美国的小水电建设与发展

本文从开发利用小水电的历史演变过程和小水电的潜能与发展前景以及对发展小水电政策等方面对美国小水电的建设进行了综述,以期为我国小水电建设提供参考。     

Babesia canis rossi infection in a Texas dog

A 5-month-old intact male Boerboel dog, imported from South Africa 1 week previously, was presented to a Texas veterinarian for lethargy, anorexia, and labored breathing. The dog was febrile, anemic, leukopenic, thrombocytopenic, and slightly azotemic. Results of the IDEXX SNAP-4Dx enzyme immunoassay were negative for Dirofilaria immitis antigen and antibodies against Ehrlichia canis, Borrelia burgdorferi, and Anaplasma phagocytophilum. An EDTA blood sample analyzed at Oklahoma State University Center for Veterinary Health Sciences revealed nonregenerative anemia, neutropenia, and large protozoal piroplasms in 0.7% of the RBCs. Piroplasms were 2-5μm long and varied in shape from round to oval to piriform; extracellular merozoites were also observed. Nested PCR was performed on DNA extracted from blood using primers that amplify the 18s rRNA gene from all known Babesia species, and the product was sequenced. Basic Local Alignment Search Tool analysis of the 437 base sequence revealed 99-100% similarity to Babesia canis rossi, 92-93% similarity to Babesia canis canis, and 92% similarity to Babesia canis vogeli. The dog responded well to treatment with imidocarb. PCR analysis of a second blood sample 2 weeks later was negative for Babesia spp. DNA. This case represents the first diagnosis of B. canis rossi infection in the United States.     

中美核桃业之差距与对策

现阶段我国核桃与美国核桃在产量、质量、出口量等方面均存在较大差距。其根本原因在于我国核桃良种率低 ,经营规模小而分散 ,管理粗放 ,加工处理技术落后 ,生产、加工、销售严重脱节。因此 ,应充分发挥自然资源优势 ,重点建立高标准的优质核桃生产基地 ,进行老园改造 ,开发我国的名、特、优品牌 ;积极引进消化国外先进技术和经营管理经验 ,加大投资力度 ,加强科学研究 ,改善生产设施 ,提高经营者素质 ;扶持培育龙头企业 ,参与市场竞争 ,实施产业化开发 ;发挥区位优势 ,开拓国内外市场     

American Wine Society

This article describes the digitization of the Alabama Agricultural Experiment Station publications. This collection forms part of the United States Agricultural Information Network (USAIN) National Preservation Program for Agricultural Literature and the State and Local Literature Preservation Projects that are similar in scope to Cornell's Core Historic Literature of Agriculture digital collection. These are nationwide projects that seek to preserve scholarly literature in agriculture. Project planning and implementation is described, followed by a discussion of the potential usefulness of this collection and ways of promoting its use to various user groups.     

Environmental impact assessment as a management tool for the use of chemicals for fish farming in the UK

The paper begins by discussing the classification and use of chemicals for fish farming and the environmental impact assessment (EIA) regulations. EIA procedures for regulating chemicals through statutory authority are then discussed. Environmental assessment for fish farming can be a powerful management tool at both administrative and scientific levels.     

美国农民收入保障政策发展动态——基于2014和2008年农业法案对比

2014年美国颁布了农业新法案.为了研究并借鉴美国对农民收入保障政策,通过对比美国2014和2008年农业法案,发现2014年农业法案在对农业收入补贴的改革、农业风险保障、资源环境保护项目方面有了新的发展.美国农业政策的调整对我国农民收入政策发展的启示是:改善农业补贴政策效能,健全农业保险制度,完善农产品价格形成机制,加强农业生态治理.     

Camelina sativa,a short gestation oilseed crop with biofuel potential: Opportunities for Indian scenario

Camelina is an oilseed crop which is being commercially produced globally as feedstock for biodiesel. Being a non-edible oil bearing low input crop owing to its low fertilizer and water requirement, fits well for biofuel production. In India, targets for biofuel blending has been set by New Biofuel Policy-2018 and to meet these targets efforts are being made to harness the potential of available feedstock in the country. Among these feedstock, contribution of short gestation oilseed bearing crop has been very important. Camelina has been introduced in India during 2009–10 as experimental crop by DIBER, DRDO. Since then various efforts have made to standardize the production technology of this crop under various agro-climatic regions of the country, crop improvement, oil quality analysis and development of high energy by-products. Camelina has various advantages to offer for Indian biofuel sector. This paper reviews the potential of this crop for Indian Biofuel scenario.     

基于校园植物网的教学模式探索

为了提升植物学相关课程的教学效果,在对校园植物进行系统调查和资料整理的基础上,建设了图文并茂的河北联合大学校园植物网,用以指导教学实践。校园植物网显著提高了教学质量和学生的学习兴趣,并营造出了良好的校园文化氛围。     

2012年禽肉市场形势分析及未来展望

受消费不旺等因素影响,2012年中国禽肉整体价格水平低于2011年同期,呈先降后升趋势。由于肉鸡饲料、玉米以及豆粕等饲料原料价格持续上涨,养殖效益较2011年大幅下滑,同时饲料价格上涨对禽肉价格具有一定支撑作用。从国际市场看,2012年美国禽肉价格呈先降后升趋势,欧盟鸡肉价格先升后降,整体高于2011年同期。2013年全球禽肉价格预期上涨。受成本增加及消费预期增长影响,2013年中国禽肉价格预期总体将保持涨势。     

Methyl bromide alternatives for strawberry and tomato pre-plant uses: A meta-analysis

This paper reports the results of a meta-analytic synthesis of information from a large number of horticultural experiments that evaluated the technical feasibility of methyl bromide alternatives as soil fumigants in strawberry (Fragaria ananassa) cultivation in California, Florida, and Spain, and in tomato (Solanum lycopersicum) cultivation in Florida. A technically feasible alternative is defined as a treatment that provides pest control and crop yields similar to methyl bromide standard fumigation. We selected papers using five criteria, which jointly ensured inclusion of field experiments that contained usable information on at least three treatments—(1) an untreated control, (2) a methyl bromide treatment, and (3) a treatment that is an alternative to methyl bromide treatment. Because of the differences in regional cropping environments, we performed separate meta-analyses for four crop/region combinations. To explore the potential effects of missing information on past fumigation history and pest pressure on the results, we performed two sensitivity analyses, in which the set of usable field experiments included only those experiments in which the improvement of the methyl bromide treatment yield over the control yield was either 15% or 50%. Finally, the definition of several potential alternative chemical treatments took into account differences in formulations and application rates. The results we obtained do not support the technical superiority of methyl bromide over its alternatives. We found several potential alternatives for which we could not reject the hypothesis of technical feasibility, based on the experimental data for strawberries in California and Spain. In particular, the results on strawberry field experiments in California indicate that the estimated effect size of the treatment using 1,3-dichloropropene/chloropicrin 65:35 formulation (applied at the standard rate) was close to the estimated effect size for methyl bromide. The results from strawberry and tomato field experiments in Florida were inconclusive. However, this does not establish that methyl bromide is technically superior to its alternatives. Given the data-related limitations of the analysis, standard protocols are necessary for conducting and reporting the experiments to allow for more meaningful synthesis of the experimental data.