提高绿壳蛋鸡产蛋率的几点措施

绿壳蛋鸡生产中，提高产蛋率是提高生产性能、增加经济效益的重要措施之一，作者多年从事绿壳蛋鸡生产工作，要提高绿壳蛋鸡的产蛋率，应采取以下综合性技术措施。     

绿壳蛋鸡与海兰褐壳蛋鸡的养殖经济效益比较

为了摸清绿壳蛋鸡生产性能、市场前景和经济效益,笔者于2006年3—5月在内蒙古额济纳旗达来呼布镇鸡场进行了饲养绿壳蛋鸡与海兰褐壳蛋鸡的对比试验。试验结果表明,饲养绿壳蛋鸡经济效益显著,市场前景广阔。     

现代遗传育种学理论在卢氏鸡绿壳蛋品系选育中的应用

笔者应用现代家畜遗传育种学理论来指导选育卢氏鸡绿壳蛋品系,对卢氏鸡群体中的3.6%个体产绿壳蛋的遗传性状进行提纯选育,培育出卢氏绿壳蛋鸡纯系。经研究,卢氏绿壳蛋鸡对微量元素,特别是硒元素有富集作用。卢氏鸡绿壳蛋蛋壳厚而致密,耐贮藏、易运输,炎热夏季可贮藏在阴凉通风环境中2月而不腐。经0世代~4世代选育,卢氏鸡绿壳品系群体产绿壳蛋比例已达95%以上。又经十多个世代的不懈选育,卢氏鸡绿壳蛋品系蛋壳色泽基本一致,体型外貌更趋统一,生产性能得到大幅提高,成为独立于蛋鸡生产白壳、褐壳体系之外的一个新品系——卢氏鸡绿壳蛋品系。     

充分发挥协会职能 全力推进绿壳蛋鸡产业化

绿壳蛋呈天然绿色，富含铁、锌、硒等微量元素，对儿童智力发育和抗衰老保健均有重要的食疗作用，深受消费者的青睐，具有很大的市场空间。几年来，鄂州市绿壳蛋鸡养殖协会充分发挥在行业中的桥梁纽带作用，以专业大户为骨干，以系列化服务为手段，以提高绿壳蛋鸡养殖业组织化程度为突破口，着力抓好绿壳蛋鸡产业化经营，搭建了绿壳蛋鸡养殖业健康、快速发展的平台。2003年绿壳蛋鸡协会销售绿壳保建蛋0．24万t、种苗80万羽，带动周边300多个养殖专业大户走上养鸡致富之路，形成了以段店镇为中心幅射全市的30万只绿壳蛋鸡生产基地。     

卢氏绿壳蛋鸡生态放养技术

卢氏绿壳蛋鸡是我国优良地方品种之一．所产绿壳蛋具有高锌、高硒、高碘、低胆固醇的特点，营养价值较高。卢氏绿壳蛋鸡适宜笼养，更适宜生态放养。在选择生态放养前要了解绿壳蛋鸡的生产、生活习性，掌握其生产性能、饲养管理及疫病防控知识，以提高经济效益。     

绿壳蛋鸡的育雏技术

绿壳蛋鸡在饲养过程中雏鸡体温调节能力差,消化系统发育不完善,体弱,对环境变化敏感,所以育雏技术直接影响绿壳蛋鸡的成活率,是养鸡生产成败的关键时期.     

EM制剂对绿壳蛋鸡生产性能影响的研究

本文探讨了EM制剂对绿壳蛋鸡的生产性能的影响。把400只372日龄绿壳蛋鸡随机分为两组,试验组日粮中添加3‰EM制剂。观测EM对蛋鸡生产性能的影响。结果表明:EM制剂能提高饲料报酬20.92%(p<0.01),产蛋率11.03%(p<0.01),控制了有害气体的产生,增强鸡对疾病的抵抗力,死淘率降低2.5%,综合经济效益提高22.16%。     

贵州:安顺建设绿壳蛋鸡示范基地

<正>为加快贵州省安顺市农业产业结构调整工作进程,推进生态牧养绿壳蛋鸡示范基地建设项目实施进度,近日,该市畜牧兽医局组织各县、区畜牧兽医部门召开生态牧养绿壳蛋鸡示范基地建设项目推进现场观摩会。今年以来安顺市大力实施农业产业结构调整,推进生态畜牧业发展,全市共批复生态牧养绿壳蛋鸡示范基地     

关于绿壳蛋鸡

编者的话:近两年蛋鸡养殖业一直处于低迷状态,养殖户比较收益下降,绿壳蛋成为蛋品市场的新亮点。众商家大打“绿色食品”牌,不遗余力宣传其营养保健功效,消费者对绿壳蛋也青睐有加,而广大养殖户也意欲上马绿壳蛋鸡养殖项目。那么,绿壳蛋鸡在生产性能上究竟有哪些优势?其蛋品是否真有较高的营养价值?绿壳蛋鸡发展前景如何?本刊特编发此文,以飨读者。     

贵州:安顺市加快推进生态牧养绿壳蛋鸡示范基地建设项目

<正>为加快安顺市农业产业结构调整工作进程,推进生态牧养绿壳蛋鸡示范基地建设项目实施进度,11月29日,市畜牧兽医局组织各县区畜牧兽医部门召开生态牧养绿壳蛋鸡示范基地建设项目推进现场观摩会。今年以来安顺市大力实施农业产业结构调整,推进生态畜牧业发展,全市共批复生态牧养绿壳蛋鸡示范     

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。     

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.     

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。     

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.     

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。     

獭兔睾丸的组织学观察

家兔作为一种实验动物 ,推动了繁殖技术的发展。本试验通过对不同年龄公獭兔的睾丸进行组织学观察、测定 ,研究精子的发生规律 ,为系统地进行繁殖生理工作提供依据。1　材料与方法选 60日龄、75日龄、90日龄 3个年龄公獭兔各5只 ,用外科手术法摘取两侧睾丸 ,放入 Bouin氏液中固定 ,二甲苯透明 ,石蜡包埋 ,切成 5～ 8μm切片 ,H.E.染色。在显微镜下观察 ,并进行定量组织学指标测定及差异性比较。2　结果和讨论2 .1　睾丸定量组织学指标的测定结果　见表 1。表 1　獭兔睾丸定量组织学指标　　　μm,个 /精细管60日龄 75日龄 90日龄曲细精管…     

Observations of fracture of the anconeal process of the ulna of swine

Fractures of the anconeal process of 5 pigs ranging in age from 4 to 8 months were studied radiographically and histologically. Clinically, animals with a fracture of the anconeal process had a "tight," restricted gait. In pigs at 4.5 months of age, a radiolucent line through the base of the anconeal process was composed of fibrocartilage, fibrous connective tissue, and hyaline cartilage. Subperiosteal proliferation of woven bone was located along the cranial surface of the olecranon, adjacent to the base of the anconeal process. In older animals, the radiolucent line through the anconeal process contained variable amounts of fibrous connective tissue and fibrocartilage. The proliferation of subperiosteal bone at the base of the anconeal process formed a "buttress callus" which retained a radiolucent area between the callus and the proximal surface of the anconeal process. The latter region of radiolucency was continuous with the transversely oriented line that traversed the base of the anconeal process.