.43%(P<0.05),粪便pH降低5.56%(P>0.05);哺乳期母猪日均采食量提高5.23%(P>0.05),日均粪便重量减少11.84%(P<0.05),粪便pH降低6.77%(P>0.05)。该试验表明,枯草芽孢杆菌制剂可提高母猪生产力水平、饲料转化率及哺乳仔猪健康。 相似文献
10.
文章旨在评价丁酸梭菌和地衣芽孢杆菌对断奶仔猪生长性能及血液指标的影响。试验选择21日龄断奶仔猪100头,随机分为4组,预饲期5 d。之后,试验1、2组按照4.0×108 CFU/kg的剂量分别在对照组饲粮的基础上添加丁酸梭菌和地衣芽孢杆菌,试验3组饲粮中添加4.0×108 CFU/kg的丁酸梭菌+4.0×108 CFU/kg的地衣芽孢杆菌,试验为期30 d。试验结果 :试验2、3组仔猪末重较对照组分别提高5.9%、7.1%(P 0.05),ADG分别提高12.6%、15.4%(P 0.05),试验1组仔猪平均末重、ADG较对照组分别提高2.9%、5.8%,但未达显著水平(P 0.05),试验3组ADG较试验1组提高9.0%(P 0.05)。试验组FCR较对照组分别降低6.1%、8.3%、9.9%(P 0.05)。试验1、2、3组仔猪血清中SOD较对照组分别提高8.9%、15.2%、17.1%(P 0.05),MDA浓度较对照组降低7.6%、8.7%、10.6%(P 0.05);试验1、2组仔猪血清中T-AOC、GSH-Px浓度较对照组均有上升,但不显著(P 0.05);试验3组T-AOC、GSH-Px浓度较对照组均提高8.9%(P 0.05)。试验组仔猪血清中球蛋白浓度较对照组分别提高10.9%、12.9%、16.3%(P 0.05),白蛋白/球蛋白分别降低9.1%、12.9%、16.3%(P 0.05)。此外,试验组仔猪血清中免疫因子浓度较对照组升高,试验2、3组IgG浓度分别提高8.7%、12.2%(P 0.05),IgA浓度提高7.3%、11.4%(P 0.05)。综上所述,饲粮中添加丁酸梭菌和地衣芽孢杆菌均能促进仔猪生长,提高其免疫功能,两者同时添加效果最好。 相似文献
11.
12.
13.
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
14.
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
15.
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
16.
17.
18.
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
19.
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