全文获取类型
收费全文 | 1018篇 |
免费 | 42篇 |
专业分类
林业 | 118篇 |
农学 | 24篇 |
基础科学 | 2篇 |
186篇 | |
综合类 | 123篇 |
农作物 | 42篇 |
水产渔业 | 50篇 |
畜牧兽医 | 452篇 |
园艺 | 11篇 |
植物保护 | 52篇 |
出版年
2021年 | 14篇 |
2020年 | 17篇 |
2019年 | 12篇 |
2018年 | 16篇 |
2017年 | 16篇 |
2016年 | 18篇 |
2015年 | 9篇 |
2014年 | 10篇 |
2013年 | 35篇 |
2012年 | 34篇 |
2011年 | 33篇 |
2010年 | 30篇 |
2009年 | 27篇 |
2008年 | 44篇 |
2007年 | 38篇 |
2006年 | 34篇 |
2005年 | 33篇 |
2004年 | 39篇 |
2003年 | 38篇 |
2002年 | 16篇 |
2001年 | 17篇 |
2000年 | 19篇 |
1999年 | 22篇 |
1998年 | 11篇 |
1994年 | 11篇 |
1992年 | 19篇 |
1991年 | 29篇 |
1990年 | 15篇 |
1989年 | 28篇 |
1988年 | 9篇 |
1987年 | 21篇 |
1986年 | 22篇 |
1985年 | 20篇 |
1984年 | 12篇 |
1982年 | 9篇 |
1980年 | 9篇 |
1979年 | 15篇 |
1978年 | 13篇 |
1977年 | 8篇 |
1976年 | 9篇 |
1975年 | 8篇 |
1974年 | 15篇 |
1973年 | 11篇 |
1972年 | 14篇 |
1970年 | 20篇 |
1969年 | 11篇 |
1968年 | 14篇 |
1967年 | 21篇 |
1966年 | 9篇 |
1936年 | 7篇 |
排序方式: 共有1060条查询结果,搜索用时 234 毫秒
991.
992.
993.
G B Hubbard R E Schmidt C A Gleiser W F MacKenzie 《American journal of veterinary research》1979,40(2):288-293
Effects of nutritional secondary hyperparathyroidism and dietary calcium supplementation on bone healing were determined. Groups (n = 4) of 5 mature male dogs each were fed the following diets: group 1, control diet (0.48% Ca, 0.43% P); group 2, test diet (0.12% Ca, 1.14% P): group 3, control diet plus calcium; group 4, test diet plus calcium. The dietary calcium supplementation was calcium gluconate. Lesions were induced in the right tibial cortex by trephinization. Within the time limitations of this study, it was determined that nutritional secondary hyperparathyroidism does not inhibit bone healing and that dietary calcium supplementation does not aid bone healing. 相似文献
994.
Everett Aronson DVM J. Craig Bendickson DVM Kristina. G. Miles DVM Loren D. Kintner DVM MS Donald A. Schmidt DVM PhD 《Veterinary radiology & ultrasound》1986,27(2):50-53
A cat was presented with a non-weight-bearing lameness of the left thoracic limb, painful joints and lymphadenopathy. Marked bilateral osteolysis of the distal radial and ulnar metaphyses was detected radiographically. A post mortem diagnosis of disseminated histoplasmosis and feline lymphosarcoma was made. 相似文献
995.
H Cohen C E Schmidt S R Lucas J L Palmer 《American journal of veterinary research》1975,36(10):1483-1487
Lymphoma developed in 6 neonatal pups inoculated with 1.0 to 2.06 X 10(9) cells of the 2nd in vivo passage of a canine lymphoma. Three to 4 weeks later (or 8 weeks after the pups had been inoculated), 3 of the 6 pups were started on a chemotherapeutic regimen consisting of vincristine, prednisone, and cyclophosphamide. Twelve to 19 days after combination chemotherapy was started, clinically efident lymphoma disappeared in the 3 pups. Period of treatment was 49 to 84 days. The dogs remained healthy and lymphoma was in complete remission approximately 2 years later. The 3 nontreated pups, used as controls, died of generalized lymphoma 45 to 86 days after inoculation. Seemingly, chemotherapy eradicated the bulk of the tumor, and the host immune response was capable of eliminating residual neoplastic cells. Also, transplanted canine lymphoma seems amenable to treatment and may be curable with combination chemotherapy--thus possibly serving as an experimental therapeutic model. 相似文献
996.
997.
998.
999.
A case of pre-renal azotaemia is described in a 12 year old pony resulting from oesophageal obstruction of 8 days duration. Blood urea nitrogen, creatinine, calcium, inorganic phosphate, sodium, potassium, chloride and bicarbonate concentrations were monitored throughout the recovery period. After relief of the obstruction normal blood concentrations were quickly restored. 相似文献
1000.
Parvovirus infection in maned wolves 总被引:1,自引:0,他引:1