不同桑品种养蚕成绩比较试验

<正>以农桑系列为代表的新一代桑品种,已经逐步取代湖桑系列桑品种成为我省乃至周边地区的主栽桑品种。为进一步了解农桑系列桑品种与其它新一代桑品种的养蚕实绩,我们依据《浙江省桑树品种综合性状调查办法》的要求,通过养蚕生物试验,评定各品种叶质的优劣,现将试验结果报告如下。     

杂交桑品种——塘10×伦109号生物鉴定初报

利用杂交桑品种所具备的当年播种,当年建园,生长快,耐剪伐,一年可多次养蚕等优点,在新疆干旱条件下进行试种栽培,对杂交桑品种—塘10×伦109的养蚕成绩进行生物鉴定,结果初步表明:杂交桑品种—塘10×伦109春秋产茧量明显低于和田白桑与9204,茧质和丝质略低于或相仿与对照种。     

6个杂交桑品种养蚕比较试验

通过6个杂交桑品种采叶养蚕比较试验,探明了不同桑品种的养蚕效果.桂桑优12和桂桑优62的蚕期经过、蚕体质、茧质、丝质等综合成绩好于桂桑6号、桑特优2号、粤桑11和粤桑51,而蚕茧产量、茧质二项成绩以桂桑6号、桑特优2号较具优势.在桑园建设中桑树品种应与养蚕布局科学搭配栽植,充分发挥桂桑优12、桂桑优62与桂桑6号、桑特...     

不同人工饲料配方组成对家蚕摄食性的分析

为改进家蚕人工饲料配方，探讨人工饲料配方的营养组成对养蚕的效果。试验以“华广”、“夏广”为供试品种，养蚕成绩表明，对“华广”品种，用含春桑嫩芽叶粉配方比含秋桑嫩芽叶粉配方养蚕效果好；对“夏广”品种，用含绿豆粉配方比含豆粕粉的配方养蚕效果好。     

条桑育与片叶育的比较分析

条桑育是省力化养蚕的一条有效途径,为了弄清我区的气候、桑品种、种植规格是否适合条桑育,笔者利用现有的桑园进行条桑育与片叶育对比试验,并对试验进行了评价和比较分析.试验结果表明,条桑育养蚕成绩好,省工省力,效率高,但桑树种植密度每亩要达到6000～7000株才能提高产量.     

杂交桑沙二×伦109与湖桑32号饲喂家蚕苏菊×明虎的对比试验

为了进一步推广杂交桑栽植,走蚕桑生产低成本、快速度、高效益、省力化发展的道路,我区于2003年引进广东杂交桑沙二×伦109,目前全区的栽植面积已发展到140hm^2。为进一步调查该桑品种和我区传统桑品种湖桑32号对蚕茧质量与养蚕成绩影响,2007年春蚕期我们进行了杂交桑沙二×伦109与湖桑32号饲喂家蚕苏菊×明虎的成绩对比试验,现将试验情况简报如下。     

桑品种育72—1主要经济性状的比较试验

桑品种育72—1是采用杂交育种方法选育出的新桑品种。与现行当家品种湖桑32号比较,通过4年调查亩产叶量提高15.02%:2年4期养蚕叶质鉴定成绩,优于湖桑32号,叶质较好。     

桑树良种与高产关系调查

德清县高桥公社红丰大队,试种了13个桑品种,据观察,各品种之间的抗病力、树势、产叶量和养蚕成绩都有明显的差距。1975年曾对生长、发病情况作了调查,如表1。     

果桑大十与团头荷叶白养蚕对比试验简报

果桑是我市引进培育繁殖的新经济林作物 ,既可采果又可采叶养蚕 ,为了进一步调查果桑对养蚕成绩的影响 ,特进行与本市当家桑品种团头荷叶白对比试验。1　供试材料供试桑品种为 :团头荷叶白、果桑十大。供试蚕品种为 :春晓×浙蕾。试验地点 :蚕桑站实验室。2　试验方法2 .1　设区 　设团头荷叶白品种、果桑十大品种饲养各 3个重复小区 ,每区 2 0 0头。2 .2　处理方法 　 4龄眠蚕前同一环境 ,同一处理方法 ,至眠大开始分区 ,同一环境分区饲养 ,直至上簇采茧 ,调查各桑品种间养蚕实绩。3　试验结果春晓×浙蕾品种于 4月 2 4日收蚁 ,眠大前均喂…     

中生早熟桑品种湖桑87号应用初报

本文地由绍兴农校选育，多个单位试验验证的中生早熟桑品种湖桑８７号的特征，生长特点作了介绍。并对其桑叶产量，桑叶的化学成份，养蚕成绩及栽培技术等作了报道。     

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。     

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。     

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。     

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.     

Mechanism of Action of Probiotic Function of Lactobacilli

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.     

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。 …