首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 78 毫秒
1.
针对当前新平县肉牛养殖业的发展状况展开调查,分析了新平县肉牛养殖业发展缓慢的主要制约因素,提出了加快新平县肉牛产业发展的建议,为加快新平县肉牛产业可持续性发展提供积极对策。  相似文献   

2.
笔者介绍了华宁县肉牛养殖业发展基础和制约发展的因素,并对华宁县肉牛养殖业发展提出建议。  相似文献   

3.
饲料产业一体化经营是肉牛养殖业推进的重要支持系统，其规模和发展水平直接影响着养殖业的潜力。据此，我们对河北省十一个养牛重点县进行了调查，结果显示：样本县中几乎每一个县都有１～３个规模较大的饲料加工企业，其肉牛养殖业起到了积极的推动作用。但同时也暴露出了许多问题，归纳起来主要有以下几个方面： 一饲草资源不足，山区县区位养殖优势不明显 在对山区样本县进行研究的过程中发现饲草资源不足，已成为制约山区县肉牛养殖业发展的一个主要因素。以赞皇县为例，全县８３８ｋｍ２的土地全部为山区，草山、草坡面积达５．９４万…  相似文献   

4.
建立以养牛业为主的畜牧业,是西方发达国家从传统农业进入现代农业的一个显著标志。也是我国加快农业发展,实现农民增收一条捷径。近几年来,由于东部山区发展肉牛生产资源丰富,肉牛生产发展有了新变化,肉牛养殖业由分散的传统饲养向集中规模饲养转变。但是我们应看到由于品种、饲养管理、产品加工,服务等因素影响,造成我们的肉牛发数量不少,产肉不多,质量不好。牛肉市场竞争力不强,使得肉牛生产发展缓慢。针对以上问题笔者经过调查,以宏观角度剖析认为:要使山区乡镇肉牛生产有一个新的大发展,必须建立一个模式,开发四个环节。1建立一个符合…  相似文献   

5.
通过对宁夏固原市肉牛产业发展现状和制约因素进行探讨和分析,提出了固原市肉牛养殖业适度规模化发展的建议,以期为当地肉牛产业实现健康、可持续发展提供理论依据。  相似文献   

6.
为了探讨新化县肉牛产业未来的发展路径和策略,文章对新化县肉牛产业现状进行全面的了解,分析了发展肉牛产业的三大优势和影响扩大规模生产的三大主要制约因素,并提出了通过弘扬梅山文化,打响湘中黑牛品牌;通过创新机制做强肉牛专业合作社,推广品种改良、发展草业、集中育肥、规范化饲养等科学技术;充分挖掘资源潜力,提高肉牛养殖效益,使新化县肉牛产业真正成为贫困地区农民脱贫致富的特色养殖业等一系列发展策略。  相似文献   

7.
基于对国内外肉牛产业发展的相关研究的梳理,通过系统全面分析了我国肉牛产业的演进过程和肉牛养殖业的发展现状,剖析了影响我国肉牛产业中的比较效益低、肉牛产业集约化体系尚未形成等制约因素,进而提出了加速我国肉牛产业化发展的五个对策建议。  相似文献   

8.
近年来,随着社会经济的快速发展,居民的消费结构发生了巨大变化,尤其对牛肉的消费量不断增加,使肉牛生产在数量上和规模上都得到了快速扩张,产业链不断完善。但目前我国肉牛产业发展仍处于初期阶段,面临着许多不利于肉牛养殖业可持续发展的问题,肉牛养殖的经济效益受到了影响。通过分析当前国内外肉牛产业发展现状,对我国肉牛产业发展的制约因素进行了探讨,并提出了相应的对策,以期为推动我国肉牛产业的可持续发展提供有益参考。  相似文献   

9.
正近年,肉牛的养殖在我市逐步形成市场,随着生活水平的不断提高,人们对牛肉的需求越来越多,促进了肉牛养殖业的迅速发展,肉牛的养殖规模化后饲养管理成为制约养殖业发展的关键,本文介绍了肉牛品种的选择、饲养管理和疾病预防,以期为肉牛的科学饲养提供依据。1品种的选择选择良好的肉牛品种是养牛业的关键,优良品种的生产性能可大幅度提高肉牛养殖的经济效益,日增重、产仔率、瘦肉率都是在选种时需要考量的因素。我市养殖较为适合的肉  相似文献   

10.
正新时期,随着居民生活质量的显著改善,市场对肉牛产品的需求量持续增加,推动了我国肉牛养殖业的发展。我国是世界上传统畜牧业国家,山区肉牛产业近些年发展迅速,但是受到疫病防治、饲养管理、养殖理念和肉牛品种等因素的影响,其产量提升缓慢,市场竞争力不强,不仅对养殖户的经济收入带来不利影响,同时也不利于山区地区经济发展。本文对山区肉牛养殖技术措施进行了分析供养职户借鉴。  相似文献   

11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。  相似文献   

12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.  相似文献   

13.
Tropical Animal Health and Production -  相似文献   

14.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

15.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

16.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

17.
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.  相似文献   

18.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

19.
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors.  相似文献   

20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号