为全面提高蚕种质量再奋蹄

近年来,江苏省的蚕种质量有了明显的进步.已为业内外所认可。2002年初有十余万张一代杂交种出口,输入方的生产结果反映较好。然稍作冷静分析,平心而论目前的蚕种质量,离我省历史上曾经形成并持续了很长时间的真正的优质蚕种——“铁种”尚有不小的差距,故应十分重视存在的不足,采取有效措施.为全面提高蚕种质量“再奋蹄”。     

浙江省建立蚕种质量保障机制

<正>浙江省对蚕种生产、经营实行许可制度,并建立质量追溯制度,以便于蚕农购买的蚕种在发生质量问题后能及时追索赔偿。浙江省发布了《浙江省蚕种管理条例》,从2006年12月1日起,未经国家或者省蚕品种审定委员会审定或者审定未通过的蚕品种,任何单位和个人不得生产、经营或者推广。为防止不法分子炒卖蚕种,还规定蚕种生产、经营者不得向无蚕种经营     

提高蚕种质量的几点体会

<正>蚕种质量受各方面综合因素的制约,本人根据多年来的工作实践,认为提高蚕种质量要抓好以下几个环节.一、狠抓桑园管理,提高桑叶质量优质桑叶是提高蚕种质量的的物质基础.因此,要繁育优质蚕种,就必须从以下几个方面提高桑叶质量.1.推广优良桑品种,注意桑品种搭配我市有四个蚕种场,桑园面积1580亩,新老桑园比例为2:8,早生桑品种以育2号为主,其它为湖桑32号、197、育151,一之濑等,基本符合蚕种繁育需要.但我市地处淮北地区,几乎每年4月份早生桑都要遭到晚霜     

改进检种设施,提高检种质量

湖州蚕种检验室建于70年代初,是当时浙江省两家检种室之一.二十多年来为嘉兴地区、湖州市制取优质蚕种,杜绝微粒子病胚种传染做了大量检验工作,对发展蚕桑生产和经济建设作出了较大贡献.蚕种母蛾检验是一项技术要求高、责任重、季节性强、工作量大的工作.它关系到广大蚕农的切身利益,种场的经济效益,为此,     

蚕种不良卵的淘汰率和再发生率与蚕种质量关系

<正>我省目前蚕种质量以“四率”进行考核,即“良卵率、孵化率、杂交彻底率、微粒子毒率”,这是蚕种质量检验考核的一大进步.孵化率、杂交彻底率、微粒子毒率都可以通过直接检验比较公正地反映蚕种内在质量,而良卵率指标在蚕种生产后期处理中易受人为因素的干扰,不能准确地反映蚕种的内在质量.在实际考核中,考核结果也没有与蚕种结算价格挂钩.我们在生产中发现冷浸种不良卵的淘汰率和越年种不良卵的再发生率与蚕种质量有很大的内在关系.     

提高蚕种质量 巩固蚕业基础

<正>江苏省蚕种生产具有悠久的历史,尤以质量优良而在国内外赢得了良好的声誉。 改革开放以来,我省蚕种生产又得到了迅速的发展,现有蚕种场40余个,年产蚕种达600余万张,基本上满足了农村用种的需要,为茧丝绸事业作出了积极的贡献。 但是近年来,由于体制变化等原因,出现了管理弱化、投入减少、科研滞缓的现象,严重威胁着蚕种生产的安全和质量的提高。众所周知,蚕种是茧丝绸生产的基础,蚕种生产稳不稳,特别是质量好不好,将直接会影响农村的蚕茧生产。因此,如何保证和提高蚕种质量、稳定蚕种生产是我们面临的、必须研究解决的现实问题。     

加强质量管理 提高蚕种质量

<正> 近十年来,江苏省的蚕茧生产发展迅速,1984年全省蚕茧产量超5万吨(100万担),达到这个目标,前后花了35年时间。1989年又突破10万吨(200万担)大关,仅用了5年时间。为满足农村需种量的急速增加,蚕种生产战线上的领导、技术人员和广大职工进行了极大的努力,作出了积极的贡献。但也不能否认,蚕种质量未能同步提高。因此,努力提高蚕种质量,是当前蚕种生产方面的一个重要任务。目前,我省的蚕种质量总的估价还是好的和比较好的,不好的是少数,但应引起我们的高度重视,为了尽快使我省蚕种质量达到     

浅谈蚕种生产中易忽视的几个问题

随着市场经济的进一步深入 ,蚕种生产已成为需方市场 ,蚕种质量的竞争更为激烈 ,为了立足市场 ,必须抓好质量 ,已在各蚕种生产单位形成共识 ,创优质 ,争名牌 ,生产出优质高产的蚕种是各单位的共同目的。近几年来各单位已在培桑、养蚕、制种、防病消毒等方面形成一套较完善的技术管理措施 ,积累了相当丰富的经验 ,但在某些方面没有引起高度重视 ,降低了蚕种质量 ,造成经济损失 ,本人就在冷库中几年来碰到一些问题谈些看法 ,供同行参考指正。１原种的选择蚕种生产过程也是一个选择过程 ,选蚕、选茧、选蛹、选蛾、选卵是蚕种生产中必不可少的选…     

推行全面质量管理生产优质蚕种

本文总结了本场全面推行质量管理生产优质蚕种的经验、方法和成效。重视提高职工素质，完善蚕种质量目标管理的标准，方法。严格质量检测制度，繁育出的蚕种质量名列全国前茅。     

狠抓关键措施落实 稳步提高蚕种质量

高邮市蚕种场位于高邮市南郊,是一座拥有五十年历史的专业种场,近几年,蚕种生产质量稳步提高,2005年、2007年分别被省蚕种管理所表彰为蚕种生产先进单位。尤其是2007年,高邮场在春、秋两季都遇到了较为不利的气候,我们着重抢抓管理、狠抓关键措施的落实,经过全场干部、职工的共     

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.