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   56篇
  免费   3篇
  国内免费   1篇
农学   1篇
  1篇
综合类   4篇
农作物   1篇
畜牧兽医   48篇
植物保护   5篇
  2023年   1篇
  2021年   1篇
  2020年   3篇
  2018年   1篇
  2017年   1篇
  2016年   3篇
  2014年   3篇
  2013年   4篇
  2012年   1篇
  2011年   1篇
  2009年   1篇
  2007年   1篇
  2006年   3篇
  2005年   1篇
  2003年   1篇
  2002年   1篇
  2001年   1篇
  2000年   1篇
  1999年   3篇
  1998年   4篇
  1997年   5篇
  1995年   3篇
  1994年   3篇
  1993年   5篇
  1992年   3篇
  1991年   1篇
  1990年   3篇
  1989年   1篇
排序方式: 共有60条查询结果,搜索用时 31 毫秒
41.
中西医结合防治鸭传染性浆膜炎   总被引:1,自引:0,他引:1  
鸭传染性浆膜炎即鸭疫里默氏杆菌病,是严重危害鸭生产的主要传染病之一。根据病鸭的流行病学、临床症状、剖检症状及实验室诊断,确诊为鸭传染性浆膜炎。采取中西医综合防治措施,取得较好疗效。  相似文献   
42.
43.
44.
45.
46.
47.
AIMS: To review results of the ventral approach for mandibular and sublingual sialoadenectomy for the treatment of sialocoeles associated with the mandibular and sublingual salivary glands in the dog, and to determine rates of recurrence and complication following this procedure.

METHODS: Thirty-nine dogs with 41 sialocoeles that underwent surgical intervention were retrospectively evaluated with respect to signalment, aetiology, location of sialocoeles, duration of clinical signs, treatment prior to referral, post-operative use of antibiotics and drains, complications, and recurrence.

RESULTS: The mean age at the time of surgery was 5.1 (SD 3.8) years, and duration of clinical signs 6.6 (SD 10.6) months. Long-term follow-up was available for 31 dogs; the minimum was 8 months and mean 47.7 (SD 25.8) months post-surgery. There was no recurrence of sialocoeles following the ventral approach for mandibular and sublingual sialoadenectomy. Post- operatively, 6/35 (17%) cases developed a seroma at the surgical site. No breed or sex predisposition was determined. The cause of the sialocoele was unknown in 36/41 (88%) cases.

CONCLUSIONS AND CLINICAL RELEVANCE: Excellent clinical results were achieved with a low rate of complications using the ventral approach for mandibular and sublingual siaload- enectomy. The ventral approach is recommended to minimise the risk of recurrence of sialocoeles.  相似文献   
48.
Knowledge about reproduction is critical for predicting the viability of wildlife populations in nature and for managing breeding programmes in captivity. Intensive species-based studies are the priority, because reproductive mechanisms are extraordinarily diverse, even within the same taxonomic family. Carnivores deserve more attention as such species are highly vulnerable to environmental change and human persecution. The present review provides contemporary illustrations of how reproductive science is contributing to understand unique reproductive mechanisms that are both of fundamental and applied interest. In the case of the endangered African wild dog ( Lycaon pictus ) free-living in South Africa, non-invasive faecal corticosteroid assessments have yielded new insights about the impact of animal relocation and reintroduction on adaptive responses, reproductive fitness and survival. For the maned wolf ( Chrysocyon brachyurus ), advances have been made in characterizing and comparing reproductive traits in free-ranging vs captive individuals. For the cheetah ( Acinonyx jubatus ), recent studies have focused on the cryosensitivity of sperm and the ability to develop a field-friendly sperm cryo-method. The by-product has been a large-scale frozen repository of sperm from wild-caught cheetahs useful for infusing new genes into ex situ populations. Finally, rigorous, multi-disciplinary and cross-institutional reproductive studies of the black-footed ferret ( Mustela nigripes ), including the use of artificial insemination, have contributed to the remarkable recovery and restoration of this species, once on the brink of extinction. In summary, advances in reproductive science are not necessarily related to 'assisted breeding'. However, understanding the unique ways of carnivore reproduction greatly contributes to species management and conservation.  相似文献   
49.
The aim of the present work was to evaluate the breed and season effects on scrotal circumference (SC) and semen characteristics of 28 mature hair sheep rams kept under tropical conditions. SCs, sperm concentration (SPC) and abnormal sperm were significantly affected by breed effect (p < 0.001). The season effect was significant in SPC (p < 0.0001) while ejaculate volume, mass motility and SPC were affected by breed × season interaction effect (p < 0.001). It can be concluded that the magnitude of the breed and season effects were not sufficient to affect the reproductive capacity of hair sheep rams throughout the year.  相似文献   
50.
紫外分光光度法测定氟苯尼考及其注射液的含量   总被引:1,自引:0,他引:1  
采用紫外分光光度法测定氟苯尼考原料药及其注射液的含量。实验结果表明,在0.05~0.5 mg/mL浓度范围内,氟苯尼考的吸光度与浓度呈现良好的线性关系(r=0.9997,n=6);与法定的高效液相色谱法检测结果无差异。  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