青饲牧草地化学除草试验报告

对６种青饲牧草用７种除草剂进行除草试验。证明播后苗前墨西哥类玉米用４０％阿特拉津胶悬剂０．９０ｋｇ（ａｉ）／ｈｍ＾２；Ｍ－８１Ｅ饲用高粱与串叶松香草适宜用６０％丁草胺乳油０．９０ｋｇ（ａｉ）／ｈｍ＾２；苏丹草适宜用６０％丁草胺乳油０．９０ｋｇ９ａｉ）／ｈｍ＾２与２５％绿麦隆可湿性粉剂０．９４ｋｇ（ａｉ）／ｈｍ＾２，紫苏用１２％恶草灵乳油０．２７ｋｇ（ａｉ）／ｈｍ＾２与８４％ｃｈｉｎｃｈ乳油１．８９     

蚕沙中黄酮类化合物的提取工艺

采用L9(3^4)正交试验设计对浙江海宁蚕沙中黄酮类化合物的热回流提取工艺进行了优化，所得出最佳工艺条件为；乙醇浓度为30％，料液比1：30，提取时间3h。     

Investigation of Cervical Patency and Uterine Appearance in Domestic Cats by Fluoroscopy and Scintigraphy

The cervical patency of six domestic female cats was monitored under sedation by infusion of contrast medium (Omnipaque) into the cranial vagina during early oestrus, mid‐oestrus, late oestrus and interoestrus or a radiopharmaceutical (^99mTc‐HSA) during mid‐ and interoestrus in a non‐ovulatory oestrous cycle. The transport of the contrast medium or the radiopharmaceutical through the cervix and within the uterine horns was observed under fluoroscopy and with the aid of scintigraphy. In three of the queens, transcervical transport of contrast medium was demonstrated in all stages of oestrus, in one queen during mid‐oestrus, late oestrus and 1 day after oestrus, and in two queens only during late oestrus. The relations between the cervical patency to the contrast medium and the oestrous behaviour, cornification of the vaginal cells and the serum oestradiol‐17β concentration were evaluated, and a relationship was found between the cervical patency and the degree of vaginal cornification. Transcervical transport of the radiopharmaceutical was observed in three queens during mid‐oestrus. When the cervix was open, hysterography under a fluoroscope and hysteroscintigraphy were performed. The fluoroscopic and scintigraphic recordings revealed the patterns of the uterine contractions during oestrus in both ascending and descending directions, and the movement of the uterine contents back and forth between the uterine horns. The hysterograms were classified according to the shape of the uterine horns and the appearance of the endometrial lining. Spiral‐shaped uterine horns with a smooth inner contour were observed in two queens, and a corkscrew appearance with irregular filling defects in the uterine lumen was shown in two queens that had developed subclinical cystic endometrial hyperplasia. These findings demonstrated that fluids or particles deposited in the cranial vagina of the cat can be transported into the uterus during some stages of the oestrous cycle. The fluoroscopic and scintigraphic techniques developed in this study may be further modified to permit more detailed studies of uterine contractile patterns and sperm transport in the feline female reproductive tract. Hysterography proved useful to diagnose uterine disease. The information on cervical patency is of value also for the development of techniques for artificial insemination in this species, and should be studied also in the ovulatory cycle.     

装修与电气

本文着重地论述了由装修而引发的电气安全技术问题已到了不容忽视的程度。就此问题作 者提出了自己的观点及解决办法。     

浅谈鸡球虫病的免疫

鸡球虫病是一种危害性较大的肠道寄生虫病,多发于3个月龄以内的仔鸡.尤以15～45日龄的雏鸡最易感染,近年来,球虫疫苗应用,使工厂生产的养鸡场在鸡球虫病控制方面取得显著成绩.笔者就鸡球虫病免疫在生产实践中的应用,作肤浅论述.     

新引进国外牧草品种比较试验

为了适应我市奶业发展的需要，２０００年我们从国外新引进牧草品种４６个，第一批将９个冬季牧草品种在南平市大横现代农业科技园区引种园进行品种比较试验研究，现将这些品种试种、田间观察、考种测产及生产情况比较材料总结如下：１材料与方法１．１供试品种参试的牧草品种共有９个，即：白三叶（Trifoliumrepens）、紫花苜蓿（Medicagosativa）、多花甜皂角（Aeschynomenesp）、蒺藜草（Aesehynomenesp）、稷（Panicomcoloratum）、多花黑麦草（Loliumsp）、多年生黑麦草（Loliumperenne）、冬油菜（Kozepor）、春小黑麦（Narla）。…     

面对WTO谈成都蚕业的发展出路

面对WTO，蚕业必须深化改革，加快体制改革和技术创新，从调整结构、区域化布局，探索桑地流转机制，扩大生产规模，加强生产基础，扶持龙头企业，扶持产业化，提质上档，提升蚕业内在竞争力，应对“入世”。成都蚕业的发展必须要顺应形势和战略转变，这既是蚕业生产今后的指导思想和发展方向，又是进一步地发展和振兴成都蚕业的战略重点和工作重点。本就成都蚕业发展历程、产业化现状、制约因素、发展方向、对策措施等提出一些粗浅的认识。     

用分子生物学方法鉴别检测动物源性饲料中的牛羊源性成分

为了防止海绵状脑病疫区和痒病疫区反刍动物源性饲料进入我国 ,非常有必要对贸易往来中的肉骨粉品种来源进行鉴定检测。我们采用分子生物学方法从动物源性饲料中鉴别检测牛、羊特异性线粒体DNA的片段 ,并用限制性内切酶SspⅠ对PCR产物进行酶切鉴定及DNA序列测定。该方法的灵敏度可达 0 .12 5 % ,具有灵敏度高、快速和特异性强的优点。     

森林-沼泽交错群落组成结构与物种多样性的研究

通过对2种类型沼泽地进行调查，研究，发现沼泽与森林之间的过渡区，随着空间地势的逐渐升高，沼泽化程度由强到弱，群落的物种多样性沿着沼泽至森林的方向，随着环境梯度的增加，也逐渐增多，邻近森林的群落达最大值。     

香菇“9101”菌株选育研究报告

1991－1998年从长白山采集的野生香菇子实体中，通过分离、筛选、生物学测定、出菇试验、品种对比试验等方法，选育出适合吉林省气候条件的香菇菌株－9101。“9101”属于低温型菌株，生育期约160d，有效积温3200℃，中晚熟种，出菇中心温度7－18℃，适合北方地区代料栽培，也可用于段木栽培。