全文获取类型
| 收费全文 | 539篇 |
| 免费 | 48篇 |
专业分类
| 林业 | 12篇 |
| 农学 | 5篇 |
| 基础科学 | 1篇 |
| 34篇 | |
| 综合类 | 53篇 |
| 农作物 | 97篇 |
| 水产渔业 | 11篇 |
| 畜牧兽医 | 356篇 |
| 园艺 | 2篇 |
| 植物保护 | 16篇 |
出版年
| 2021年 | 6篇 |
| 2020年 | 6篇 |
| 2019年 | 6篇 |
| 2018年 | 13篇 |
| 2017年 | 10篇 |
| 2016年 | 9篇 |
| 2014年 | 7篇 |
| 2013年 | 30篇 |
| 2012年 | 18篇 |
| 2011年 | 10篇 |
| 2010年 | 13篇 |
| 2009年 | 11篇 |
| 2008年 | 22篇 |
| 2007年 | 21篇 |
| 2006年 | 16篇 |
| 2005年 | 15篇 |
| 2004年 | 10篇 |
| 2003年 | 17篇 |
| 2002年 | 13篇 |
| 2001年 | 17篇 |
| 2000年 | 15篇 |
| 1999年 | 12篇 |
| 1998年 | 7篇 |
| 1997年 | 5篇 |
| 1994年 | 5篇 |
| 1992年 | 13篇 |
| 1991年 | 9篇 |
| 1990年 | 6篇 |
| 1989年 | 11篇 |
| 1988年 | 10篇 |
| 1987年 | 12篇 |
| 1986年 | 9篇 |
| 1985年 | 10篇 |
| 1983年 | 8篇 |
| 1980年 | 5篇 |
| 1979年 | 7篇 |
| 1975年 | 6篇 |
| 1972年 | 5篇 |
| 1970年 | 5篇 |
| 1966年 | 5篇 |
| 1955年 | 8篇 |
| 1954年 | 5篇 |
| 1948年 | 5篇 |
| 1947年 | 4篇 |
| 1946年 | 6篇 |
| 1945年 | 10篇 |
| 1944年 | 5篇 |
| 1943年 | 5篇 |
| 1942年 | 4篇 |
| 1932年 | 4篇 |
排序方式： 共有587条查询结果，搜索用时 968 毫秒
1.
2.
3.
Thromboembolic meningoencephalitis (TEME) caused by Huemophilus somnus infection was diagnosed for the first time in New Zealand in an eight month old bull calf. Clinical signs included pyrexia, excessive salivation, recumbency, opisthotonus and rigidity of the front legs. Multiple red, malacic foci (1-10 mm in diameter) were visible grossly on the surface of the cerebrum and cerebellum, and were scattered throughout the brain parenchyma. Histologically these lesions consisted of focal haemorrhage, necrosis and neutrophilic infiltration. Fibrin thrombi and colonies of gram negative bacteria were present in many small blood vessels within necrotic foci. An organism with the morphological and biochemical characteristics of Haemophilus somnus was cultured from the brain. Although TEME is an important disease of feedlot cattle in North America and Europe it is relatively uncommon in cattle grazing pasture and is therefore unlikely to become a major problem in New Zealand. 相似文献
4.
5.
6.
P J Durham B C Farquharson B J Stevenson 《New Zealand veterinary journal》1979,27(12):266, 271-266, 272
7.
We describe the spatial epidemiology of Varroa destructor infestation among honey bee apiaries in the greater Auckland area of the North Island of New Zealand. The study population was comprised of 641 apiaries located within the boundaries of the study area on 11 April 2000. Cases were those members of the study population declared Varroa-infested on the basis of testing conducted between April and June 2000. The odds of Varroa was highest in apiaries in the area surrounding transport and storage facilities in the vicinity of Auckland International Airport. A mixed-effects geostatistical model, accounting for spatial extra-binomial variation in Varroa prevalence, showed a 17% reduction in the odds of an apiary being Varroa infested for each kilometre increase in the squared distance from the likely site of incursion (95% Bayesian credible interval 7–28%). The pattern of spatially autocorrelated risk that remained after controlling for the effect of distance from the likely incursion site identified areas thought to be ‘secondary’ foci of Varroa infestation initiated by beekeeper-assisted movement of infested bees. Targeted investigations within these identified areas indicated that the maximum rate of local spread of Varroa was in the order of 12 km/year (interquartile range 10–15 km/year). 相似文献
8.
Barriers to and enablers of implementing antimicrobial stewardship programs in veterinary practices 
下载免费PDF全文
下载免费PDF全文 9.
Survey of equine castration techniques,preferences and outcomes among Australian veterinarians 下载免费PDF全文
下载免费PDF全文 CD Owens KJ Hughes BJ Hilbert J Heller S Nielsen GD Trope 《Australian veterinary journal》2018,96(1-2):39-45
Objectives
(1) To collect the perceptions of veterinarians performing equine castrations in Australia on techniques, preferences and outcomes, (2) to investigate veterinarian use and experience with the Henderson castrating instrument and (3) to investigate potential associations between demographics, castration methods and techniques, and complications.Design
Online survey of members of the Australian Veterinary Association’s Special Interest Group, Equine Veterinarians Australia (EVA).Methods
A link to the survey was included in the EVA e‐newsletter and practices on the EVA website were contacted by telephone and follow‐up email. Fisher’s exact test was used to determine associations between ligation and complications. A generalised linear model with a negative binomial family was used to determine associations between count response variables and categorical independent variables.Results
Responses were obtained from 138 veterinarians (response rate, 13.1%) who performed 5330 castrations over 12 months. Castrations were most commonly performed in the field, on anaesthetised horses, using emasculators, via an open approach and without ligation of the spermatic cord. Estimated complications after use of emasculators were swelling (25%), haemorrhage (5%) and infection (5%). The Henderson instrument was used by approximately 10% of respondents and its use for castration was associated with fewer reports of postoperative swelling compared with emasculators (P = 0.002). Rates of evisceration with the Henderson and emasculator methods were comparable (0.43% and 0.9%, respectively).Conclusion
Castration preferences varied widely among survey participants. Reported complication types and rates were comparable to those reported previously in other countries. Perceptions that the Henderson instrument was associated with less swelling should be investigated further via a prospective controlled investigation. 相似文献10.