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鄱阳湖生态经济区粮食产量的影响因素分析
作者: 朱再昱 李风琦 余玉荣  来源:中国农学通报 年份:2011 文献类型 :期刊 关键词: 主成分分析  相关分析  通径分析  鄱阳湖生态经济区  粮食产量 
描述:鄱阳湖生态经济区是中国南方粮食生产的重要区域。为推进鄱阳湖生态经济区战略,保障粮食生产,加快发展现代农业,利用鄱阳湖生态经济区域内25个县市粮食产量的相关数据进行相关分析、主成分分析和通径分析,探讨
全文:鄱阳湖生态经济区是中国南方粮食生产的重要区域。为推进鄱阳湖生态经济区战略,保障粮食生产,加快发展现代农业,利用鄱阳湖生态经济区域内25个县市粮食产量的相关数据进行相关分析、主成分分析和通径分析,探讨
鄱阳湖非平稳水位波动及其与长江的交互作用关系
作者: 戴雪 万荣荣 杨桂山  来源:地理学报(英文版) 年份:2015 文献类型 :期刊 关键词: Yangtze  earlier  seasonal  intensified  downstream  lacustrine  river  representative  flood  dominate 
描述:Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
全文:Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
粮食安全与鄱阳湖流域粮食可持续发展
作者: 杨荣俊 杨志诚  来源:鄱阳湖学刊 年份:2009 文献类型 :期刊 关键词: 可持续发展  粮食安全  鄱阳湖流域 
描述:本文从维护国家粮食安全的高度,论述了发展粮食生产的重要性。坚持江西作为国家粮食主产区的地位不能动摇、江西肩负国家粮食安全的责任不能动摇,是建设鄱阳湖生态经济区的重要战略思想。本文也论述了鄱阳湖
全文:本文从维护国家粮食安全的高度,论述了发展粮食生产的重要性。坚持江西作为国家粮食主产区的地位不能动摇、江西肩负国家粮食安全的责任不能动摇,是建设鄱阳湖生态经济区的重要战略思想。本文也论述了鄱阳湖
鄱阳湖平原商品粮基地建设初探
作者: 封志明  来源:农业区划 年份:1993 文献类型 :期刊 关键词: 鄱阳湖平原  商品粮  基地建设 
描述:一、区域粮食生产的地位和优势(一)鄱阳湖平原是重点产粮区。鄱阳湖平原在《中国综合农业区划》中,属于长江中游平原农业水产区。按《江西省综合农业区划》,赣北鄱阳湖平原粮、棉、油、
全文:一、区域粮食生产的地位和优势(一)鄱阳湖平原是重点产粮区。鄱阳湖平原在《中国综合农业区划》中,属于长江中游平原农业水产区。按《江西省综合农业区划》,赣北鄱阳湖平原粮、棉、油、
鄱阳湖浮游植物叶绿素p1及营养盐浓度对水位波动的响应
作者: 刘霞 刘宝贵 陈宇炜 高俊峰  来源:环境科学 年份:2016 文献类型 :期刊
描述:鄱阳湖浮游植物叶绿素p1及营养盐浓度对水位波动的响应
鄱阳湖遭遇严重干旱面积创历史同期最低等
作者: 本刊辑部  来源:老区建设 年份:2011 文献类型 :期刊 关键词: 2010年  卫星遥感  干旱  水域面积  历史  鄱阳湖  卫星监测  监测结果 
描述:同期的1/10,创下历史同期最低纪录。 今年以来,江西省出现历史罕见的春夏连旱。从1月开始,鄱阳湖水位持续走低。江西水文部门监测结果显示,22日8时,鄱阳湖星子站水位10.54米、鄱阳站水位13.60米
全文:同期的1/10,创下历史同期最低纪录。 今年以来,江西省出现历史罕见的春夏连旱。从1月开始,鄱阳湖水位持续走低。江西水文部门监测结果显示,22日8时,鄱阳湖星子站水位10.54米、鄱阳站水位13.60米
鄱阳湖生态经济区粮食全要素生产率研究——基于25个县(市)面板数据的DEA分析
作者: 陈苏 张利国  来源:鄱阳湖学刊 年份:2013 文献类型 :期刊 关键词: DEA分析  全要素生产率  鄱阳湖生态经济区  粮食 
描述:鄱阳湖生态经济区作为江西省传统农区,其粮食生产在江西省粮食生产格局中占有重要地位。本文采用DEA分析的Malmquist指数模型,实证分析了鄱阳湖生态经济区25个县(市)粮食全要素生产率(TFP
全文:鄱阳湖生态经济区作为江西省传统农区,其粮食生产在江西省粮食生产格局中占有重要地位。本文采用DEA分析的Malmquist指数模型,实证分析了鄱阳湖生态经济区25个县(市)粮食全要素生产率(TFP
鄱阳湖遭遇严重干旱面积创历史同期最低·国开行加大力度支持粮食生产基地建设·全国妇女小额贴息贷款现场推进会召开需特别关注扶持农村中低收入妇女(等6则)
作者:暂无 来源:老区建设 年份:2011 文献类型 :期刊
描述:鄱阳湖遭遇严重干旱面积创历史同期最低·国开行加大力度支持粮食生产基地建设·全国妇女小额贴息贷款现场推进会召开需特别关注扶持农村中低收入妇女(等6则)
鄱阳湖生态经济区农业合作组织的创新与发展研究
作者: 揭新华 聂洪辉  来源:经济与社会发展 年份:2012 文献类型 :期刊 关键词: 农业合作组织  鄱阳湖生态经济区  发展 
描述:在农业经济日益走上世界市场激烈竞争的今天,鄱阳湖粮食生产的发展需要进行因地制宜的改进和发展。研究鄱阳湖农业合作组织的演进与创新,能够促进鄱阳湖粮食主产区的经济可持续发展,推动江南地区有中国特色
全文:在农业经济日益走上世界市场激烈竞争的今天,鄱阳湖粮食生产的发展需要进行因地制宜的改进和发展。研究鄱阳湖农业合作组织的演进与创新,能够促进鄱阳湖粮食主产区的经济可持续发展,推动江南地区有中国特色
2001-2010年鄱阳湖圩区水稻多熟种植时空格局变化
作者: 李文叶 姜鲁光 李鹏  来源:资源科学 年份:2014 文献类型 :期刊 关键词: 时间窗口  水稻熟制  鄱阳湖圩区  遥感  NDVI  物候 
描述:在耕地面积有限、粮食单产水平较高的地区,提高粮食生产能力的主要途径是提高复种指数,加大土地利用强度。鄱阳湖圩区是我国重要的水稻生产基地,是我国水稻多熟种植最典型的地区之一。弄清鄱阳湖圩区时间上与空间
全文:在耕地面积有限、粮食单产水平较高的地区,提高粮食生产能力的主要途径是提高复种指数,加大土地利用强度。鄱阳湖圩区是我国重要的水稻生产基地,是我国水稻多熟种植最典型的地区之一。弄清鄱阳湖圩区时间上与空间
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