全文获取类型
收费全文 | 203篇 |
免费 | 14篇 |
专业分类
林业 | 15篇 |
农学 | 10篇 |
55篇 | |
综合类 | 6篇 |
农作物 | 14篇 |
水产渔业 | 26篇 |
畜牧兽医 | 63篇 |
园艺 | 4篇 |
植物保护 | 24篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2022年 | 6篇 |
2021年 | 10篇 |
2020年 | 12篇 |
2019年 | 8篇 |
2018年 | 18篇 |
2017年 | 13篇 |
2016年 | 9篇 |
2015年 | 7篇 |
2014年 | 7篇 |
2013年 | 8篇 |
2012年 | 15篇 |
2011年 | 22篇 |
2010年 | 6篇 |
2009年 | 19篇 |
2008年 | 9篇 |
2007年 | 9篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 1篇 |
2002年 | 5篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有217条查询结果,搜索用时 375 毫秒
161.
162.
163.
Luiz Michele Angelo Senna Denise Padilha Felipe Gomes Ferreira Nogueira Willian Augusto Fonseca Ana Beatriz de Mello Marcela Freire Vallim Ferreira Ana Maria Reis 《Tropical animal health and production》2019,51(8):2145-2151
Tropical Animal Health and Production - The aim of this study was to perform linear measurements and assess morphometric indices of equines of the Pantanal race of different ages in the... 相似文献
164.
Aline E. Pinna Carolina T. C. Okada Camila S. C. Ferreira Diego G. Campos Karen S. Possidente Rita de Cssia C. L. Morais Marcela Oliveira Marcia Carolina Salomo Alexandre Hataka 《Reproduction in domestic animals》2019,54(6):912-916
Ovarian tumours in mares represent 2.5% to 6% of the most frequent neoplasms found in the equine species, with a higher chance of benignity. This study aims to describe a case of two different tumours found in the same ovary of a mare that presented clinical signs of suppressed oestrous cycle during 5 years. After unilateral ovariectomy, the ovary was sent to the histopathology examination which determined a mixed tumour of granulosa cell and leiomyosarcoma. After treatment, the mare returned to oestrus and got pregnant in the next season. 相似文献
165.
166.
Marcela M Luppi Marcelo C C Malta Maria E L T Costa Rafael O C Motta Renato L Santos 《Journal of zoo and wildlife medicine》2008,39(2):244-247
An 8-yr-old female paca (Agouti paca) was admitted at the Veterinary Hospital of the Belo Horizonte Zoo (Brazil) with an ulcerated cutaneous nodule of approximately 1.5 cm in diameter in the left ear. One week later, other cutaneous nodules were detected in various body locations. The animal died during a surgical procedure to remove the tumors. All cutaneous nodules were histologically similar with features of squamous cell carcinoma. Considering the predominant in situ nature of the lesion as well as its multicentric localization, the disease reported here closely resembles Bowen's disease, which has been described in humans and which has been identified as a rare neoplastic disease of cats, with one single report in a dog. This is the first report of a neoplastic disease in Agouti 相似文献
167.
Serum opsonization capacity, phagocytosis, and oxidative burst activity in neonatal foals in the intensive care unit 总被引:1,自引:0,他引:1
Gardner RB Nydam DV Luna JA Bicalho ML Matychak MB Flaminio MJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2007,21(4):797-805
BACKGROUND: Phagocytic activity of neonatal foals has been reported to be similar to that of adult horses, but serum opsonization capacity develops with age and may be further altered when opsonins are consumed during infection. HYPOTHESIS: Phagocytosis, oxidative burst activity, and serum opsonization capacity in neonatal foals admitted to an intensive care unit are reduced in comparison with control foals. ANIMALS: Blood samples were collected from hospitalized neonatal foals and from control foals. Hospitalized foals were characterized as sick or septic on the basis of a sepsis score and received intravenous plasma transfusion. METHODS: Phagocytosis, oxidative burst activity, and serum opsonization capacity were tested with flow cytometric analysis. Serum immunoglobulin and complement component 3 concentrations were determined with radial immunodiffusion. Serum amyloid A concentration was assayed with a commercially available solid-phase Sandwich ELISA Kit. Data were analyzed with nonparametric and regression methods. Alpha was set at P = .05. RESULTS: Phagocytic functions of septic and sick foals were lower than control foals in the initial phase of the study (P = .01). Opsonization capacity was significantly higher when bacteria were opsonized with serum from septic (P = .029) and sick (P = .006) foals than from control foals on day 1. Opsonization capacity in septic foals was comparable with control foals on days 2 and 5. This effect was not accompanied by an increase in serum complement C3 or immunoglobulin G concentrations independently. CONCLUSIONS AND CLINICAL IMPORTANCE: Our results suggest that phagocytic function could be decreased in hospitalized foals. The synergistic effect of opsonic elements provided by plasma transfusion may sustain opsonization capacity during sepsis. 相似文献
168.
Marcela de Almeida Contadini Fernanda Altieri Ferreira Rosana Ruegger Silva Corte Daniel Silva Antonelo Juan Fernando Morales Gómez Saulo da Luz e Silva 《Tropical animal health and production》2017,49(8):1709-1713
This study was carried out to evaluate the effects of chopped hay levels in high-concentrate diets with whole corn grain (WCG) on performance and carcass traits of finishing Nellore cattle. One hundred and eight 24-month-old Nellore intact males (453 ± 75 kg) were fed one of three WCG-based diets that differed in roughage level: without roughage (WCG), with 5% chopped hay included (WCG5), or with 12% chopped hay included (WCG12) in a block design (based on initial body weight) for 86 days. Animals fed WCG5 or WCG12 had significantly improved on final body weight, dry matter intake, average daily gain, feed efficiency, hot carcass weight, and dressing percentage when compared to those fed WCG. The Longissimus muscle area (P = 0.1108), backfat thickness (BFT; P = 0.6089), and rump fat thickness (P = 0.1798) were not affected by roughage levels. Therefore, using WCG diets without roughage negatively affects the performance of feedlot Nellore cattle but does not affect carcass traits and does lead to the minimum BFT required by the industry. 相似文献
169.
170.
Alexandre Pio Viana Fernando Higino de Lima e Silva Leonardo Siqueira Glória Rodrigo Moreira Ribeiro Willian Krause Marcela Santana Bastos Boechat 《Euphytica》2017,213(10):228
Sour passion fruit is an economically important tropical fruit crop with little explored genetic potential. This study aimed to provide breeders with essential estimates of genomic breeding values in economically important traits in passion fruit, using Bayesian models which may contribute to the implementation of Genomic Selection and develop new strategies for the continuity of sour passion fruit breeding programs. For this, the following Bayesian models were tested using 183 polymorphic marks: Bayesian Ridge regression, Bayes A, Bayes B, Bayes B2, Bayes Cπ and Bayesian Lasso for estimation of genomic breeding values. To achieve this, ninety-five full-sib progenies derived from the third cycle of recurrent selection of the sour passion fruit (Passiflora edulis Sims.) at Universidade Estadual do Norte Fluminense Darcy Ribeiro—UENF were used and eight fruit yield (number of fruit, total yield, mean fruit weight, fruit length, fruit width) and quality(percent pulp, skin thickness, soluble solids) traits were assessed. The Bayes Cπ (smaller deviance information criterion) yield the best genetic predictions for almost all traits. Genetic correlations in this study indicate that the number of fruit can be used as a proxy for yield. The values of genomic heritability obtained were high and ranged from 0.62 to 0.76 and predict accuracy ranged from 0.55 to 0.75, so we can to speculate that the use of two replicates in the present study was an adequate amount to obtain phenotypic mean, which was used to adjust the genomic prediction model. 相似文献