四川省农业资源开发利用现状及可持续利用对策

采用系统、综合分析法,全面、系统、科学的分析评价了四川农业资源开发利用现状及其发展变化趋势,针对四川耕地面积不断减少、人地矛盾日趋尖锐、水土流失严重、水资源利用率低、水资源污染日趋严重等制约四川经济社会可持续发展的主要因素,提出了切实保护耕地、加强生态环境保护和建设、防治水资源污染、提高水资源利用率和供水能力等一系列实现农业资源可持续利用的对策和措施.     

将“生态保护第一”贯穿于国土资源工作各方面全过程

正青海在全国生态文明建设中具有十分重要的战略地位。去年以来,习近平总书记先后六次就做好青海生态环境保护问题做出指示批示。今年以来,省委、省政府坚持生态立省战略,在生态环境整治上重拳出击,刮起生态整治"风暴",全力整治破坏生态环境突出问题,彰显了以壮士断腕、抓铁有痕的作风落实"生态保护第一"的坚定态度和决心。国土资源部门在全省生态文明建设中担负着基础性、先导性职能角色,将"生态保护第一"要求贯穿于新时期国土资源工作的各方面、全过程,是当前全省国土资源部门的新使命。     

刘彦随:对挤占生态空间说“不”

正第二次全国土地调查主要数据成果显示,当前我国土地利用状况发生了显著变化,生态环境形势仍很严峻,城乡生态空间被挤压的问题日趋严重。如何切实保护生态空间、建设生态文明?如何科学划定生态红线?如何完善生态修复制度和生态补偿制度?针对这些热点问题,北京师范大学长江学者特聘教授刘彦随进行了解读。     

湖州市湿地生态补偿实践与对策措施

正湿地是地球生态环境的重要组成部分,被誉为"地球之肾",具有涵养水源、净化水质、调蓄洪水、调节气候和维护生物多样性等重要生态功能。保护湿地资源对于维护地球生态环境意义重大。湿地生态补偿是有效保护湿地生态环境,促进人与自然和谐发展的重要手段。湿地生态补偿制度是指湿地生态服务功能利用者对湿地资源所有权者或利用者因建设湿地环境而损失的利益的恢复与填补,以及湿地生态服务功能利用者直接对湿地生态环境的补偿,它的建立是利用和保护湿地资源的关键环节。     

永州市涔天河库区的生态和社会效应遥感监测

水库的建设为经济的持续发展和社会的稳定做出了重大贡献,同时也带来了一系列生态环境方面的影响。在党的十九大提出要加快生态文明体制改革、建设美丽中国的背景下,评估水库建设的生态和社会效应是衡量区域水库建设成效的基础,对我国合理开展水利工程的开发与建设至关重要。本文基于多源多时期遥感影像,利用人机交互式分类技术,监测了永州市涔天河水库扩建工程建设前中后(2012、2015、2017年)时期内库区内各类型的时空格局变化过程,分析了区域水库扩建对水域、耕地、林地、工程施工、重要基础设施建设、城镇扩张、移民安置、农业种植结构的影响,并评估了库区生态环境和社会经济效应,评估结果表明,利用遥感技术手段结合经济社会统计数据进行生态环境和经济社会环境监测,能够快速、准确地监测了区域内的地表覆盖格局演变过程,涔天河水库扩建工程的建设通过移民开发式扶贫,移民生活水平能得到恢复并有所提高,具有较大的经济效益、社会效益。研究基于以上评估结果,提出了库区要划定生态保护红线,加强规划的制定以及严格控制建设占用耕地等保护库区生态环境的建议。     

青海地勘工作中生态环境保护的现状及对策

正根据"保护生态环境,实施可持续发展战略"的基本国策,紧紧围绕习近平总书记"生态文明建设"的讲话精神和省委省政府"生态立省"的战略要求,为更好地实现生态环境保护工作和地质勘查工作的协调发展,依据近年来的经验做法、生态保护现状及存在问题,今后地勘工作中要进一步加强生态保护和建设工作。一、地勘工作生态保护现状1、贯彻中央精神,加强"生态文明建设"。党的十八届三中全会做出了建立生态文明制度     

行业资讯

<正>用最严格制度最严密法治保护生态环境用最严格制度最严密法治保护生态环境,加快制度创新,强化制度执行,让制度成为刚性的约束和不可触碰的高压线。——2018年5月18日至19日,习近平出席全国生态环境保护大会并发表重要讲话只有实行最严格的制度、最严密的法治,才能为生态文明建设提供可靠保障。——2013年5月24日,习近平在中共中央政治局第六次集体学习时强调     

良好生态环境是最普惠的民生福祉

<正>保护生态环境就是保护生产力,改善生态环境就是发展生产力。良好生态环境是最公平的公共产品,是最普惠的民生福祉。——2013年4月8～10日,习近平在海南考察工作时指出良好生态环境是最普惠的民生福祉,坚持生态惠民、生态利民、生态为民,重点解决损害群众健康的突出环境问题,不断满足人民日益增长的优美生态环境需要。——2018年5月18～19日,习近平出席全国生态环境保护大会并发表重要讲话     

用最严格制度最严密法治保护生态环境

用最严格制度最严密法治保护生态环境,加快制度创新,强化制度执行,让制度成为刚性的约束和不可触碰的高压线。——2018年5月18日至19日,习近平出席全国生态环境保护大会并发表重要讲话只有实行最严格的制度、最严密的法治,才能为生态文明建设提供可靠保障。     

矿山开发与生态环境保护浅析

根据国家环境保护总局《矿山生态环境保护与污染防治技术政策》（2005[109]号）的要求,实现矿产资源开发与生态保护协调发展,提高矿产资源开发利用效率,避免和减少矿区生态环境破坏和污染。矿产资源的开发应贯彻“污染防治与生态环境保护并重,生态环境保护与生态环境建设并举;以及预防为主、防治结合、过程控制、综合治理”的指导方针,推行循环经济的“污染物减量、资源再利用和循环利用”的技术原则。     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

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.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

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.     

Information for authors

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     

Advances in Polar Science CONTENTS(Volume 25,2014)

正~~     

Guide to Authors： Journal of Mountain Science

<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.     

Journal of Mountain Science(JMS)

<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     

Influence of livestock soil eutrophication on floral composition in the Pyrenees mountains

Livestock behaviour in the Pyrenees includes free grazing and a long resting period that provokes the accumulation of dung and urine in some places,so-called camping areas. The aims of this study were （i） to analyze any change in floral composition,and in nutritional and chemical contents of plants in a livestock camping area; and （ii） to relate the floral composition with soil chemical properties. In a linear transect,five sampling zones were established,from the centre of the camping area to the surrounding Nardus stricta-dominant pasture. The above ground plant biomass and the topsoil were sampled in each zone with 6 replicates per zone. Plant species were classified and weighed to calculate above ground biomass,nutritional and chemical contents,and Shannon diversity and evenness indices. Additionally,soils were sampled in two periods,at the beginning and at the end of grazing period. Soil available nutrients （nitrate,ammonium,phosphorus,potassium,calcium and magnesium）,total nitrogen,organic carbon and pH were measured.
Plant chemical contents （protein,lignin and others） were significantly related to the proportions of grasses,legumes and other plants; so,the protein content is positively correlated with legumes plant biomass while lignin content is negatively correlated with grasses. Both plant and soil nutrients increased linearly towards the centre of the camping area. However,the relationship among plant species richness,diversity and evenness relative to its position along the studied transect was bell-shaped. From the outskirts to the centre of the camping area,plants with low nutrient demand were progressively replaced by those with medium and high nutrients demand and by pioneers.
Nardus stricta-dominant pasture has low plant diversity and plant nutrient content as well as a poor soil nutrient availability. The presence of the camping area introduced patches with more soil nutrients and new species in the large spatial scale. However at a small spatial scale,the strong soil nutrien     

General Table of Contents(Vol.11,2014)

<正>~~     

介绍GPS定位中的几个概念

文章概略介绍了利用卫星进行定位的原理 ;由卫星信号传播、信号接收和SA政策等引起的理论误差 ;给出了多种快速、高精度定位的工作模式和观测点选择的原则 ;列出了将WGS - 84坐标转换为我国坐标的公式及解算参数的具体方法 ,供读者在GPS工作中参考。