首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3104篇
  免费   196篇
  国内免费   4篇
林业   205篇
农学   79篇
基础科学   22篇
  515篇
综合类   763篇
农作物   70篇
水产渔业   244篇
畜牧兽医   1081篇
园艺   95篇
植物保护   230篇
  2024年   8篇
  2023年   20篇
  2022年   32篇
  2021年   71篇
  2020年   77篇
  2019年   91篇
  2018年   80篇
  2017年   81篇
  2016年   93篇
  2015年   71篇
  2014年   80篇
  2013年   115篇
  2012年   194篇
  2011年   231篇
  2010年   150篇
  2009年   97篇
  2008年   228篇
  2007年   217篇
  2006年   203篇
  2005年   195篇
  2004年   200篇
  2003年   189篇
  2002年   183篇
  2001年   36篇
  2000年   32篇
  1999年   31篇
  1998年   20篇
  1997年   8篇
  1996年   23篇
  1995年   14篇
  1994年   15篇
  1993年   10篇
  1992年   9篇
  1991年   12篇
  1990年   7篇
  1989年   14篇
  1988年   9篇
  1987年   17篇
  1986年   16篇
  1985年   13篇
  1984年   9篇
  1983年   7篇
  1982年   7篇
  1981年   4篇
  1980年   7篇
  1978年   4篇
  1976年   8篇
  1975年   5篇
  1974年   8篇
  1973年   6篇
排序方式: 共有3304条查询结果,搜索用时 15 毫秒
1.
Corneal diseases are common in domestic rabbits. It is important to carefully evaluate the cornea and the entire eye when rabbit present with clinical signs such as squinting, tearing, or conjunctival hyperemia. Complete ophthalmic examination and general physical examination should be performed on all rabbits with corneal disease. Important diagnostic testing include culture and sensitivity, cytology, and fluorescein staining. Breed predispositions do not occur for most corneal problems, although some diseases are selected genetically in research rabbits. Corneal disease can be a primary condition or can occur secondary to other ocular or systemic disease.  相似文献   
2.
3.
A cross-sectional study was done from March 2013 to May 2014 to assess knowledge, attitudes, and practices towards cystic echinococcosis (CE) or hydatidosis among selected pastoral and agro-pastoral communities in Uganda. A structured questionnaire was administered to 381 respondents. Multivariate logistic regression analysis was done to find the relationship between knowledge about CE and factors such as age, sex, and level of education across all regions. The odds ratio and confidence interval were used to determine the difference in responses across regions. It was shown that age above 36 years was significantly (p < 0.001) associated with awareness about CE in livestock. Likewise, uneducated (p < 0.0001) and agro-pastoralists (p = 0.01) were significantly less knowledgeable than the educated and pastoralists across all regions. The overall knowledge towards CE in livestock was low 17.8% (95% CI = 14.0–21.6). Dog ownership was high and they never dewormed their freely roaming dogs. Dogs shared water with livestock. In conclusion, knowledge about CE in livestock was low across all regions. Therefore, public health education and formulation of policies towards its control by the relevant stakeholders should be done. Also, the true prevalence of CE in livestock needs to be done so that the magnitude and its public health significance are elucidated.  相似文献   
4.
Studies have indicated the importance of business education in improving the income level attained by veterinarians and the quality of service they provide. The Veterinary Business Management Association (VBMA), a national organization of veterinary students, has the potential to augment veterinary curricula by providing additional education to help ensure professional success. Local chapters at 27 of the 28 veterinary colleges in the United States (as of 2007) supplement the curriculum by focusing on business topics. A national governing board oversees the chapters, helping to ensure that high-quality educational programs are conducted and providing a conduit for communication.  相似文献   
5.
A 2-year-old neutered male 35-kg golden retriever mixed breed dog was presented because of a 3-day history of increased respiratory effort. The patient was subsequently diagnosed with a lung lobe torsion and underwent lung lobectomy. Chylothorax developed after surgery and persisted for 3.5 y. Pleural access port (PAP) placement was used for long-term medical management. Several complications were encountered, including 2 episodes of PAP occlusion that were successfully treated with unfractionated heparin. The dog had a surgical site seroma and 2 episodes of pleuritis; euthanasia was elected after the second episode.Key clinical message:This case demonstrates successful long-term management of chylothorax with a pleural access port and management of 3 complications. Instead of the less accessible and more expensive tissue plasminogen activator, unfractionated heparin was used as an effective treatment for PAP occlusions.  相似文献   
6.
7.
8.
Five cases of canine keratomycosis were diagnosed and treated at a private Veterinary Ophthalmology Practice in Melbourne, Australia. Clinical presentations varied between dogs. Predisposing factors were identified in 4 of 5 cases. Diagnostic modalities utilized were corneal cytology and fungal culture. Corneal cytology confirmed the presence of fungal organisms in all five cases. Aspergillus, Scedosporium, and Candida were cultured from three cases, respectively. Specific antifungal treatment included 1% voriconazole solution or 1% itraconazole ointment. Keratectomy and conjunctival grafting surgery was performed in two patients. Resolution of infection and preservation of vision were achieved in 4 of 5 patients.  相似文献   
9.
10.
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