我国经济快速发展背景下,居民的生活质量得到提升,现阶段对于健康鸡肉需求也不断提升.鸡肉主要是利用大规模养殖场养殖获得,种类较为单一,鸡繁育改良技术的提出对鸡肉品质的提升有重要帮助,还能够提升市场上鸡的数量,人们对于优良品质鸡肉的需求也因此得到满足.本文对鸡繁育改良的方式以及技术特征进行具体概述,希望能够推动鸡繁育改良工作的发展.

广西优质鸡资源开发目前已成为我国特色突出、优势明显的产业,产业规模居全国第二,种苗在全国20多省(市、区)广泛应用,具有广阔的市场,在带动农民致富、脱贫攻坚和乡村振兴中发挥重大作用.但广西优质鸡育种工作相对滞后,实际生产中仍然存在繁殖性能低,肉鸡饲养成本高,肉鸡均匀度差等问题.针对市场需求,为了解决和突破制约产业发展的瓶颈,进一步完善良种繁育体系,提升企业核心竞争力,广西畜牧研究所联合广西参皇养殖集团有限公司、广西鸿光农牧有限公司开展项目研发.项目获授权国家发明专利2件(ZL 201811102191.7、ZL 201510597780.7);实用新型专利4件(ZL 201721772701.2、ZL 201721738807.0、ZL 201821466883.5、ZL 201821466884.X),国家审定新品种2个,发表核心期刊等学术论文18篇.

一鸿光麻鸡培育背景 瑶鸡原产地为广西南丹县,又称南丹瑶鸡.当地瑶族人有养“大鸡”的习俗,多选留体型高大的本地公、母鸡作种用.其体型比一般地方鸡种高大,公鸡羽色以金黄色和金红色为主,黑褐色次之,母鸡羽色以麻黄色、麻黑色为主.公母鸡均为青脚胫,部分带胫羽.

A selected yeast fraction (SYF) was tested for the purpose of preventing pullorum disease and fowl typhoid in breeder chickens. In a challenge-protection experiment, commercial Three-Yellow breeder chicks were initially divided into groups A, B (challenged, treated), C (challenged, untreated), and D (unchallenged, untreated). The group A diet was supplemented with SYF and group B was supplemented with Acidipure via drinking water. At 7 D, birds of groups A, B, and C were divided into 2 equal subgroups (A1-A2, B1-B2, and C1-C2). Subgroups A1, B1, and C1 were challenged with Salmonella pullorum (SP), while subgroups A2, B2, and C2 were challenged with Salmonella gallinarum (SG). Clinical signs and mortality were recorded daily. At intervals, antibodies against SP and SG were detected by a plate agglutinate test (PAT). At 42 D, all birds were weighed and necropsied, lesions were recorded and challenge pathogens were isolated. Results showed that SP and SG isolation positive rates of groups A1-A2 were significantly lower (P < 0.05) than those of B1-B2 and C1-C2, respectively. The average body weight (BW) of groups A1-A2 was significantly higher (P < 0.05) than that of B1-B2 and C1-C2, respectively. In the field trial, chicks were randomly divided into 3 groups. Group 1 birds were fed a diet supplemented with SYF, group 2 diet was supplemented with Acidipure via drinking water, and group 3 was fed the same but un-supplemented diet as the control group. Antibodies against SP and SG were detected by PAT at 120 D. The antibodies positive rate of group 1 was significantly lower (P < 0.05) than those of groups 2 and 3, while no significant difference (P > 0.05) was found between groups 2 and 3. The results demonstrated that SYF supplementation could significantly decrease SP and SG infection rates, improve the BW of birds challenged with SP and SG, and was more effective than Acidipure via drinking water.

为了探讨尽可能延长母鸡开产后免疫保护期的可能性,本试验选用市售的两种新城疫(ND)-传染性支气管炎(IB)-禽流感(AI)H9三联灭活商品疫苗在广西地区主要地方品种三黄鸡的两个品系黄1和黄2上分别进行对比免疫试验.种鸡开产前的150日龄分别使用疫苗A(精制浓缩型油苗)、疫苗B(普通油苗)免疫,然后分别于免疫时以及免疫后的1个月、2个月、3个月、4个月和5个月分别使用HI试验和ELISA测定两组鸡只相应产生的血清抗体滴度.结果表明,在黄1品种上的试验,疫苗A免疫组的ND抗体水平高于疫苗B免疫组,两组鸡的H9、IB抗体水平则无明显差异;在黄2品种的试验,疫苗A免疫组的ND、H9、IB抗体水平均高于疫苗B免疫组;开产前免疫疫苗A后5个月,黄1和黄2品种均仍能维持较高的抗体水平,其中黄1品种可推迟补免时间20多天,黄2品种推迟补免时间1个月.

我国的养禽历史源远流长，然而就禽病研究而言，我国还是起步较晚的，有关文献将此原因归结为与传统散养户庭院养鸡的环境有直接的关系。20世纪70年代，我国逐渐建立起了大型现代化鸡场，养鸡技术水平也开始有了大幅度的提高。由于农村的经济体制以及产业结构都发生了改变，整体国民生活水平得到提高，规模化的养禽场和养鸡专业户开始大批建立，我国的规模化养禽也自此起步了。时至今日，我国已经成为世界养禽第一大生产国和消费国。集约化饲养过程中，虽然部分禽病得到了较好地控制和消灭，

<正>畜产品是重要的菜篮子产品,与群众日常生活密不可分,关系国计民生。党中央、国务院历来高度重视畜牧业生产,近几年来的中央一号文件均对现代畜牧业发展做出重大部署,为贯彻2010年中央一号文件精神,加快畜牧业生产方式转变,推进畜禽标准化规模养殖,农业部在2010年4月启动

鸡白痢是当前养鸡业常见的疾病,也是目前危害养鸡生产最严重的细菌病之一,给养鸡业造成很大的经济损失.本文就如何在短期内完成大批量鸡白痢净化检测方法进行试验,经过对种鸡核心种群三次白痢净化检测实践,第一次鸡白痢净化采用全血平板凝集试验,检测鸡10 000只,耗时3天.第二次及第三次均采用血清平板凝集试验,检测鸡分别为8 352只、6 176只,耗时分别为4天、3天.试验结果表明,本方法分工合理,效率高,检测速度快,节约成本,值得生产实践参考.