全文获取类型
收费全文 | 707篇 |
免费 | 41篇 |
专业分类
林业 | 59篇 |
农学 | 33篇 |
基础科学 | 6篇 |
133篇 | |
综合类 | 25篇 |
农作物 | 36篇 |
水产渔业 | 97篇 |
畜牧兽医 | 278篇 |
园艺 | 21篇 |
植物保护 | 60篇 |
出版年
2024年 | 1篇 |
2023年 | 13篇 |
2022年 | 28篇 |
2021年 | 40篇 |
2020年 | 55篇 |
2019年 | 32篇 |
2018年 | 47篇 |
2017年 | 38篇 |
2016年 | 39篇 |
2015年 | 24篇 |
2014年 | 44篇 |
2013年 | 56篇 |
2012年 | 66篇 |
2011年 | 42篇 |
2010年 | 38篇 |
2009年 | 27篇 |
2008年 | 24篇 |
2007年 | 30篇 |
2006年 | 29篇 |
2005年 | 20篇 |
2004年 | 13篇 |
2003年 | 15篇 |
2002年 | 6篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1991年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有748条查询结果,搜索用时 15 毫秒
741.
Samara N. C. Vicentini Priscila S. Casado Giselle de Carvalho Silvino I. Moreira Adriano F. Dorigan Tatiane C. Silva Abimael G. Silva Adriano A. P. Custódio Ana Carolina S. Gomes João L. Nunes Maciel Nichola Hawkins Bruce A. McDonald Bart A. Fraaije Paulo C. Ceresini 《Plant pathology》2022,71(2):304-321
Wheat blast is one of the most important and devastating fungal diseases of wheat in South America, South-east Asia, and now in southern Africa. The disease can reduce grain yield by up to 70% and is best controlled using integrated disease management strategies. The difficulty in disease management is compounded by the lack of durable host resistance and the ineffectiveness of fungicide sprays. New succinate dehydrogenase inhibitor (SDHI) fungicides were recently introduced for the management of wheat diseases. Brazilian field populations of the wheat blast pathogen Pyricularia oryzae Triticum lineage (PoTl) sampled from different geographical regions in 2012 and 2018 were shown to be resistant to both QoI (strobilurin) and DMI (azole) fungicides. The main objective of the current study was to determine the SDHI baseline sensitivity in these populations. Moderate levels of SDHI resistance were detected in five out of the six field populations sampled in 2012 and in most of the strains isolated in 2018. No association was found between target site mutations in the sdhB, sdhC, and sdhD genes and the levels of SDHI resistance, indicating that a pre-existing resistance mechanism not associated with target site mutations is probably present in Brazilian wheat blast populations. 相似文献
742.
743.
Bernardo M. M. N. Borges Matheus Sampaio C. Barreto Paulo S. Pavinato Henrique C. J. Franco João Luís Nunes Carvalho Mathias Strauss Saran Sohi 《European Journal of Soil Science》2023,74(4):e13400
Innovation is required on many fronts in agriculture, not only to improve nutrient use efficiency but also to mitigate the effects of climate change. Our previous studies presented the high agronomic efficiency of an experimental phosphate fertilizer using a biochar-matrix, called ‘BioFert’. However, the efficiency of BioFert for soil carbon sequestration goals has not yet been evaluated. We incubated BioFert and initial raw sugarcane-biochar over 56 days in two soils (i.e., Ferralsol and Alisol) and measured the total CO2 and δ13C-CO2 to quantify the contribution of native soil organic matter, sugarcane-biochar, or BioFert to carbon mineralization. There was no significant difference in cumulative CO2 release between BioFert and the control (without carbon addition), and BioFert was less mineralized than carbon from sugarcane-biochar regardless of soil type. In addition, accelerated aging by thermal oxidation of these carbon sources revealed that more than 80% of BioFert-carbon was prevented from accelerated mineralization, while sugarcane-biochar achieved ~80% of carbon mineralization. The residual solids after oxidation were analysed by X-ray photoelectron spectroscopy and indicated aliphatic/aromatic and carboxylic chemical bonds on the BioFert surface, which might offer new cation exchange sites over time. We conclude that BioFert is not only a phosphate fertilizer with high phosphorus use efficiency but also a stable source of carbon for soil carbon sequestration purposes. 相似文献
744.
Paulo Roberto Campagnoli de Oliveira Filho Paulo José do Amaral Sobral Julio César de Carvalho Balieiro 《Journal Of Aquatic Food Product Technology》2017,26(3):325-334
This study compares how CO2 narcosis and thermal shock affect the physicochemical aspects of Nile tilapia fillets held frozen (?18°C) for up to 6 months. The characteristics of tilapia fillets subjected to CO2 narcosis were those of higher lightness and whiteness and lower redness. The hardness values of fillets of tilapia subjected to thermal shock were lower than those subjected to CO2 narcosis. During frozen storage to both treatments, the drip loss, denaturation of myosin, and lipid oxidation increased, while fillet water holding capacity and hardness decreased. The physicochemical properties of frozen fillets of tilapia stunned by CO2 narcosis were considered more desirable; therefore, the method can be a potential replacement to thermal shock. 相似文献
745.
Sybuia Priscila Ayumi de Castro-Prado Gabriela de Carvalho Nunes William Mário Zanutto Carlos Alexandre Kaneshima Edilson Nobuyoshi Soares Dartanhã José da Silva Franco Claudinéia Conationi de Freitas Mathias Paulo Cezar de Castro-Prado Marialba Avezum Alves 《European journal of plant pathology / European Foundation for Plant Pathology》2022,163(4):937-950
European Journal of Plant Pathology - Charcoal rot is an economically important fungal disease of economically important crops. Several species of the Macrophomina genus, such as M.... 相似文献
746.
747.
748.
Lenir Fátima Gotz Nerilde Favaretto Gabriel Barth Paulo Sergio Pavinato Volnei Pauletti 《Soil Use and Management》2023,39(1):606-617
The benefits of manure as a source of nutrients for plants and to improve soil quality are well-known. Monitoring of manure application is needed if environmental issues are to be prevented. In particular, the availability and accumulation of phosphorus (P) has to be subject to rigorous monitoring. This study aims to both evaluate the efficacy of the resin method in extracting inorganic labile P in soils under the long-term application of dairy liquid manure (DLM), and verify the influence of DLM on the recovery of applied P and soil legacy P. To realize our objectives, two long-term field experiments were established under a no-tillage system with annual DLM application on sandy clay loam (sandy Oxisol) and clayey (clayey Oxisol) soils. Treatment consisted of DLM applications (0, 60, 120, 180 m3 ha−1 year−1), independent of mineral fertilizer. Soil samples were taken from the 0–5, 5–10 and 10–15 cm layers after 10 years from the beginning of the trial. A single extraction with resin underestimated inorganic labile P; however, successive extractions were able to take up 43% and 26% of the total P in sandy and clayey Oxisols, respectively, whereas in a single extraction the take-up was 17% and 8% from the same soils, respectively. The resin method was more effective in extracting P from the sandy Oxisol. Thus, when interpreting soil P contents for fertilizer planning, the soil texture should be taken into account. DLM application decreased P recovered from applied P, ranging from 54% to 83% (sandy), and 43% to 67% (clayey), and substantially increased soil legacy P. 相似文献