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1.
复合酶制剂对生长肥育猪的饲喂效果   总被引:4,自引:0,他引:4  
选用体重27kg的杜长大三元杂交生长肥育猪42头,随机分成对照组和试验组,每组3个重复组,对照组饲喂基础日粮,试验组饲喂基础日粮+0.01%复合酶制剂,试验期32d。试验结果表明:复合酶制剂可将猪平均日增重提高0.057kg(P<0.05);平均日采食量降低0.072kg,饲料增重比降低13.31%;每千克增重饲料成本降低0.605元,经济效益提高了12.62%。  相似文献   

2.
选用体重27 kg的杜长大三元杂交生长肥育猪42头,随机分成对照组和试验组,每组3个重复组,对照组饲喂基础日粮,试验组饲喂基础日粮+0.01%复合酶制剂,试验期32 d.试验结果表明复合酶制剂可将猪平均日增重提高0.057 kg(P<0.05);平均日采食量降低0.072 kg,饲料增重比降低13.31%;每千克增重饲料成本降低0.605元,经济效益提高了12.62%.  相似文献   

3.
赵必迁 《养猪》2014,(5):9-10
为研究生猪肥育期饲喂鲜绿菊苣对生长性能影响,采用单因子试验设计,选取160头平均体重(60.9±1.65) kg杜长大肥育猪,随机分为4个试验组,各试验组8个重复,每个重复5头猪。肥育期基础饲粮按60-90 kg阶段营养需要配制。对照组饲喂肥育期基础饲粮;10%菊苣组采取90%基础饲粮+10%菊苣(按风干量计)饲喂方式;15%菊苣组采取85%基础饲粮+15%菊苣(按风干量计)饲喂方式;20%菊苣组采取80%基础饲粮+20%菊苣(按风干量计)饲喂方式。结果显示,生猪肥育期平均日增重、平均日采食量和料重比,10%菊苣组与对照组(基础饲粮)相比差异不显著(P〈0.05)。15%菊苣组和20%菊苣组平均日增重、平均日采食量和料重比与对照组相比差异达到显著或极显著水平,平均日采食量分别降低2.97%(P〈0.05)和7.18%(P〈0.01),料重比分别提高2.13%(P〈0.05)和3.34%(P〈0.05),平均日增重分别降低4.99%(P〈0.05)和10.20%(P〈0.01)。随着菊苣替代比例增加,饲粮单价逐渐降低,增重饲料成本也降低,在不降低生长性能情况下,10%菊苣组综合经济效益最佳。综合考虑,肥育猪饲喂鲜绿菊苣替代基础饲粮比例达到10%(按风干量计),在降低饲料成本情况下,生长性能最佳,综合经济效益最好。  相似文献   

4.
《养猪》2020,(5)
试验旨在研究甜味剂—蔗糖对肥育猪生长性能(日采食量、日增重、料重比)和经济效益的影响。试验选择100头体重73.0 kg左右的健康杜长大三元杂种肥育猪,随机分为试验组和对照组,每组5个重复,每个重复10头猪(公母各半)。对照组饲喂基础饲粮,试验组在对照组饲粮基础上添加蔗糖1%,对照组和试验组饲粮营养水平一致。试验期23 d。试验结果表明:1)生长性能:对照组与试验组生长性能无显著差异(P0.05)。与对照组相比,试验组日采食量、日增重均有一定程度的提高;试验组料重比降低。2)经济效益:肥育猪增重饲料成本,试验组(6.89元/kg)低于对照组(6.99元/kg)。综上所述,在炎热的季节,肥育猪饲粮中添加蔗糖,可提高猪只采食量,改善其生长性能,并获得较好的经济效益。  相似文献   

5.
选取 40头 30 kg左右健康无病的杜×长×大三元杂交生长猪 ,随机分为 2组 ,两组基础日粮一致 ,试验组日粮中添加 1 %产酶益生素。试验期63d,结果表明 ,试验组比对照组日增重降低 4.1 8%( P>0 .0 5 ) ,耗料增重比上升 7.0 3% ,头均毛利减少1 9.37元 ,说明在本试验中益生素对育肥猪不但没有促生长作用 ,相反还有一定的负面效应。  相似文献   

6.
丁丽  孙波 《当代畜牧》2005,(2):43-44
在农户舍饲和基础日粮不变的条件下,用绿肥草粉取代日粮中50%玉米,饲喂苏&#215;本F1代杂交双月断奶仔猪至出栏,探讨开发利用绿肥草粉养猪的可行性。结果表明:试验组与对照组相比,平均日增重提高231.71g(+54.80%),料肉比降低1.39(-35、55%),单位增重耗料成本降低1.76元(-35.48%),全期试验组头均增加盈利171.00元。表明用50%绿肥草粉替代日粮中玉米饲喂生长肥育猪完全可行。  相似文献   

7.
选择健康的(杜×长×大)三元杂交育肥猪30头,体重58kg左右,随机分为3组。对照组饲喂基础日粮,试验1组为基础日粮+130mg/kg半胱胺,试验2组为基础日粮+200mg/kg半胱胺。结果表明,试验1组和2组与对照组相比,平均日增重分别提高7.13%和7.74%(P<0.05),差异显著;料重比分别下降2.11%和2.41%(P<0.05),差异显著;毛利收入增加6.66%和5.4%。试验1组和试验2组相比,试验2组日增重提高0.57%,料重比下降0.31%,但差异不显著(P>0.05);而经济收入减少1.16%。说明,在育肥猪饲粮中添加130mg/kg和200mg/kg的半胱胺,均可显著提高育肥猪的日增重和饲料转化率,增加经济收入。而以添加130mg/kg半胱胺的综合效果较好。  相似文献   

8.
日粮添加可直接饲喂微生物对生长肥育猪生产性能的影响   总被引:2,自引:0,他引:2  
试验选用 12 0头 80日龄 ,体重约 2 5kg的三元杂交 (杜×长×大 )商品代瘦肉型生长肥育猪 ,随机分为 2组 ,分别设为对照组和试验组 ,每组两个重复 ,每个重复 30头猪 ,对照组饲喂基础日粮 ,试验组饲料在对照组日粮基础上添加可直接饲喂微生物。经过 31d的饲养试验 ,结果表明 :①试验组猪只的日增重比对照组提高 6 .0 7% (P <0 .0 5 ) ,料肉比比对照组提高 3.2 8% (P >0 .0 5 ) ;②经济效益 ,试验组猪只提高了 8.11% ;③试验组猪只的腹泻率较对照组降低 5 .6 7%。  相似文献   

9.
半胱胺对肥育猪生产性能和胴体的影响   总被引:8,自引:0,他引:8  
选择体重60kg左右的杜长大杂交猪144头,随机分成4组,分别在基础日粮中添加半胱胺0、100、150和350mg/kg。试验结果:日粮中添加100、150mg/kg半胱胺使试验猪体重增加5.6%和12.7%,而添加350mg/kg半胱胺却使增重降低了11.4%;与对照组相比,添加100、150和350mg/kg半胱胺耗料增重比分别降低了6.5%、12.1%和-10.2%;添加100、150mg/kg半胱胺使每头猪增加收入5.35元和12.61元,而添加350mg/kg时,减少收入30.89元;试验结果表明,在肥育猪日粮中添加100和150mg/kg半胱胺能明显提高猪的生产性能,而添加过量的半胱胺却反而降低了猪的生产性能。  相似文献   

10.
本研究旨在探讨不同发酵豆粕以及添加不同比例发酵豆粕代替鱼粉在仔猪教槽料中使用对仔猪生长性能和健康状况的影响。选择出生日相近、体重接近(9.5 ± 0.1kg)的商品代断奶仔猪192头,随机分作4个处理组,分别为对照组:饲喂基础日粮+5%普通发酵豆粕;试验1组:饲喂基础日粮+5%益生菌发酵豆粕;试验2组:饲喂基础日粮(无鱼粉)+9.3%益生菌发酵豆粕;试验3组:饲喂基础日粮(无抗生素)+9.3%益生菌发酵豆粕。测定不同处理组断奶仔猪的腹泻情况,增重情况,日采食情况,耗料增重比以及脏器系数进行测定。结果显示:试验1组仔猪总增重及日增重均显著高于对照组及其他各组(P0.05),仔猪平均日采食量极显著高于试验3组(P0.01),试验1组仔猪耗料增重比最低,差异显著(P0.05),但试验2组仔猪腹泻率较对照组及其他各组显著升高(P0.05),各试验组与对照组相比脏器系数差异不显著(P 0.05)。综合生产性能及健康状况而言,试验1组的饲喂效果最佳。  相似文献   

11.
12.
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   

13.
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.
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   

15.
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   

16.
用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10~0.82μg/g。表明:蜂蜜应视为天然富硒营养品。  相似文献   

17.
为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …  相似文献   

18.
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   

19.
乳酸杆菌益生作用机制的研究进展   总被引:2,自引:0,他引:2  
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   

20.
Fractures of the anconeal process of 5 pigs ranging in age from 4 to 8 months were studied radiographically and histologically. Clinically, animals with a fracture of the anconeal process had a "tight," restricted gait. In pigs at 4.5 months of age, a radiolucent line through the base of the anconeal process was composed of fibrocartilage, fibrous connective tissue, and hyaline cartilage. Subperiosteal proliferation of woven bone was located along the cranial surface of the olecranon, adjacent to the base of the anconeal process. In older animals, the radiolucent line through the anconeal process contained variable amounts of fibrous connective tissue and fibrocartilage. The proliferation of subperiosteal bone at the base of the anconeal process formed a "buttress callus" which retained a radiolucent area between the callus and the proximal surface of the anconeal process. The latter region of radiolucency was continuous with the transversely oriented line that traversed the base of the anconeal process.  相似文献   

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