共查询到20条相似文献，搜索用时 671 毫秒
1.
2.
云南养猪业的发展，在省委、省政府的正确领导和精心培育下，制定政策，增加投入，重视科技，推广综合配套技术等措施，夯实了发展基础，充分调动了广大科技人员和养殖户的积极性，使云南养猪生产连续27年持续增长，极大地推动了农村经济的发展，促进了农民增收，从20世纪90年代初彻底改变了肉食不能自给的被动局面，近年来不仅巩固了肉食自给的成果，而且自给有余，每年都有大量商品猪外销，使云南养猪生产进入了新的发展阶段。 相似文献
3.
我市生猪定点屠宰推行１年来，由于政策合理，措施得力，顺民心，得民意，得到了四个满意。一是人民群众吃上了“放心肉”，“满意肉”，人民满意；二是政府税费增加，为老百姓办了件大好事，大实事，树立了政府的良好形象，政府满意；三是企业生产启动，机械化生产线得到充分利用，职工上了岗，有活干，有饭吃，企业满意。四是检疫队伍充分发挥了作用，集中检疫，效果好了，跑路少了，收费多了，动检部门满意。 市区这次生猪定点屠宰工作之所以能稳步推进，得益于一个目标（确保人民群众吃上“放心肉”）把握的好，四条原则（谁的权利谁行… 相似文献
4.
5.
利用犬温热，细小病毒性肠炎，犬传染性肝炎，狂犬病等弱毒株，以香菇多糖和动物的核糖，多肽做为免疫增强剂，对异源动物羊，猪，犊牛，家兔进行了免疫应答，筛选出了猪做为异源免疫动物。在免疫增强剂的参与下，完成了多次免疫应答，达到了理想的免疫球蛋白（ＩｇＧ），通过试验摸清了该制剂的免疫程序，确定了生产工艺，经重复性试验，稳定性试验及含量测定，以及临床应用试验和现志应用试验均达以了预期效果，该制剂经冷冻干燥后 相似文献
6.
盱眙县发掘资源优势，把龙虾作为特色产业，举办中国龙虾节，带动了一系列相关产业的发展，改变了当地的农业产业结构和就业结构，增加了就业和收入，增强了地方经济实力；并通过特色产业的品牌效应，带动了旅游等服务业的发展，吸引了外来投资，加速了工业化进程。通过总结盱眙县的经济发展实践，为落后地区的区域经济发展提供了参考和借鉴。 相似文献
7.
8.
一、困境及成因 长期以来，一论及四川藏区贫困的基本因素，人们往往会振振有词地归结为两大方面：一是地理因素的制约，导致交通不便，信息闭塞；二是历史的沉淀，导致问题诸多，积重难返。人云亦云，听多了，背熟了，明知为政多年，山河依旧，也引以为常，见贯不听；看多了，见久了，浑晓百姓贫困，食不裹腹，仍不思进取，心安理得。 果真如此吗？我带着这个问题，走遍了全县的山山水水，对白玉县的方方面面作了深入的调查研究。坚持从实际出发，区分层次，有的放矢，注意实效；坚持解放思想、实事求是，深入农牧户，‘听实话，查实情，调… 相似文献
9.
10.
11.
Kothapalli KS Kirkness EF Vanwormer R Meyers-Wallen VN 《Veterinary journal (London, England : 1997)》2006,171(3):559-561
DMRT1, which encodes a zinc finger-like DNA binding motif, is a well-conserved gene that is involved in testis differentiation in a variety of mammalian and non-mammalian vertebrates. The objective of this study was to determine whether a DMRT1 microsatellite marker allele is associated with the affected phenotype in a pedigree of canine SRY-negative XX sex reversal generated from an American Cocker spaniel founder. Ten affected dogs and their parents and grandparents were genotyped. Four alleles at this locus and five different genotypes were found in this pedigree. All affected dogs inherited this trait from the foundation sire of this colony. Thus, the disease-causing mutation should be identical by descent in all affected dogs. Six affected dogs were found to have genotypes at this locus that were different from those of the founder sire. These results indicate that DMRT1 is an unlikely candidate gene for SRY-negative XX sex reversal in this model. 相似文献
12.
13.
14.
Genetic parameters for faecal nematode egg count were estimated in naturally infected Barbari goats maintained at the Central Institute for Research on Goats, Makhdoom, Mathura, India, over a period of 5 years (1999 through 2003). Faecal egg count (FEC) data on 891 records of Barbari goats descended from 69 bucks and 241 does were used in this study. Analyses were carried out by restricted maximum likelihood (REML), fitting an animal model and ignoring or including maternal genetic or permanent environmental effects. Three different animal models were fitted. Direct heritability estimates were inflated substantially for this trait when maternal effects were ignored. The direct heritability estimates for the trait ranged from 0.05 to 0.13 depending on the model used. Low (0.04) maternal heritability estimate was observed for this trait in our study. Moderate estimate of the fraction of variance due to maternal permanent environmental effects (c(2)) for faecal egg count (c(2)=0.10) was also observed. Results suggest that direct and permanent environmental maternal effects were important for this trait, however, maternal additive effects had less impact on this trait. 相似文献
15.
The objective of this research was to develop a prototype system for national cattle evaluation that would facilitate selection for improved fertility of daughters from Hereford sires. Raw data for this analysis were the birth dates of calves as reported by breeders to the American Hereford Association. Records from females entered this analysis with the reporting of a birth date for their first calf. At that time, females were required to be in contemporary groups of at least 3 animals and to have at least 2 additional paternal half-sibs also represented in the data. To explicitly define "sustained reproductive success," the philosophy taken was that a female that maintained a calving interval of 425 d or less would be considered successful. Females failing to meet this criterion were considered to be at the end of their successful lifetime. Data were analyzed using methodology for survival analysis with grouped data. Fixed contemporary groups were modeled as being time dependent, reflecting the females exposed for breeding in the same herd-year-season. Sire effects were time independent and considered random. Also included in the analysis were time-independent covariates for maternal weaning weight and total maternal calving ease from the national cattle evaluation of the American Hereford Association. Records from females still successfully in production at the time of this analysis, those that were transferred, those with calving intervals less than 280 d, and those that were successful until becoming donor dams for embryo transfer were considered censored. A total of 36,866 females contributed to this analysis, with 14,143 of these having censored records. The median number of females in a contemporary group was 6. A total of 3,323 sires had daughters with records. The median number of daughters per sire was 7. Heritability of sustained reproductive success on the underlying scale estimated from these data was approximately 0.05. Additional data accumulated over time will improve this genetic evaluation. Sustained reproductive success is important to the commercial beef industry, and results from this evaluation are expected to enhance the assessment of economic value of Hereford seedstock. 相似文献
16.
用纯化的猪伪狂犬病病毒gB重组蛋白为抗原,建立了检测猪伪狂犬病血清抗体的gB-ELISA方法。最佳反应条件为：抗原包被浓度为3.15μg/mL,待检血清稀释度为1∶40。该方法对猪圆环病毒病、猪瘟、猪细小病毒病、猪繁殖与呼吸综合征（猪蓝耳病）、猪乙型脑炎、猪布氏杆菌病5种疾病阳性血清和SPF猪阴性血清检测呈阴性反应。批间、批内试验变异系数均不超过8%。用该方法与HerdChek ELISA试剂盒同时对119份血清进行了平行检测,其相对敏感性、特异性和符合率分别为：75%、80.7%和79%。试验结果表明：猪伪狂犬病血清抗体gB-ELISA检测方法具有较高的敏感性和特异性,且重复性好,可用于猪伪狂犬病毒血清抗体检测。 相似文献
17.
Belbacha I Hafid J Tran Manh Sung R Flori P Raberin H Aboufatima R Regragui A Dalal A Chait A 《Schweizer Archiv für Tierheilkunde》2004,146(12):561-564
Toxoplasma gondii is an ubiquitous parasite with a prevalence variable from country to country. In Morocco very few studies were devoted to this prevalence. To fill this gap we were interested to study the epidemiology of this parasite and to know the level of carriage by the different vectors which are the sources of contamination in humans. The study was done by directly detecting the cysts in the cerebral tissue of the 50 sheep killed and destined for consumption. The results of this preliminary study show that 30% of the cases carry the cysts of T. gondii. To confirm this result and verify the virulence, cerebral specimens were inoculated into mice. These findings are encouraging to complete this study with serological tests and to look for the parasite in cows and goats of this region. 相似文献
18.
简要概述了牧草遗传转化方向及牧草转基因所取得的主要贡献,介绍了牧草遗传转化三种方法,并就今后的发展前景和转基因育种生物安全问题做了初步探讨。 相似文献
19.
不同饲喂模式对奶牛采食和瘤胃发酵的影响 总被引：3，自引：0，他引：3
为采用4头体重(600±50)kg、装有永久性瘤胃瘘管的中国荷斯坦经产奶牛进行试验,比较传统精粗分开饲喂向全混合日粮(TMR)转换时泌乳奶牛的采食、瘤胃发酵及生产性能的变化。试验动物所用日粮组成在整个试验期完全相同。前17 d采用精粗饲料分开饲喂的模式,后13 d则采用TMR进行饲喂。在由传统的精粗分开饲喂向TMR饲喂转换过程中,试验牛的日粮干物质采食量(DMI)、中型洗涤纤维进食量(NDFI)差异极显著(P<0.01),而与之相对应的采食时间差异不显著;全天的瘤胃pH值试验期前后比较无明显差异,但pH曲线但有趋于平稳的趋势,瘤胃中氨态氮浓度在试验期结束时差异极显著(P<0.01)。 相似文献