全文获取类型
收费全文 | 5257篇 |
免费 | 493篇 |
国内免费 | 2篇 |
专业分类
林业 | 16篇 |
农学 | 23篇 |
51篇 | |
综合类 | 31篇 |
农作物 | 10篇 |
水产渔业 | 31篇 |
畜牧兽医 | 5563篇 |
园艺 | 8篇 |
植物保护 | 19篇 |
出版年
2024年 | 7篇 |
2023年 | 93篇 |
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 171篇 |
2019年 | 11篇 |
2018年 | 126篇 |
2017年 | 142篇 |
2016年 | 98篇 |
2015年 | 144篇 |
2014年 | 233篇 |
2013年 | 253篇 |
2012年 | 204篇 |
2011年 | 224篇 |
2010年 | 178篇 |
2009年 | 262篇 |
2008年 | 164篇 |
2007年 | 114篇 |
2006年 | 92篇 |
2005年 | 101篇 |
2004年 | 161篇 |
2003年 | 160篇 |
2002年 | 174篇 |
2001年 | 165篇 |
2000年 | 126篇 |
1999年 | 118篇 |
1998年 | 172篇 |
1997年 | 179篇 |
1996年 | 160篇 |
1995年 | 161篇 |
1994年 | 139篇 |
1993年 | 151篇 |
1992年 | 179篇 |
1991年 | 149篇 |
1990年 | 187篇 |
1989年 | 131篇 |
1988年 | 114篇 |
1987年 | 146篇 |
1986年 | 54篇 |
1985年 | 79篇 |
1984年 | 82篇 |
1983年 | 80篇 |
1982年 | 35篇 |
1981年 | 11篇 |
1980年 | 5篇 |
1977年 | 3篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有5752条查询结果,搜索用时 15 毫秒
991.
S. Rochelle Lewis Kurt ZimmermanJohn J. Dascanio VMD DACT DABVP R. Scott PleasantSharon G. Witonsky DVM PhD DACVIM 《Journal of Equine Veterinary Science》2009
A 15 year-old Thoroughbred mare was examined for lethargy, fever, and inappetence of 1-day duration. A hard-bodied tick was removed from the horse. A complete blood count (CBC) demonstrated leukopenia with lymphopenia and thrombocytopenia. Morulae were visualized in circulating granulocytes. A polymerase chain reaction (PCR) confirmed the identity of these organisms as Anaplasma phagocytophilum. The horse was treated symptomatically for fever and inappetence with flunixin meglumine (1.1 mg/kg [0.5 mg/lb]) and oral electrolyte paste. Oxytetracycline (6.6 mg/kg [3 mg/lb] intravenously every 24 hours) treatment was begun as soon as a definitive diagnosis was determined. The mare responded to treatment, but she was switched to oral doxycycline (10 mg/kg [4.5 mg/lb] every 12 hours) after 5 days because of perivascular swelling at the injection site. Complete resolution of clinical signs was seen. There was no evidence of recurrence 1 year later. No additional horses at the farm were affected. The horse in this report presented for lethargy, inappetence, and fever, with limited other abnormalities. This represents a classical presentation of a mild to moderate case of anaplasmosis, which had not previously been reported in Virginia. The disease may be more widespread than has been previously reported, and it should warrant inclusion on a complete differential diagnosis list in a case of fever of unknown origin. 相似文献
992.
993.
994.
Brachycephalic feline noses: CT and anatomical study of the relationship between head conformation and the nasolacrimal drainage system 总被引:1,自引:1,他引:0
995.
Steven J Cooke Cory D Suski Robert Arlinghaus Andy J Danylchuk 《Fish and Fisheries》2013,14(4):439-457
Traditional regulatory options (formal institutions) imposed by government agencies such as harvest and gear restrictions represent the standard in recreational fisheries management, at least in developed countries. However, there exist a number of alternatives including the use of angler education programmes that attempt to evoke voluntary changes in angler behaviour, resulting in the emergence of voluntarily motivated resource‐conserving informal institutions. These ‘softer’ approaches to aquatic stewardship and fisheries management can be developed in cooperation with stakeholders and in many cases are led by avid anglers and angling groups. Examples of such measures include voluntary sanctuaries, informally enforced seasonal closures, personal daily bag limits, self‐imposed constraints on gear, development of entirely live‐release fisheries, and adoption of fish and aquatic ecosystem conservation‐oriented gears and release practices. Education efforts that provide anglers with knowledge on best practices and empower them to modify their behaviour hold great promise to meet formal management goals and objectives, but seem to be underutilized relative to formal regulations. This article highlights the benefits and challenges of relying on informal institutions as alternatives to traditional regulatory options. Informal institutions that protect resources and help overfished stocks recover hold great promise in both developed and developing countries, particularly when there is a single stakeholder group or when the capacity to enforce traditional regulations or to invest in stock assessments is limited. Informal institutions may help make formal institutions more effective or can even be alternatives to costly institutions that depend on enforcement to be effective. 相似文献
996.
Retrospective evaluation of 155 adult equids and 21 foals with tetanus in Western,Northern, and Central Europe (2000–2014). Part 1: Description of history and clinical evolution
下载免费PDF全文
![点击此处可从《Journal of Veterinary Emergency and Critical Care》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Gaby van Galen DVM PhD DECEIM DECVECC Claude Saegerman DVM PhD DECVPH Joke Rijckaert DVM Helene Amory DVM PhD DECEIM Lara Armengou DVM PhD DECEIM Barbora Bezdekova DVM PhD DECEIM Inge Durie DVM DECEIM Rikke Findshøj Delany DVM Nathalie Fouché DVM DVM Laura Haley MVB Michael Hewetson BVSc DECEIM Rene van den Hoven DVM PhD DECEIM Anna Kendall DVM DECEIM Fernando Malalana DVM DECEIM MRCVS Jessika Muller Cavalleri DVM DECEIM PhD Tresemiek Picavet DVM DECEIM PhD Katja Roscher DVM DECEIM Denis Verwilghen DVM PhD DECVS Meret Wehrli Eser DVM DECEIM Cornélie Westermann DVM PhD DECEIM Tim Mair BVSc PhD DECEIM 《Journal of Veterinary Emergency and Critical Care》2017,27(6):684-696
997.
998.
Retrospective evaluation of the impact of early enteral nutrition on clinical outcomes in dogs with pancreatitis: 34 cases (2010–2013)
下载免费PDF全文
![点击此处可从《Journal of Veterinary Emergency and Critical Care》网站下载免费的PDF全文](/ch/ext_images/free.gif)
999.
1000.