蚯蚓粉对肉兔生产性能的影响

选取40日龄体重接近的断奶新西兰白兔80只，随机分成2组，在基础日粮和营养水平相同的情况下，试验组添加2％的蚯蚓粉。结果表明，试验组平均日增重提高18％，料重比下降11．64％。     

丰本生力酵素饲喂肉猪试验研究

选用60日龄杜洛克、长白仔猪，Ⅰ组为试验组，Ⅱ组为对照组。对照组饲养基础日粮，试验组在对照组的基础上添加1％的丰本生力酵素。结果表明：平均日增重试验组均高于对照组，其增长幅度杜洛克为13．1％，长白猪为8．12％。饲料转化率差异不显著，但瘦肉率试验组比对照组提高了13．1％。经济效益明显提高，杜洛克试验组比对照组提高了4．8％，长白猪试验组比对照组提高了5．3％。     

脂肪酸钙对肉兔生产性能的影响

选取40日龄体重较为一致的断奶仔兔40只，随机分成两组，在基础日粮和营养水平相同的情况下，试验组添加3％的脂肪酸钙。结果表明，试验组平均日增重比对照组提高25％，平均日耗料降低2g，料肉比下降27．2％。     

蚯蚓粉对肉兔生产性能的影响

选取40日龄体重较为一致的断奶仔兔80只，随机分成2组，在基础日粮和营养水平相同的情况下，试验组添加2％的蚯蚓粉，结果表明，试验组平均日增重提高18％，料肉比下降12．3％。     

日粮添加"育生健"对提高母猪生产性能的作用

为探讨“育生健”对母猪生产性能及其经济效益的影响，试验选用80头怀孕100天左右的长大二元初产母猪，随机分成2组(试验组、对照组)。各组母猪基础日粮和乳猪教槽饲料均相同。结果表明在日粮中按0．1％比例添加“育生健”的试验组，其产活仔数、断奶仔猪成活率、哺乳仔猪平均日增重分别比对照组提高8．57％、2．91％和2．93％：而母猪产死胎数，试验组对照组降低了37．5％。在日粮中添加0．1％的“育生健”，虽然试验组的基础日粮成本比对照组提高2．37％，但提供断奶仔猪数比对照组多41头，其产值比对照组提高11．68％。     

应用天然植物提取物饲料添加剂生产绿色风味猪肉

以长大二元生长公猪为研究对象，研究天然植物提取物对育肥猪增重和屠宰效果，生产绿色风味猪肉。实验设试验组和对照组，试验组猪日粮中添加1％的TF200．对照组不添加。实验结果表明，试验组平均日增重、日耗科量高于对照组，提高率分别为5．92％和2．97％，料肉比比对照组降低了2．76％。试验组的屠宰率、后腿比例、瘦肉率、眼肌面积、熟肉率分别比对照组提高了0．94％，4．44％，7．67％，13．81％，0．63％；试验组的平均膘厚、脂肪比例、板油比例、平均皮厚，失水率分别比对照组降低了1．31％，20.20％，11．13%，19.35％，6．55％。试验组的猪肉大理石花纹明显，肉质嫩度良好．无药残，符合绿色风味标准。     

炎热季节蛋鸡口粮中添加蛋氨酸锌对产蛋性能的影响

目的：为探讨蛋氨酸锌在炎热季节对鸡产蛋性能的影响。方法：试验组和对照组各300只鸡，作对比试验试验组日粮中添加200mg蛋氨酸锌。结果：产蛋率试验组比对照组高6．3％，料蛋比试验组和对照组分别为2．37：和2．46：1，试验组提高饲料报酬3．7％。经济效益：试验组比对照组每只鸡多收入0．28元。     

提高猪采食量的综合应用技术研究

本文通过在仔猪、育肥猪日粮中添加强化料“速长X”观察其对猪各种生产性能的影响，结果表明仔猪阶段试验组日增重分别比对照组提高了14．6％、11．0％、13．1％，肥育猪阶段试验组日增重比对照组提高了8．6％．仔猪阶段试验组采食量分别比对照组提高了6．7%、2．8%、2．5％，肥育猪阶段试验组采食量比对照组提高了2．3名，仔猪阶段试验组饲料利用率分别比对照组降低了7．4％、8．0％、9．3％，肥育阶段试验组饲料利用率比对照组降低了5．6％，仔猪阶段试验组的发病率明显低于对照组，可见强化料“速长X”还可以提高仔猪的免疫力。母猪饲料中添加强化料“速长X”后，母猪的采食量相对于对照组提高13．5％。由于母猪的采食量增加，营养摄入增多，泌乳量增加，带动仔猪的日增重增加，试验组的仔猪平均多增重16．3％。试验结果显示该技术对提高猪采食量具有显著的效果。     

全早稻型配合日粮对杜大长肉猪增重效果的研究

２４头３８kg左右的杜大长杂交猪，随机分为两组，试验组锔喂早稻谷（前期４０％，后期５０％）－全早稻型配合日粮，对照组饲喂玉米豆粕型日粮，试验５６d结束，日增重试验组与对照组分别为０．６９１kg和０．５７９kg,差异极显著（Ｐ＜０．０１），料重比分别为３．０６和３．１７，试验组降低３．５％，每kg增重饲料成本分别为４．４１元和４．８４元，试验组减少８．９％。     

仔猪21日龄断奶试验初报

文章对21日龄仔断奶及相关技术进行研究，设28日龄仔猪断奶作对照试验。结果表明：仔猪63日龄平均体重，试验组19．43千克，显著高于对照组的17．69千克（P＜0．01）；保育期日增重，试验组322．1克，显著高于对照组的299．8克（P＜0．05）。保育期饲料转化率，试验组1．53，显著优于对照组的1．65（P＜0．01）；试验期间腹泻率，试验组2．4％，对照组5．33％，两者差异极显著（P＜0．01），断奶后母猪发情间隔，试验组5．48天，对照组5．12天，二者差异不显著（P．05）；受胎率基本一致。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

商会自治的基石——商会自治规范研究

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。     

猪毛色遗传的研究进展

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。     

中华人民共和国农业部公告 第267号

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。 …     

鸡败血支原体垂直传播模式及其阻断方法

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。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

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.     

不同样本商品蜂蜜中硒含量的测定

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。     

乳酸杆菌益生作用机制的研究进展

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。     

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.