共查询到20条相似文献，搜索用时 78 毫秒
1.
广西黄羽肉鸡发展现状及向冰鲜市场转型的可行性分析 总被引：1，自引：0，他引：1
黄羽肉鸡作为南方地区的特色肉鸡品种,因其肉质鲜美、地域特色浓厚独特而广受欢迎。广西有丰富的地方优质鸡资源,如:广西三黄鸡、霞烟鸡、龙胜凤鸡、瑶鸡等。目前以龙头企业为主体,开发利用优质地方资源,实现了广西优质鸡产业的快速发展。如今黄羽肉鸡产业已经成为广西地区畜牧业典范并逐步建立起市场品牌效应,对广西经济发展起到至关重要的作用。本文拟通过总结广西地区黄羽肉鸡发展过程,分析符合目前广西地区居民饮食消费及风俗习惯的优质黄羽肉鸡所具备的特点,并对广西冰鲜鸡产业的发展进行可行性预测。 相似文献
2.
3.
4.
近年来，广西三黄鸡选种选育、杂交配套以及产业化、标准化生产取得了长足的发展，品种资源得到合理化保护和利用。广西三黄鸡以其肉质香鲜、风味佳而闻名全国，其配套系新品种市场推广应用成效显著。由于迎合了国内生产与消费市场对优质鸡的实际需求，饲养量居全国纯土鸡第一，肉鸡年产销量超过3．5亿只。据中国禽肉的需求量估测，优质鸡需求量... 相似文献
5.
6.
安卡红肉鸡是上海市华青曾祖代肉鸡场于1994年9月从以色列国P.B.U公司引进的四系杂交黄羽肉鸡品种,具有抗病力强、耐应激、易养快长、饲料转换高等特点,是世界家禽品种中唯一接近白羽肉鸡生产性能的黄羽肉鸡品种,商品代肉鸡49日龄平均体重2公斤,料肉比2.05:1。江村黄鸡是我国广东地区的黄鸡选育品种,商品代肉鸡77日龄严均体重1.5公斤,料肉比3.0:1,具有羽毛澄黄、体型紧凑、肉质鲜墩等特点,于1992年被引入我市。红宝肉鸡是法国ISA公司著名的黄羽肉鸡品种,是目前上海地区主要的黄鸡品种。 为了充分利用上海地区现有黄羽肉鸡品种资源,进一步筛选符合上海地区消费者需求的黄羽肉鸡杂交组合,更好更快地把优质黄羽肉鸡推向市场, 相似文献
7.
黄羽肉鸡是我国家禽品种的重要组成部分,近年来,随着人民生活水平的提高,人们的饮食观念转变为吃营养丰富、风味独特的食品,追求健康的饮食习惯,所以优质肉鸡的市场因此也越来越大。在北京,快大鸡和三黄鸡的价格分别为7．6元／kg、10元／kg,而中华宫廷黄鸡的价格则为32-40元／kg,广东纯土鸡的价格也在24～26元／kg。在消费需求的带动下,黄羽肉鸡产业在我国取得了长足发展,目前已经成为一些地区农民增收的重要来源。但在黄羽肉鸡发展过程中,也存在着一些问题。 相似文献
8.
9.
研究旨在探讨不同品种黄羽肉鸡毛囊密度性状的发育变化规律和品种间差异。试验以花山鸡、817肉鸡、清远麻鸡、溧阳鸡、瑶鸡和广西三黄鸡等为素材,测定不同周龄各品种毛囊密度。结果显示：各品种背部和腿部毛囊密度随着日龄的增长呈逐渐下降的趋势;3～9周龄时,花山鸡、清远麻鸡、溧阳鸡、瑶鸡和广西三黄鸡背部和腿部毛囊密度在不同周龄之间均呈显著差异（P<0.05）。处于上市日龄品种间的比较,除溧阳鸡、广西三黄鸡、花山鸡和817肉鸡,其他品种的背部和腿部毛囊密度显著高于罗斯308肉鸡、毛囊直径低于罗斯308肉鸡（P<0.05）;文昌鸡、狼山鸡、鹿苑鸡和崇仁麻鸡的背部和腿部毛囊直径显著低于其他品种（P<0.05）。品种内公母之间比较,瑶鸡和崇仁麻鸡的腿部毛囊密度在公母间存在显著差异（P<0.05）。各品种的体重分别与背部毛囊密度和腿部毛囊密度呈极显著负相关（P<0.01）,背部和腿部毛囊密度呈极显著正相关（P<0.01）。结果提示,可以通过对体重的选择间接调控毛囊密度性状,性别可能会影响不同品种腿部毛囊密度的大小,研究结果为培育适合冷鲜上市的黄羽肉鸡配套系提供基础。 相似文献
10.
近年来。“中国三黄鸡之乡”广西玉林市注重发展优质黄羽肉鸡优势产业,广泛推广“公司＋农户”的产业化经营模式,培养了一大批产业化养鸡龙头企业,养鸡业发展迅速,取得了良好经济效益。优质鸡养殖量连续8年以10％的速度增长,出栏肉鸡占两广优质鸡市场50％以上,带动农民收入4亿多元…… 相似文献
11.
选择中国大陆最早分离的H9N2亚型禽流感病毒(avian influenza virus,AIV)A/Chicken/Guangdong/SS/94(H9N2)(缩写为SS株)和1998年大流行时期分离的H9N2亚型AIVA/Chicken/Shanghai/F/98(H9N2)(缩写为F株)为研究对象,对其在SPF鸡体内的复制能力和传播途径特性比较后发现,F株在4周龄SPF鸡气管中的复制能力高于SS株,F株可以经气溶胶传播途径传播,SS株不能经气溶胶传播途径传播;利用反转录-聚合酶链反应(RT-PCR)方法获取F株和SS株的HA和NA基因的cDNA,序列分析得知,F株和SS株的HA和NA基因的同源性分别是96.6%和98.1%;HA基因的裂解位点氨基酸序列都是PARSSR↓GL,但有5个氨基酸的差异,即166位N(F)→D(SS)、198位A(F)→V(SS)、217位V(F)→I(SS)、335位G(F)→R(SS)、504位L(F)→S(SS);2株病毒的NA基因在63~65位都存在氨基酸缺失,但在NA基因红细胞吸附位点的氨基酸序列不同,分别是IKKDSRSG(F)和IKEDLRSG(SS)。F株和SS株的传播特性差异是否与其表面基因序列有关,有待进一步研究。 相似文献
12.
禽类的起源、演化及我国主要家禽品种类型与分布 总被引：1，自引：1，他引：0
家禽是重要经济价值动物.本文从禽类种群进化学说出发,简介了禽类的起源、演化、动物学分类和家禽的驯化(养)与品种的形成,并对我国主要家禽(鸡、鸭、鹅)地方品种和培育品种(配套系)的分布与类型作了描述,以期为研究我国家禽起源系统,保护与利用我国家禽品种,促进家禽生产可持续发展提供参考. 相似文献
13.
近年以来,由于市场因素的刺激,生猪的存养量大幅上升,再加上由于流通环节较多,流通非常频繁,流通距离越来越远。这对繁荣经济,增加养殖效益起了重要的推动作用,但也同时给疾病的感染和传播创造了有利条件,给猪病的防治带来了困难。有的猪场感染了传染病后,由于治疗不及时不得法,而造成了惨重的经济损失。2008年7月中旬,我街道一养猪户因盲目从外地购进中猪,发生猪病疫情,引起猪只连续死亡,造成一定的经济损失。根据流行病学、临床症状、剖检变化和实验室诊断,诊断该病为猪链球菌病和猪伪狂犬病混合感染,现报告如下。 相似文献
14.
１前言１．１鸡白冠病鸡白冠病是由卡氏住白细胞原虫寄生于鸡的红细胞和单核细胞而引起的鸡的贫血性疾病。吸血昆虫蚋和库蠓叮咬鸡引起传播，是主要的传播媒介，一般在夏末和秋季多发，由于夏季降雨量较大，部分沟渠积水，库蠓和蚋多孳生，因此在多雨水涝的年份发病率明显增高。１９９８年中国从南到北发生洪涝灾害，吸血昆虫的孳生格外严重，出现了一个白冠病多发年，而后两年发病稍轻，并有地区性，今年８月中旬以来白冠病的发病呈抬头趋势，有一定的死亡率，对蛋鸡产蛋率也会引起一定程度的降低，应引起养鸡户的重视。１．２鸡痘鸡痘也是… 相似文献
16.
17.
18.
Pinard CL Weiss ML Brightman AH Fenwick BW Davidson HJ 《American journal of veterinary research》2003,64(1):104-108
OBJECTIVE: To evaluate lactoferrin and lysozyme content in various ocular glands of bison and cattle and in tears of bison. SAMPLE POPULATION: Tissues of ocular glands obtained from 15 bison and 15 cattle and tears collected from 38 bison. PROCEDURE: Immunohistochemical analysis was used to detect lysozyme and lactoferrin in formalin-fixed, paraffin-embedded sections of the ocular glands. Protein gel electrophoresis was used to analyze ocular glands and pooled bison tears by use of a tris-glycine gel and SDS-PAGE. Western blotting was used to detect lactoferrin and lysozyme. RESULTS: Immunohistochemical staining for lactoferrin was evident in the lacrimal gland and gland of the third eyelid in cattle and bison and the deep gland of the third eyelid (Harder's gland) in cattle. Equivocal staining for lactoferrin was seen for the Harder's gland in bison. An 80-kd band (lactoferrin) was detected via electrophoresis and western blots in the lacrimal gland and gland of the third eyelid in cattle and bison, Harder's glands of cattle, and bison tears. An inconsistent band was seen in Harder's glands of bison. Lysozyme was not detected in the lacrimal gland of cattle or bison with the use of immunohistochemical analysis or western blots. Western blots of bison tears did not reveal lysozyme. CONCLUSIONS AND CLINICAL RELEVANCE: Distribution of lactoferrin and a lack of lysozyme are similar in the lacrimal gland of cattle and bison. Differences in other tear components may be responsible for variability in the susceptibility to infectious corneal diseases that exists between bison and cattle. 相似文献
19.
Harvey CE 《Journal of veterinary dentistry》2002,19(4):186-195
Crown width, height and buccal surface areas were measured on heads or skulls of four dogs and four cats, and were compared with similar measurements on models of human dentition. Buccal surface area variability was greater in dogs and cats than in humans, and teeth of cats were smaller. Horizontal (gingival and occlusal halves) and vertical (mesial, middle, and distal thirds) buccal surface area variability was also greater in canine and feline teeth compared with human teeth. This increased variability suggests the need for testing of reliability and repeatability of scoring when using plaque and calculus indices based on horizontal or vertical segmentation. Buccal surface area variability between teeth also prompts questioning the validity of equal weighting of smaller, irregularly-shaped teeth when calculating a mean mouth score. Whether equal or more reliable results would be obtained from scores of whole teeth in comparison with segmentation indices used currently has yet to be determined. 相似文献
20.
Over a period of about 12 years, 30 abnormal Schistosoma mattheei cercariae were found among a total of approximately 2.8 million examined. Initially seven were recovered from about 1.02 million (0.0007%), which were examined individually while being counted with the aid of a stereoscopic microscope. Subsequently, on the strength of relatively high percentages of abnormal individuals recovered when counting cercariae that failed to penetrate into oxen, it appeared that the morphologically abnormal cercariae were unable to swim and would mostly sediment out of a suspension while most of the normal cercariae would remain swimming. This surmise is supported by recovery of 23 morphologically abnormal cercariae (0.001%) from about 1.8 million, by examining the sediment after the cercarial suspension had been left standing undisturbed in glass measuring cylinders. The abnormalities ranged from aberrant tails only (e.g. an underdeveloped tail, or different degrees of schism) or aberrant heads only, to abnormalities of both the heads and tails. A suggested schematic classification of abnormal cercariae is presented. A young, adult hamster was exposed to eight S. mattheei cercariae with complete schism of the shaft of the tail, by pipetting the cercariae onto the shaved abdominal skin of the anaesthetised animal. Two underdeveloped females were subsequently encountered in squash preparations of the liver when the hamster was killed for worm recovery 10 weeks after infection, thus showing that some of the abnormal cercariae were viable. A method is also described for killing and fixing cercariae while retaining some of the shining brilliance of live cercariae, without them becoming shrivelled, granular and semi-opaque, as occurs when cercariae die spontaneously or are killed with heat. This is apparently the first report of abnormal cercariae of S. mattheei. In addition, a method of concentrating abnormal cercariae after emergence from a snail, a schematic classification of abnormal cercariae and a method for killing and fixing cercariae while retaining much of the shiny brilliance of live cercariae are also reported for the first time as far as is known. 相似文献