全文获取类型
收费全文 | 170篇 |
免费 | 20篇 |
专业分类
林业 | 9篇 |
农学 | 1篇 |
17篇 | |
综合类 | 5篇 |
农作物 | 1篇 |
水产渔业 | 37篇 |
畜牧兽医 | 119篇 |
植物保护 | 1篇 |
出版年
2024年 | 2篇 |
2023年 | 2篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 5篇 |
2017年 | 8篇 |
2016年 | 15篇 |
2015年 | 5篇 |
2014年 | 12篇 |
2013年 | 29篇 |
2012年 | 12篇 |
2011年 | 6篇 |
2010年 | 8篇 |
2009年 | 7篇 |
2008年 | 7篇 |
2007年 | 2篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2002年 | 1篇 |
2000年 | 2篇 |
1998年 | 3篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1986年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 7篇 |
1976年 | 1篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1966年 | 1篇 |
1963年 | 2篇 |
1960年 | 3篇 |
1951年 | 1篇 |
排序方式: 共有190条查询结果,搜索用时 15 毫秒
81.
A.N. Bruere B.V.SC. PH.D. M.R.C.V.S. 《New Zealand veterinary journal》2013,61(8):173-174
Extract Sir,—I should like to make a request to interested veterinarians for live specimens of the rare condition in sheep — testicular feminization. 相似文献
82.
Renata G. Souza Danielle Karla A. Silva João Ricardo G. Oliveira Bruno T. Goto Fábio Sérgio B. Silva Everardo V.S.B. Sampaio Leonor C. Maia 《Pedobiologia》2012,55(6):303-309
The exploitation of minerals from coastal dunes in northeastern Brazil requires subsequent revegetation for ecosystem recovery. In mined dunes areas, we have compared the growth of Guazuma ulmifolia and Tabebuia roseo-alba seedlings using substrates containing 10 or 15% of cattle manure, uninoculated or inoculated with a mixture of native arbuscular mycorrhizal fungi (AMF) or exotic AMF (Acaulospora longula). The inoculated plants had a higher percentage of colonization than those that were uninoculated. Plants of G. ulmifolia had the highest growth when inoculated with native AMF and fertilized with 10% manure or inoculated with A. longula and fertilized with 15% manure. In general, fertilization with 15% manure did not produce greater seedling development and had a negative effect on the effectiveness of the symbiosis. Twenty one AMF species were recorded in the planting areas at the end of the experiments, with a predominance of species that form acaulosporoid spores in areas with T. roseo-alba and gigasporoid spores in areas with G. ulmifolia plants. The incorporation of 10% cattle manure and native AMF in the substrate of T. roseo-alba and G. ulmifolia seedlings contributes to the initial establishment of plants in the field and to the incorporation of AMF propagules in the soil of the revegetated mined dunes. 相似文献
83.
Sampaio Fernando Antônio Rebouças Teixeira Filho Marcelo Carvalho Minhoto da Silva Oliveira Carlos Eduardo Jalal Arshad Boleta Eduardo Henrique Marcandalli de Lima Bruno Horschut Rosa Poliana Aparecida Leonel Galindo Fernando Shintate de Souza Jeferson Silva 《Journal of Crop Science and Biotechnology》2021,24(4):429-439
Journal of Crop Science and Biotechnology - The rhizobacteria of genus Azospirillum and Bacillus are effective at fixing atmospheric nitrogen, promote plant growth and can largely contribute to... 相似文献
84.
Thiago Luís Magnani Grassi Dayse Lícia Oliveira Natália Mingues Paiva Juliana Campos Pereira Diniz Anelise Maria Bosco Ariana Aparecida Ferreira Pereira Amanda Regina Pinatti Menezes Taiana Carvalho Valadares Rosemeire Conceição Parra Pastor Paulo César Ciarlini Giovani Sampaio Gonçalves Morris Villarroel Elisa Helena Giglio Ponsano 《Aquaculture Research》2018,49(8):2881-2890
Microbial biomass (MB) produced by different industries is thought to be a beneficial supplement in fish feed due to high contents of antioxidants and pigments. However, little is known about their impact on fish health. In this experiment, 960 tilapia (26.84 ± 1.03 g) were fed one of eight experimental diets—a control diet with no MB (C), a control diet with vitamin E (VE) and six diets with three types of MB at two concentrations (0.25% and 0.5%): Rubrivivax gelatinosus (RG25 and RG50), Spirulina platensis (SP25 and SP50) and Saccharomyces cerevisiae (SC25 and SC50). Adding MB to diets decreased plasma total oxidant status, malonaldehyde and leucocyte respiratory burst; increased the total antioxidant status; and did not affect the blood biochemical parameters. In flesh, the use of the MB lowered the thiobarbituric acid‐reactive substances and increased redness (except for SC) and carotenoid deposition (except SC25). So, it was concluded that the use of the MB provided an antioxidant effect in tilapia blood plasma, decreased lipid oxidation and increased pigmentation and carotenoid deposition in the fish flesh, without imparting a negative impact on the animals’ health. 相似文献
85.
Sampaio Claudia B. Detmann Edenio Paulino Mario F. Valadares Filho Sebastiao C. de Souza Marjorrie A. Lazzarini Isis Rodrigues Paulino Pedro V. de Queiroz Augusto C. 《Tropical animal health and production》2010,42(7):1471-1479
The effects of supplementation with nitrogenous compounds on intake, digestibility, and microbial protein synthesis in cattle
fed low-quality tropical forage were assessed. Five rumen fistulated crossbred Holstein × Gir heifers were used, with initial
average live weight of 180 ± 21 kg. Signal grass (Brachiaria decumbens) hay (48.6 g kg−1 of crude protein (CP), on a dry matter (DM) basis) was used as roughage. Five treatments were defined according to nitrogen
supplementation level (0, 20, 40, 60, and 80 g of CP kg−1 above the CP level of the hay). A mixture of urea, ammonium sulfate, and albumin at the ratios of 4.5:0.5:1.0, respectively,
was used as nitrogen source. The experiment consisted of five experimental periods, according to a 5 × 5 Latin square design.
The average CP contents in the diets were 51.9, 71.1, 86.0, 116.7, and 130.2 g kg−1, on a DM basis. A quadratic effect was detected (P < 0.10) of the CP levels in the diets on DM and neutral detergent fiber intake (kg/day), with maximum response at the levels
of 102.4 and 100.5 g CP kg−1 DM, respectively. The average daily concentration of rumen ammonia nitrogen showed increasing linear pattern (P < 0.01) as function of CP levels in the diet, with estimated value of 9.64 mg dL−1 equivalent to the maximum DM intake. Microbial nitrogen flow in the intestine was linearly and positively related (P < 0.01) with the CP levels in the diet. 相似文献
86.
Everardo Sampaio Peter Gasson Amelia Baracat David Cutler Frans Pareyn Kleber Costa Lima 《Forest Ecology and Management》2010
Allometric equations have been developed for various different vegetation types but have rarely been validated in the field and never for dry tropical forest such as caatinga. In three areas of semi-arid Brazil, with regenerating caatinga vegetation, we measured and weighed twelve hundred individuals of four tree species and used the data to validate equations previously determined in mature caatinga. They and several other equations developed for tropical vegetations overestimate the biomass (B) of trees from the regeneration areas by more than 20%, possibly because these trees have reduced crowns, with lower branch masses. We then determined new allometric equations for them, validating equations for one site against data of the others and pooling the data if they were cross-validated. The best equations were power ones, based on diameter at breast height (D), with little improvement by including height, crown area and/or wood density (Caesalpinia pyramidalis, B = 0.3129D1.8838; Croton sonderianus, B = 0.4171D1.5601; Mimosa ophthalmocentra, B = 0.4369D1.8493; and Mimosa tenuiflora, B = 0.3344D1.9648 and 0.4138D1.7718). 相似文献
87.
88.
Effects of ascorbic acid 2‐glucoside and alpha‐tocopherol on the characteristics of equine spermatozoa stored at 5°C
下载免费PDF全文
![点击此处可从《Animal Science Journal》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Breno Fernandes Barreto Sampaio Bruno Gomes Nogueira Maria Inês Lenz Souza Eliane Vianna da Costa e Silva Carmem Estefânia Serra Neto Zúccari 《Animal Science Journal》2018,89(10):1415-1423
The aim of this experiment was to evaluate the effects of adding ascorbic acid 2‐glucoside (AA2G), a water‐soluble antioxidant and stable derivative of ascorbate, to the semen extender and compare it to the addition of vitamin C (Vit. C) and the fat‐soluble antioxidant α‐tocopherol (α‐Toh), both individually and in combination, on the seminal variables of equine sperm submitted to cooling for 72 h. We used two ejaculates from 10 stallions and evaluated them for motility, membrane integrity, chromatin fragmentation, mitochondrial activity and lipid peroxidation. In the analysis of lipid peroxidation, the control group showed 2506.2 ± 796.4 ng malondialdehyde/108 sperm, which was higher (P < 0.05) than the groups treated with antioxidants. The average value of motility in the AA2G group was 68.4 ± 18.1%, which was higher (P < 0.05) than that observed in the control group (62.1 ± 16.2%). The variables membrane integrity, chromatin fragmentation and mitochondrial activity did not show significant difference (P > 0.05) between treatments. It was concluded that the antioxidants protected sperm cells from lipid peroxidation and that AA2G was effective during the cooling process of equine semen at 5°C for72 h, providing increased levels of total motility. 相似文献
89.
Ricardo Souza Vasconcellos Karina Nogueira Venturelli Gonalves Naida Cristina Borges Francisco Jos Albuquerque de Paula Júlio Carlos Canola Mrcia de Oliveira Sampaio Gomes Tnia Zia Miltenburg Aulus Cavalieri Carciofi 《Journal of animal physiology and animal nutrition》2019,103(5):1546-1555
Body composition and energy requirements are different between males and females in several species, and both interfere with weight loss. The aim of this study was to compare the total and regional body composition and energy requirements in obese male (n = 8) and female (n = 8) cats, during weight loss and weight maintenance over 17 subsequent weeks after regimen. The total and regional (thoracic and pelvic limbs, and trunk) body composition was assessed by dual‐energy X‐ray absorptiometry (DXA). Females exhibited a higher fat mass (FM) than males (p < 0.05), and the trunk was the site with greater fat accumulation regardless of gender. A 23.0 ± 2.8% reduction in body weight was followed by a 50.3 ± 9.4% and a 37.0 ± 8.9% reduction in fat in the trunk region in males and females respectively. Lean mass (LM) mobilization was also increased in the trunk (p < 0.05), and the loss of LM was associated with a reduction in bone mass. The energy intake to achieve the same rate of weight loss was 12.9 ± 3.4% higher in males (p < 0.05). The cats exhibited a gradual increase in energy requirements to maintain their body weight after weight loss (p < 0.05). It was concluded that obese cats mainly accumulate fat in the trunk. The reduction in lean mass after the regimen also occurred in the trunk, with no modifications in the skeletal muscle mass of the limbs. Neutered male cats have higher energy requirements than neutered females, and gender should be considered during obesity management in cats. 相似文献
90.
Marilene de Farias Brito Alessandra dos Santos Belo-Reis José Diomedes Barbosa Daniel Guimarães Ubiali Ana Paula de Castro Pires Elizabeth Sampaio de Medeiros Renata Pimentel Bandeira de Melo Pedro Paulo Feitosa de Albuquerque Elise Yamasaki Rinaldo Aparecido Mota 《Tropical animal health and production》2016,48(7):1497-1501