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1.
Barry Mc Inerney Gerard CorkeryGashaw Ayalew Shane WardKevin Mc Donnell 《Computers and Electronics in Agriculture》2011,77(1):1-6
The feasibility of using GS1 DataMatrix (GS1 DM) barcodes laser printed onto the beaks of poultry as a possible method of identification and, therefore, traceability of the individual were examined in this study, including a preliminary live trial on layer hens. The optimal laser type and settings for this particular application had been selected during previous in vitro and in vivo trials. GS1 DM barcodes were printed on both sides of the beaks of mature layer hens and read using a high specification camera based 1-Dimensional/2-Dimensional (1-D/2-D) DataMan 7500 barcode reader. The reading procedure was repeated on a number of occasions over a 5 week period to examine the effects of time in a commercial environment on the clarity and readability of the GS1 DM barcode, and the ability of the printed GS1 DM barcodes to resist the physical and chemical challenges of such a setting. The results show a very short timeframe during which all barcodes, both right and left combined, remain readable. Thereafter the readability deteriorates rapidly, due to the growth and healing of the beaks of the layer hens. Results also show that there was no significant difference in the readability between GS1 DM barcodes printed on the right or left side of the beak. The proportion of identification (ι) (i.e. number of layers identifiable by either one or two readable GS1 DM barcodes) was also calculated. All layer hens were fully identifiable for a seven day period by either one or two readable GS1 DM barcodes. Further analysis showed that the proportion of identification (ι) was significantly higher for layer hens when identified with two GS1 DM barcodes as opposed to just one. Secure movement control of live mature poultry at vulnerable points in the food chain, such as transfer of ownership, could well be facilitated by the use of this technology, thereby preventing fraud or substitution at these points. 相似文献
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Barry Mc Inerney Gerard Corkery Gashaw Ayalew Shane Ward Kevin Mc Donnell 《Computers and Electronics in Agriculture》2010,73(2):112-117
A preliminary study on the potential application of electronic tracking in poultry in vivo has been conducted. The experimental procedure for this study was based on previous in vitro findings (Fröschle et al., 2009) as part of the same research programme. The study consisted of two phases whereby an initial experiment using inkjet printing of 10 × 10 DataMatrix barcodes onto the beaks of broiler chickens in a live commercial setting has been carried out. Results demonstrated very poor percentage of readability after a short period of time. Barcodes deteriorated very rapidly and this was attributed to the physical effects on the barcodes of the actions of the chickens in a commercial environment, together with the inability of the ink to bond to the hard keratinous surface of the beak. In a subsequent part of the study, a number of commercially available ink types were screened, using a predetermined abrasion testing procedure, for their ability to bond to the beak and provide a readable barcode on the beaks following some predetermined graduated physical abrasion. 相似文献
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我国是禽流感多发地区,重大禽流感疫情对家禽产业的市场供求有着重大的影响。本文基于1998年1月-2014年12月肉鸡产业链以及蛋鸡产业链的月度价格数据,以我国内地已发生的三次重大禽流感疫情为背景,运用误差修正模型分析了历次禽流感疫情冲击对家禽产业链各产品价格的影响程度,并基于有向无环图(DAG)技术以及历史分解方法分析了禽流感疫情发生后各个产品价格之间的动态关系。研究表明:肉雏鸡价格对禽流感疫情最为敏感,跌幅最高可达27%,蛋雏鸡次之;在禽类之间传播的禽流感疫情对家禽产业具有短期冲击效应,当发生人感染禽流感疫情时,家禽产业至少需要13个月恢复至原有价格水平;疫情发生后,活鸡、肉雏鸡价格下降分别对禽肉和鸡苗价格下跌的贡献程度最大,而鸡肉和鸡蛋价格的率先上涨推动了禽肉市场的恢复。在此基础上提出了适时启动鸡苗补贴、推广冷鲜鸡肉消费习惯、加强银保合作等应对禽流感疫情风险的政策建议。 相似文献
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试验研究了玉米豆粕型日粮中添加酵母核酸对肉鸡生长性能和胴体组成的影响.320羽Avian公母混合雏按饲养试验要求分为4组,对照组饲喂基础日粮,试验各组在基础日粮中分别添加0.05%、0.1%和0.2%酵母核酸.饲养试验结束(42日龄)后进行屠宰试验,并测定胴体组成.结果表明:添加不同水平的酵母核酸能显著提高了日增重5.92%～7.36% (P<0.05),0.05%组的胰腺率和腺胃率与对照组相比分别提高了21.16% (P<0.05)、45.75% (P<0.05),对于胴体组成、其它内脏器官重等指标无明显影响. 相似文献
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交叉喙是多基因控制的复杂性状，目前已在全球至少12个鸡种中报道，包括商业品种和地方品种。交叉喙鸡刚出壳时喙形正常，但在随后1~2个月内逐渐呈现上下喙交错、咬合不全的交叉状态。交叉喙严重影响个体采食和饮水、降低生产性能、损害动物福利。交叉喙以下喙偏离中线为主，原因是单侧下颌骨支发育缓慢，LOC426217、BMP4、FIGNL1基因和脂蛋白脂肪酶、清蛋白等与该性状的发生相关。综述了鸡交叉喙表型特征、遗传方式和分子调控机制等方面的研究进展，以期为深入解析该性状的遗传基础和降低发病率提供借鉴。 相似文献
6.
蛋公鸡和肉鸡蛋白消化酶活性及饲料氨基消化率的比较研究 总被引：6，自引：0，他引：6
试验选用成年海兰褐种公鸡和 4周龄艾维因商品代肉公鸡 ,用 Sibbald“TME”法测定豆粕、棉粕、菜粕氨基酸消化率和强饲 3种蛋白饲料后胰腺、小肠食糜蛋白消化酶比活 ,结果表明 :蛋公鸡和肉仔鸡饲料氨基酸消化率除豆粕组肉仔鸡显著高于蛋公鸡 (P<0 .0 5)外 ,棉粕、菜粕 2组没有显著差异 (P>0 .0 5)。蛋公鸡和肉仔鸡蛋白消化酶比活除菜粕组蛋公鸡胰腺胰蛋白酶原比活显著高于肉仔鸡外 (P<0 .0 5) ,豆粕、棉粕组蛋公鸡和肉仔鸡蛋白消化酶比活没有显著差异 (P>0 .0 5)。 相似文献
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SHI Bao-ming SHAN An-shan CHAN Long 《东北农业大学学报(英文版)》2005,12(2):122-125
An experiment was conducted to study the response of broiler to diet dilution during the finishing period. Sixty 29-day-old commercial Avian male broiler chicks were assigned to two groups randomly, with 30 broilers each. Birds were offered a conventional finishing diet or with 10% dilution diet with ground rice hulls from 29 to 49 days of age. The result showed that there were no significant differences between the effects of diet dilution and the control on final body weight, growth rate and feed conversion efficiency. Diet dilution led to a reduction in abdominal fat weight, whereas carcass and breast muscle weight were not affected. 相似文献
9.
氨气对肉鸡生产性能的影响 总被引：1，自引：0，他引：1
为探讨畜舍内有害气体对畜禽生产性能的影响,以舍内主要有害气体氨气为主要研究指标,肉鸡为实验动物,研究氨气对肉鸡生产性能的影响。选择1日龄AA鸡、科宝鸡和三黄鸡各140只,将各品种随机分成4个处理组(氨气浓度水平不同),分别饲养在4个独立的、环境可控的实验舱内。4个环控仓环境除氨气浓度不同外,其余温度、湿度等生态环境条件及饲养管理方式完全相同。各仓氨气浓度通过感应器自动控制,4个环控仓氨气浓度分别为:0～21日龄时分别为0、10、25和60mg/m3,28～42日龄时分别调整为0、15、45和90mg/m3。研究表明:0～21日龄时,氨气浓度对肉鸡的日采食量和日增质量无显著影响(p0.05),但高氨组(60mg/m3)饲料转化率显著降低(p0.05);28～42日龄时,高氨组(90mg/m3)的日增质量、日采食量和饲料转化率均显著降低(p0.05)。与对照组相比,分别下降8.20%、7.60%和4.30%。以万只规模鸡场计算,约造成毛重收益损失2万元(以毛重价格7.6元/kg计算)。实验表明,肉鸡在0～21日龄舍内氨气浓度应不超过10mg/m3,在28～42日龄时应不超过15mg/m3。 相似文献
10.
集约化养鸡场舍内细菌气溶胶群落结构研究 总被引：1，自引：1，他引：1
为了给评价禽舍内生物气溶胶的危害提供基础数据,对笼养和网上养殖两种方式下,集约化养殖鸡舍内细菌气溶胶的浓度进行检测,并利用变性梯度凝胶电泳(PCR-DGGE)对空气中全部细菌的群落结构进行对比分析.结果显示:笼养舍内细菌气溶胶浓度和生物多样性均高于网上养殖,相同养殖方式下,生物多样性随着鸡龄的增加而呈现减小趋势;鸡舍空气环境中优势细菌主要为拟杆菌门(Bacteroidetes)、变形菌门(Proteobacteria)和厚壁菌门(Firmicutes),其中笼养和网上养殖舍内细菌气溶胶的优势菌属分别为Enterobacter和Escherichia. 相似文献
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随着人民生活水平的不断提高,对于肉类、蔬菜和水果的需求不断增加,商品鸡肉相对于传统养殖的家禽类鸡肉更能符合人们的需求。就商品肉鸡的各种特性,探讨商品鸡肉越来越被重视的原因,研究针对这些特性而需要的种种养殖关键技术,进行优劣势的分析。将较好的养殖技术应用于生产中,改善不利于肉鸡健康生长的技术缺点,达到最佳的养殖效果。 相似文献
13.
Digital image analysis to estimate the live weight of broiler 总被引：2，自引：0，他引：2
Md. Bazlur R. Mollah Md. A. Hasan Md. A. Ali 《Computers and Electronics in Agriculture》2010,72(1):48-52
Computer assisted digital image analysis was performed to investigate the possibility of estimating body weight of live broiler. To achieve the stated objective, 100 Arbor acres broiler chicks were reared under standard rearing condition and 1200 digital images were captured from 20 randomly selected broilers during the 7-42 days growing period. The captured images were analyzed by raster image analysis software (IDRISI 32) to determine the broiler body surface area and developed a linear equation to estimate weights of the broiler from its body surface-area pixels. The developed weight predicted equation based on surface-area pixels was log W = 1.060406(log P) + 0.173756(log A) − 2.029268 (W = estimated body weight, P = surface-area pixels and A = age at weighing) and the degree of goodness of fit of this equation was 0.999. The relative error in weight estimation of broiler chicken by image analysis, expressed in terms of percent error of the residuals from surface-area pixels was in between 0.04 and 16.47. On the other hand, the estimated body weights were not significantly (p > 0.05) difference from manually measured body weights up to 35 days of age. Thus, the development of a practical imaging system for weighing live broiler is feasible. 相似文献
14.
为了探讨肉用仔鸡在育雏期最佳的光照制度,本试验利用3000只美国爱拔益加AA肉用仔鸡,在自行设计的间歇光照制度及低光照强度的环境中(1 L:3 D,3 lux),观测不同时期实施控光对肉用仔鸡生产性能的影响。试验结果表明:肉仔鸡育雏期(7日龄)时实施控光的第一组(1 L:3 D,3 lux)比21日龄时实施控光的第二组(1 L:3 D,3lux)出栏群平均个体重提高4.70％(P>0.05),饲料利用率提高6.67％;比第三组(24L、25 lux)出栏群平均个体重提高11.36％(P<0.05),饲料利用率提高20.85％。证明,肉仔鸡在育雏期(7日龄)开始实施人工控光,综合效益显著。 相似文献
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海马具有重要的药用和观赏价值，但因其可供鉴定的形态特征较少，应用形态学对海马进行种水平的鉴定时经常会遇到很多困难。DNA条形码技术为海马物种鉴定提供了重要的鉴定方法。通过检索生命条形码数据库（BOLD）和GenBank数据库中海马的DNA条形码信息，应用MEGA软件计算海马种间遗传距离，分析DNA条形码在海马物种鉴定中的应用效果。结果表明，COI基因条码可以有效鉴别大部分种以上阶元的海马，但对亲缘关系较近的海马难以获得准确的鉴定结果。还有一些海马尚无相关的基因信息，也无法通过基因条形码进行鉴别。因此，应用DNA条形码鉴定海马物种尚有一定的局限性。 相似文献
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《东北农业大学学报(英文版)》2016,(1):28-34
To investigate the effects ofMoringa oleifera leaf meal (MOLM) on the performance and haematology of broiler finisher using 120 Cobb chicks of 4 weeks old broiler chicks. The birds were assigned randomly into four dietary treatments containing MOLM at 0, 6%, 8%, and 10% (treatments 1, 2, 3 and 4) inclusion levels, respectively, in a complete randomized design experiment. The effect of the dietary treatments on the growth performance and blood parameters of the broiler finisher was determined. MOLM at a rate of 6% (T2), 8% (T3), and 10% (T4) of the diets (as fed basis) to replace 3.2%, 5.6% and 8.6% of the crude protein (CP) of the control diet. The daily feed, dry matter and CP intake of the chicks fed MOLM diets were higher (p<0.05) than those fed the control diet. Average weight gain (AWG) of birds fed MOLM diets reduced as inclusion levels increases (p<0.05) than those fed the control diet. Chicks fed T2 showed higher (p<0.05) AWG than those on T3 and T4. Feed conversion ratios (FCR, weight gain/g and feed intake) were higher for chicks fed MOLM. MOLM showed minimal deleterious effects in birds. However, birds fed T2 (6%) diets recorded significantly (p<0.05) the highest body weight gain. There were significant differences (p<0.05) among groups in packed cell volume (PVC) of birds. The haemoglobin (Hb), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) counts showed no significant difference (p>0.05) among treatments. The results indicated that at 10% in the diets of broiler finisher chick, MOLM could be substituted with expensive conventional protein sources without any deleterious effects on performance and blood parameters of broiler finisher chicken. 相似文献
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为筛选出适合兜兰属植物的DNA条形码序列。本研究基于GenBank中下载的29种兜兰属植物的253条序列,利用遗传距离法及分子系统学方法分析兜兰属植物候选条形码。结果表明,在选取的3个候选序列片段中对兜兰属植物鉴定的成功率最高的是核糖体ITS(nrITS)序列,分辨率为62.96%,其次是叶绿体matK序列,分辨率为50%,最后是叶绿体rbcL序列,分辨率仅为21.43%,因此,本研究推荐nrITS序列作为兜兰属植物的DNA条形码候选序列,叶绿体matK序列作为补充序列。 相似文献
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SHI Baoming SHAN Anshan CHAN Long 《东北农业大学学报(英文版)》2006,13(2):140-144
Genetic selection in meat-type chickens has pro- vided the industry with flocks which reach the target slaughter weight in a shorter period of time. The in- crease in growth rate of modern broiler hybrids has been associated with increased fat deposition[… 相似文献
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试验选用270羽公母混合雏鸡,随机分成3组,研究了酶制剂对肉鸡胴体组成和钙磷代谢的影响.结果表明,酶制剂显著提高了肉鸡胸肌率,降低了血清磷水平和碱性磷酸酶活性,同时研究发现血清碱性磷酸酶活性与肉鸡生长呈极强的负相关. 相似文献
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选用1日龄艾维茵肉仔鸡360只,雌雄各半,随机分为6个处理,每个处理6个重复,每个重复10只鸡。试验组在基础日粮中分别添加0.05%,0.1%,0.2%,0.3%的棉籽低聚糖和0.1%氟哌酸,观察对肉仔鸡生长性能和抗氧化能力的影响。结果表明：添加0.1%棉籽低聚糖和抗生素可显著提高肉仔鸡1～42 d增重（P〈0.01）,添加0.3%棉籽低聚糖可显著提高肉仔鸡1～21 d,1～42 d增重（P〈0.01）。添加0.1%,0.2%,0.3%棉籽低聚糖可显著提高23日龄肉仔鸡血浆总抗氧化能力（P〈0.05）。添加0.05%棉籽低聚糖可显著提高42日龄肉仔鸡血浆总超氧化物岐化酶（T-SOD）的活力（P〈0.05）,显著降低血浆丙二醛（MDH）含量（P〈0.05）。添加0.2%棉籽低聚糖和抗生素的处理组可显著提高肉仔鸡42日龄血浆过氧化氢酶（CAT）的活力（P〈0.01）。 相似文献