RADIOGRAPHIC IMAGING OF THE CANINE INTERCONDYLAR FOSSA

The intercondylar fossa is believed to play an important role in the pathology of cranial cruciate ligament rupture and therefore has received considerable attention in the last decade. Accurate radiographic imaging of the intercondylar fossa requires that the central x-ray beam pass through the center of the intercondylar "tunnel". The anatomy of the canine intercondylar fossa is similar to humans, however, the orientations of the intercondylar fossa's differ. Consequently, the positioning techniques described for humans are not appropriate for the dog. To pass through the center of the dog, intercondylar fossa, the central x-ray beam should be 12° (S.D. 1.7°) caudal from the femoral diaphysis in the sagittal plane and obliqued caudolateral to craniomedial 7° (S.D. 0.60°) (caudo78°proximo7° lateralcraniodistomedial oblique). Cross table positioning was used with the hip flexed and the radiograph cassette placed on the cranial surface of the stifle. However, superimposition of the tuber ischii and soft tissues caudal to the femur made 15° to 20° the best angle obtainable. There was not a significant difference (p = 0.17) in the notch width index between a 12° versus 20° angle of the central x-ray beam caudal to the femoral diaphysis, both with 7° of external rotation of the stifle. The notch width index of 0.252 obtained from radiographic measurements was not significantly different from measurements obtained grossly of 0.254 (n = 26; p = 0.69). Failure to oblique the central x-ray beam caused a significant (p = 0.0008) decrease in the apparent fossa width radiographically.     

7种能量饲料淀粉降解率的研究

以6头装有永久性瘤胃瘘管的浏阳去势黑山羊为实验动物,利用瘤胃尼龙袋技术研究大麦、大米、高粱、荞麦、小麦、小米、玉米等7种常用谷物饲料淀粉在羊瘤胃内的降解率规律。结果表明各种饲料淀粉有效降解率(%)顺序为:大麦>小麦>玉米>大米>荞麦>高粱>小米。其中以大麦的淀粉有效降解率最高达97.05%,小米的最小为36.43%,其它依次为96.28%、55.37%、45.23%、44.10%、42.58%。     

贵南县乡镇农业技术推广体系存在的问题及其对策建议

乡镇农业技术推广体系是实施科技兴农战略的重要力量,乡镇农业技术推广人员对于提高农民科学文化整体素质起到重要作用。笔者通过对贵南县乡镇农业技术推广现状分析,指出乡镇农业技术推广工作存在着基础设施条件差、推广经费不足、管理体制不顺、推广工作难度大、专业技术人员少、业务素质不高、农技人员待遇低等突出问题,并结合实际,有针对性地提出了搞好乡镇农业技术推广工作的对策建议。     

湘中农区壶天山羊的生产性能及生态养殖技术研究

通过采用测定200只壶天山羊的体尺体重,统计66胎产仔情况、屠宰6只成年羊,将8只成年杂交羊(壶天羊×马头羊)和50只成年壶天羊作对比等办法,从而真实系统地总结了该山羊的各项生产性能.对以"七化四结合"为主要内容的山羊生态养殖关键技术进行了研究,提出了"羊→沼→稻(菜或草)"生产模式和"企业 农户"的经营模式.     

利用体外法研究豆粕型日粮添加烟酸对绵羊瘤胃发酵的影响

本试验培养底物及瘤胃液供体动物日粮为玉米 -豆粕型日粮 ,实验用瘤胃液来自3只安装永久性瘤胃瘘管的绵羊 ,体外实验按不同烟酸添加剂量分为13个试验组 (0、50、150、250、350、400、450、500、600、700、800、900、1000mg/kg) ,每个试验组4个重复。在体外培养24小时后 ,测定培养液中NH3-N、瘤胃细菌N产量、原虫数量、总VFA产量及乙酸、丙酸、丁酸产量和乙酸/丙酸值 ,用以确定在该氮源日粮条件下 ,添加烟酸对瘤胃发酵的影响 ,并对烟酸适宜添加范围进行了研究。实验结果表明 ,在豆粕型日粮来源培养底物中 ,烟酸适宜添加范围为450～600mg/kg。     

绿色富硒牧草饲料作物生产技术规程

本规程规定了绿色富硒牧草饲料作物的生产基地环境、种植区域分布、生产管理、刈割利用、票证管理等内容,并制定了牧草饲料作物硒含量达到0.01～0.1mg/kg的产品标准.     

叶绿素荧光技术在筛选光合突变体中的应用

叶绿素荧光技术作为光合作用研究的手段,在光合突变体筛选中起到了重要作用。使用该技术,大量光合突变体得以分离,并且随着分子生物学的进展,突变基因也被陆续克隆,同时利用这一技术的筛选方法也随着人们对光合作用机制认识的深入,不断得到了改进,本研究就这方面进展做以综述。     

A Modified One-Stage Repair of Third-Degree Rectovestibular Lacerations in Mares

A modified one-stage surgical repair was performed on eight mares that suffered from third-degree rectovestibular lacerations. The rectovestibular septum was reconstructed by three lines of sutures using polydioxanone. Primary healing was achieved in seven mares. Four mares got pregnant after the surgery, and no further injury was noticed at subsequent delivery. Complications of the currently used technique included pneumorectum (in one mare) and rectovestibular fistula (in another mare). The obtained results indicated that mares with third-degree rectovestibular lacerations are candidates for this modified one-stage technique with satisfactory outcome for subsequent fertility.     

地毯式草坪的生产技术

通过几年来不定期文献检索和试验得出：地毯式草坪具有重量轻,建坪质量高,节约土地等优点。生产中基质可用７０ ％ 火土或腐质土＋ ３０ ％ 田园 土,隔离布用废旧纺织袋最佳,光照强度在５０００ｌｕｘ ～１００００ｌｕｘ 为宜,管理方法与常规建坪相同。     

应用单引物PCR指纹技术分析Vc-獭兔的分子遗传结构

采用1条小卫星引物M13(5’GAGGGTGGCGGTTCT3’)和2条微卫星引物(GTG)5、(GACA)4，对Vc—Ⅰ系、Vc—Ⅱ系獭兔、日本大耳白兔(JWR)和青紫蓝(QZL)4个品系各8只，总计32个个体的遗传结构进行了DNA指纹分析。结果，3条引物的扩增产物都呈现良好的多态性和稳定性；对每个品系混合DNA池进行分析，计算出了4个品系间及32个个体间的共有带率及遗传距离指数，通过聚类分析，得出各品系间和个体间欧式遗传距离，并绘制出4个品系间及各品系32个个体问的亲缘关系树状聚类图，从而初步建立了4个品系兔的SPAR指纹图谱。