共查询到20条相似文献，搜索用时 46 毫秒
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伴随经济社会的不断发展,土地需求逐步增加,土地供应日趋紧张,规范土地整理开发行为,科学指导土地整理开发工作意义重大。以位于黄河三角洲的垦利县为例,根据其土地利用特点,分析开发整理工作取得成效及存在问题,探索土地整理开发工作要点,为今后开发整理工作提供理论指导和借鉴。 相似文献
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谈广西土地开发整理项目优化设计方向 总被引：1，自引：0，他引：1
土地开发整理具有鲜明的地域性,地区不同,开发整理的重点、内容和方法也不相同.根据农业自然条件的差异、土地资源的特点、耕作制度的不同、结合土壤分区将广西土地划分为6个指导区,从北向南、自西向东依次为桂西北山地区、桂东北丘陵山地区、桂西岩溶山地区、桂中溶蚀平原区、桂南低平原区和桂南沿海区.笔者通过分析6个指导区的区域特点及各区农地资源利用的主要制约因素,对广西土地开发整理项目优化设计方向提出一些建议. 相似文献
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黄河三角洲是一个多世纪以来由黄河泥沙快速堆积形成的新生土地。黄河年均携带近 10×108 t泥沙入海,年均新淤土地2 000 hm2。黄河三角洲为现代经济建设提供了大面积待开发的处女地,但生态环境相当脆弱。近年来,通过黄河三角洲农业综合开发、黄淮海平原农业开发和黄河三角洲农业综合开发实验项目,该地共实施土地开发整理项目265个,累计开发宜农荒碱地 9.51 万 hm2,改造中低产田7.71 万 hm2,改造草场 1 万 hm2,封育滨海草场50万亩,水产开发 0.63 万 hm2,贝类养殖 20万亩;累计投资近9.6亿元,其中国家和山东省投资3.9亿元,市、县区乡镇投资… 相似文献
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土地整理效益评价指标建立及方法应用 总被引：3，自引：0，他引：3
土地整理效益研究是土地整理理论及实践研究的一个重要组成部分,针对目前我国关于土地整理项目效益分析研究很薄弱的状况,确立土地整理项目效益分析指标体系,运用层次分析法(AHP),提出土地整理项目效益分析综合判断模型,以期丰富土地整理的理论,规范与指导土地整理的实践活动。 相似文献
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一、对土地整理项目调查发现的问题及原因
庆安县已完成的土地开发整理项目有两个：新立土地开发项目新增耕地2259ha,久胜镇基本农田土地整理项目平整土地1751．2638ha。2009年末,庆安县国土资源局协同当地乡政府,采取走访与问卷的形式,对两个土地整理项目区及周边村屯的农户进行调查,整理分析调查结果后,发现现阶段土地整理实施过程中存在以下具体问题： 相似文献
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文摘 《资源导刊(河南)》2006,(11)
福建省在土地开发整理实践中,已经建立比较完善的省级土地开发整理规章制度,并用于指导土地开发整理工作.其主要实施机构是福建省土地开发整理中心,下设综合、项目、稽查、技术和储备5个科.该省土地开发整理的主要经验有: 相似文献
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编者按:土地整理是一项涉及面广、政策性强、实施工作协调难度大的系统工程.由于广西的土地整理还处于起步阶段,所以今后的土地整理工作任务还相当繁重.广西区国土资源厅土地整理中心按照厅党组"高标准、严要求抓好项目实施管理工作,一定要从中探索出一条适合广西土地整理工作特点的经验来"的指示精神,于2004年底对第一个自治区投资的土地整理项目--武鸣县双桥镇土地整理示范项目实施管理全过程进行全方位的指导,经过6个多月的艰苦拼搏和积极实施,项目已顺利竣工. 相似文献
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2006年6月21～22日,由广西区国土资源厅土地整理中心主持的2005年国家和自治区投资土地开发整理项目任务布置会在来宾市举行.此次会议的主题是布置国家、自治区投资的土地整理项目实施任务,下达项目实施任务为78个,项目涉及全区14个市、34个县.由于项目多,工期短,要求严,因此曹国生副厅长要求,确保国家投资土地整理项目要按时、按质、按量完成. 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet. 相似文献
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《山地科学学报》2014,(4)
<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by 相似文献
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References： 《极地研究(英文版)》2007,18(1):73-83
Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated. 相似文献
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The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature. 相似文献