为全面深入了解玉米种植密度和产量相关研究在国内和国际的现状和发展趋势,以中国知网数据库和Web of Science核心合集数据库中2000—2022年收录有关玉米种植密度和产量领域的文献(5150篇)为样本,基于CiteSpace软件进行可视化分析。结...为全面深入了解玉米种植密度和产量相关研究在国内和国际的现状和发展趋势,以中国知网数据库和Web of Science核心合集数据库中2000—2022年收录有关玉米种植密度和产量领域的文献(5150篇)为样本,基于CiteSpace软件进行可视化分析。结果表明,美国居于该领域总研究量榜首,中国紧随其后,远远超过其他国家,近年来中国对该领域的研究论文数已经赶超美国,并且每年保持100篇以上的发文量。Agronomy Journal期刊发文量最多,共计230篇,在学术界影响力最大。中国学者刘鹏发文数量最多,对该领域的研究进展贡献最大,与其他作者合作也较为紧密。研究机构以高校为主,中国北方居多,各区域机构之间的合作仍有待加强。在该领域,鲜食和青贮等专用型玉米、氮水利用效率、可持续农业、机械化管理、土壤性质、产量损失、数学模型、秸秆利用等是近年来研究热点问题。展开更多
To further ascertain the origin of the Ordovician Majiagou Formation reservoirs in the Ordos Basin,the M54-M51 sub-members of the Ordovician Majiagou Formation in the eastern Sulige gasfield of Ordos Basin were taken ...To further ascertain the origin of the Ordovician Majiagou Formation reservoirs in the Ordos Basin,the M54-M51 sub-members of the Ordovician Majiagou Formation in the eastern Sulige gasfield of Ordos Basin were taken as examples to analyze the vertical development characteristics of eogenetic karst and to discover the dissolution mechanism and its control on reservoirs through observation of a large number of cores and thin sections.According to detailed analysis of petrologic characteristics,the reservoir rock types include micritic dolomite,grain dolomite and microbialite which have mainly moldic pore,intergranular(dissolved)pore,and(dissolved)residual framework pore as main reservoir space respectively.The study area developed upward-shallowing sequences,with an exposure surface at the top of a single upward-shallowing sequence.The karst systems under the exposure surface had typical exposure characteristics of early dissolution and filling,indicating these reservoirs were related to the facies-controlled eogenetic karstification.With the increase of karstification intensity,the reservoirs became worse in physical properties.展开更多
文摘为全面深入了解玉米种植密度和产量相关研究在国内和国际的现状和发展趋势,以中国知网数据库和Web of Science核心合集数据库中2000—2022年收录有关玉米种植密度和产量领域的文献(5150篇)为样本,基于CiteSpace软件进行可视化分析。结果表明,美国居于该领域总研究量榜首,中国紧随其后,远远超过其他国家,近年来中国对该领域的研究论文数已经赶超美国,并且每年保持100篇以上的发文量。Agronomy Journal期刊发文量最多,共计230篇,在学术界影响力最大。中国学者刘鹏发文数量最多,对该领域的研究进展贡献最大,与其他作者合作也较为紧密。研究机构以高校为主,中国北方居多,各区域机构之间的合作仍有待加强。在该领域,鲜食和青贮等专用型玉米、氮水利用效率、可持续农业、机械化管理、土壤性质、产量损失、数学模型、秸秆利用等是近年来研究热点问题。
基金Supported by the China National Science and Technology Major Project(2016ZX05004006-001-002)CNPC-Southwest Petroleum University Innovation Consortium Technology Cooperation Project
文摘To further ascertain the origin of the Ordovician Majiagou Formation reservoirs in the Ordos Basin,the M54-M51 sub-members of the Ordovician Majiagou Formation in the eastern Sulige gasfield of Ordos Basin were taken as examples to analyze the vertical development characteristics of eogenetic karst and to discover the dissolution mechanism and its control on reservoirs through observation of a large number of cores and thin sections.According to detailed analysis of petrologic characteristics,the reservoir rock types include micritic dolomite,grain dolomite and microbialite which have mainly moldic pore,intergranular(dissolved)pore,and(dissolved)residual framework pore as main reservoir space respectively.The study area developed upward-shallowing sequences,with an exposure surface at the top of a single upward-shallowing sequence.The karst systems under the exposure surface had typical exposure characteristics of early dissolution and filling,indicating these reservoirs were related to the facies-controlled eogenetic karstification.With the increase of karstification intensity,the reservoirs became worse in physical properties.
