全文获取类型
收费全文 | 413篇 |
免费 | 31篇 |
专业分类
林业 | 15篇 |
农学 | 25篇 |
基础科学 | 3篇 |
42篇 | |
综合类 | 39篇 |
农作物 | 6篇 |
水产渔业 | 24篇 |
畜牧兽医 | 260篇 |
园艺 | 8篇 |
植物保护 | 22篇 |
出版年
2023年 | 4篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 6篇 |
2018年 | 13篇 |
2017年 | 11篇 |
2016年 | 14篇 |
2015年 | 6篇 |
2014年 | 7篇 |
2013年 | 28篇 |
2012年 | 14篇 |
2011年 | 8篇 |
2010年 | 18篇 |
2009年 | 16篇 |
2008年 | 18篇 |
2007年 | 14篇 |
2006年 | 13篇 |
2005年 | 13篇 |
2004年 | 9篇 |
2003年 | 13篇 |
2002年 | 7篇 |
2001年 | 14篇 |
2000年 | 7篇 |
1999年 | 7篇 |
1998年 | 14篇 |
1997年 | 5篇 |
1996年 | 14篇 |
1995年 | 7篇 |
1994年 | 5篇 |
1993年 | 6篇 |
1992年 | 12篇 |
1991年 | 17篇 |
1990年 | 9篇 |
1989年 | 14篇 |
1988年 | 9篇 |
1987年 | 7篇 |
1986年 | 5篇 |
1985年 | 3篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1979年 | 5篇 |
1978年 | 3篇 |
1975年 | 2篇 |
1972年 | 2篇 |
1971年 | 4篇 |
1969年 | 3篇 |
1967年 | 5篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1962年 | 1篇 |
排序方式: 共有444条查询结果,搜索用时 15 毫秒
41.
Serotypes of Erysipelothrix rhusiopathiae in Australian pigs, small ruminants, poultry, and captive wild birds and animals 总被引:1,自引:0,他引:1
Serotypes of 93 Australian isolates of Erysipelothrix rhusiopathiae from diseased domestic animals and poultry and a variety of captive wild birds and animals were determined by double diffusion gel precipitation. Two isolates, from the faeces of a swallow were also examined. Serotypes 1a, 1b and 2 were isolated from pigs and serotypes 1a, 1b, 2, 5, 15 and 21 from sheep or goats. Erysipelas in poultry was attributed to serotypes 1b, 5, 15 and 16. In captive wild birds serotypes 1b, 5, 6, 8, 14, 21 and an isolate reactive with antiserum to strain Seehecht were associated with septicaemic deaths. Single isolates from tissues of a bilby (Macrotis lagotis), black rat (Rattus rattus), brown snake (Pseudechis australis) and a bandicoot (Isoodon macrouris) were classified as serotypes 4, 4, 7, and 10 respectively. Six isolates were not able to be typed. Serotype 1b was the most widely distributed and most common (28%), being associated with disease in pigs, sheep, poultry and wild birds. Serotypes 1a or 2 were found in a more restricted range of animals, being commonly associated with erysipelas in pigs, less commonly in sheep and infrequently in other species. From diseased pigs, 26 of 33 isolates (79%) were serotypes 1a and 1b. 相似文献
42.
An infection with second-stage larvae of the warble-fly H. diana in a horse is described. The second-stage larvae were incapable of developing into the third stage, because horses are unsuitable hosts and because the infected horse was treated with an insecticide. Since the horse was used for dragging trees in the forests, the infection was likely contracted via contact with H. diana, a normal parasite of roe deer in the Netherlands. 相似文献
43.
Paulo MJ van der Voet H Jansen MJ ter Braak CJ van Klaveren JD 《Pest management science》2005,61(8):759-766
Risk assessment of pesticides can be a statistically difficult problem because pesticides occur only occasionally, but they may occur on multiple components in the diet. A Bayesian statistical model is presented which incorporates multivariate modelling of food consumption and modelling of pesticide measurements which are for a large part below a measurement threshold. It is shown that Bayesian modelling is feasible for a limited number of food components, and that in a data-rich situation the model compares well with an empirical Monte Carlo modelling. 相似文献
44.
Retained foetal membranes in dairy herds in the Huntly district 总被引:4,自引:0,他引:4
K Moller P E Newling H J Robson G J Jansen J A Meursinge M G Cooper 《New Zealand veterinary journal》1967,15(7):111-116
45.
46.
47.
SUMMARY To test the hypothesis that joint incongruity contributes to the pathogenesis of elbow osteochondrosis, the left and right radius and ulna of 20 young large breed dogs were measured to determine any variation in length and to observe any incongruity of the elbow joint. Both lame and normal dogs were included in the study. Nine of the 20 dogs had marked disparity in radial and ulnar lengths yet only one had obvious elbow joint incongruity. The use of a sliding osteotomy for the treatment of fragmented coronoid process and a lengthening osteotomy for the treatment of an ununited anconeal process is also discussed. All four dogs treated with a sliding osteotomy showed a marked clinical improvement, and two of the three dogs treated with a lengthening osteotomy showed radiographic fusion of the anconeal process. 相似文献
48.
49.
MJ STUDDERT 《Australian veterinary journal》1994,71(10):351-351
50.
de Jager et al. (Reports, 24 June 2011, p. 1551) concluded that mussels Lévy walk. We confronted a larger model set with these data and found that mussels do not Lévy walk: Their movement is best described by a composite Brownian walk. This shows how model selection based on an impoverished set of candidate models can lead to incorrect inferences. 相似文献