浅析林业育苗现状及容器育苗技术的应用与推广

我国林业领域不断发展的过程中，苗木需求量随之增加，这种情况下需要加大对育苗技术的 研究，提高林业种植效益。本文主要针对林业育苗现状和容器育苗技术的应用及推广进行研究，从林 业育苗需求出发，提出有效的育苗技术，并具体分析容器育苗方法，优化苗期管理方法，以便从技术层 面出发，实现我国林业种植领域的良好发展。     

Channel catfish,Ictalurus punctatus,nutrition in the United States: A historical perspective

Although a concerted effort in catfish nutrition research in the United States did not begin until the late 1950s/early 1960s, the genesis of both the catfish industry and catfish nutrition research is rooted in studies conducted early in the 20th century. Thus, a historical view delineating the progression of channel catfish, Ictalurus punctatus, nutrition from 1900 to the present is given. Notable nutrition research programs, as well as significant events and accomplishments, will be examined.     

创新方法在农业领域科研项目实施过程中的应用

本文基于创新方法在我国农业领域科研项目中的应用现状,总结概括了其在实施过程中不同的创新特征,以“七大作物育种为例”分析了创新方法应用过程中存在的问题及相关建议,为创新方法在科研项目实施过程中发挥驱动作用提供参考,提高科研创新效率。     

科研院所制度建设与思考 ——以中国热带农业科学院椰子研究所为例

制度建设是科研院所提升科技创新能力、推进成果转化应用、开展科技服务的重要保障.文章重点介绍了中国热带农业科学院椰子研究所制度建设的经验和做法,并结合科研院所实际,从制度建设的方法、程序、执行等方面提出了加强科研院所制度建设的建议.     

基于文献分析的中国当代竹刻研究评述

通过检索相关文献,分析了1959以来中国有关竹刻的研究现状。结果表明,中国的竹刻研究呈现明显的阶段性、地域性,在研究涉及的领域和具体内容上存在着局限性。在文献分析的基础上,提出了今后竹刻研究的重点方向,即通过与心理学、传播学、教育学、社会学等学科结合,多层面、多方向、多角度展示中国竹刻工艺。     

农业科研副产品处置存在的问题与对策

农业科研副产品具有质量及数量的不确定性,目前国家没有明确的界定标准和管理制度,各地农业科研院所管理制度也不统一.文章以天津市农业科学院为例,介绍了当前农业科研单位科研副产品处置的现状,分析了科研副产品处置存在的问题,剖析了造成科研副产品处置管理不规范的原因,并提出了加强组织领导、建立健全管理制度、加强科研副产品精细化管理等加强科研副产品处置管理的对策建议.     

Isolation and Characterization of GhLEA3 Gene from Upland Cotton and Its Expression in Response to Low Temperature Stress

[Objective] Based on the analysis of cotton GhLEA3 gene structure and its expression model in chilling stress, we investigated the resistance function of GhLEA3 in response to cold stress. [Method] We cloned GhLEA3 from upland cotton by homologous sequence cloning way. We analyzed the properties of the GhLEA3, and constructed phylogenetic tree by bioinformatics analysis. We constructed the transient expression vector 35S∷GhLEA3-GFP by In-Fusion connection technology and studied the subcellular localization of GhLEA3. The expression of GhLEA3 gene in leaves of TM-1 at three-leaf stage under low temperature stress treatments (4 ℃, 24 h) was performed. Agrobacterium tumefaciens mediated floral dipping method was used to transform the gene with expression vector 35S∷GhLEA3-GFP into Arabidopsis thaliana wild type. Low temperature germination experiment at 4 ℃ was conducted to verify germination ability of the transgenic Arabidopsis thaliana T₃ seed. The transgenic Arabidopsis seedlings were treated at 4 ℃(low temperature), and all the leaves were taken to measure their electrical conductivity. [Result] The coding sequence of GhLEA3 gene is 1 218 bp, which encodes 405 amino acids. GhLEA3 protein includes 4 functional domains of PF02987. Phylogenetic analysis showed that the similarity of amino acid sequences between upland cotton GhLEA3 and Arabidopsis thaliana AtLEA3 was 52.6%. GhLEA3 might be mainly localized in vacuoles and small vesicles. GhLEA3 was up-regulated in leaves after low temperature treatment. The germination rate of transgenic Arabidopsis thaliana of T₃ generation at low temperature was significantly higher than that of wild type, and its electrical conductivity of leaves after low temperature treatment was significantly lower than that of wild type. [Conclusion] GhLEA3 belonged to the member of LEA3 family. Phylogenetic analysis showed that GhLEA3 had the closest relationship with AtLEA3. GhLEA3 was induced by low temperature stress and may play an important role in improving cold resistance.     

西方语境的中国古典园林审美认知历史溯源

中国古典园林审美不仅仅在中国文化体系中进行讨论，随着全球化进程，西方语境学者也逐渐涉及相关的内容。尝试寻找一种跨文化的“他者”视角，梳理近3个世纪以来西方语境的中国古典园林审美认知经历的3个主要阶段。以18世纪为开端，经过19—20世纪借助西译艺术著作和海外园林建设实现对审美理解从印象到真实的转变，到进入21世纪后诞生的跨学科的诸多新观，这个过程中展现出以中国传统园林审美为代表的打破自身线性历史的闭关自守，回归全球语境的未来中国古典园林研究趋势。     

实证分析商贸流通对沿海农业经济增长的影响

以商贸流通对于沿海农业经济增长的问题为研究对象,实证研究结果表明,商贸流通对于农业经济总产值和农业人均可支配收入均具有促进作用.总体而言,商贸流通行业总产值对农业人均可支配收入影响的强度较对农业经济总产值的影响更显著,从而从实证研究角度证明商贸流通有利于沿海经济的增长.提出了应创新商贸流通农业经济运作模式,优化商贸流通农业经济发展环境,加强商贸流通农业经济人才培养,推动商贸流通农业冷链物流发展,构建商贸流通农业经济产业联盟等促进农业经济发展的对策.     

花生耐盐碱响应机制及缓解措施的研究进展

花生是中国重要的油料作物,其单产和总产居世界首位。新疆盐碱地耕地面积占全疆总耕地的30.12%,盐碱地严重制约了新疆农作物发展水平。本文概括了盐碱胁迫对花生种子萌发的影响、盐碱胁迫对花生生长及生理特性的影响、花生对盐碱胁迫的响应机制,提出了缓解盐碱胁迫的相应措施,总结了花生耐盐碱响应机制及缓解措施的研究进展,最后指出了未来新疆盐碱地区花生的发展方向,并提出了应注重土壤改良剂研发及应用的建议,同时也为该地区选育和筛选耐盐碱花生种质以及品种提供了参考。