浅谈西部地区占用征用林地存在问题及建议

本文在重点总结西部地区四川省4个监测年度的林地监测基础上,结合监测中发现的某些难点及问题,以四川省代面,从服务西部大开发的角度出发进行阐述并提出建议,旨在为林业法律、法规的制定者和林地管理者提供一些借鉴和参考。     

四川省林地落界成果质量检查系统的研建

林地落界成果质量检查是林地落界工作中的重点及关键。针对四川省林地落界成果质量检查需求,本文通过分析成果质量检查流程及内容,设定了成果质量检查项目,设计了质量检查系统功能,针对落界成果数据特点,对落界成果数据的存储、使用和管理方式进行分析比较,采用SQL Server Express和ArcSDE构建林地落界成果地理空间数据库,在此基础上利用ArcObject建立了四川省林地落界成果质量检查系统。系统成功应用于四川省林地落界成果质量检查工作中,有效的保证了全省林地落界成果数据符合国家要求。     

初探四川省退耕还林林地经营

森林经营是巩固退耕还林成果、实现工程建设目标的必要措施。在分析四川省退耕林地经营现状和存在问题的基础上,提出退耕林地经营工作的思路和对策。     

青海省大通县林地保护研究

大通县作为我国西部林地保护典型县,连续数年取得林地保护工作卓越成绩,通过对大通县林地保护现状的分析,总结了大通县林地保护中的不足,并以大通县现状和当前的先进林地保护理念及保护手段为依据,为大通县林地保护工作提出了切实可行的创新性对策.     

建立全区数字化林地监测与管理系统的探讨

林地是森林资源的载体,开发数字化林地监测与管理系统,提升林地监测与管理水平,是全区森林资源管理和生态建设的一项重要内容。文章将利用计算机技术,以In ternet为基础平台,建立全区数字化林地监测与管理系统,构建新的林地监测与管理思维方式进行探讨。     

初探四川省退耕还林林地经营

森林经营是巩固退耕还林成果、实现工程建设目标的必要措施。在分析四川省退耕林地经营现状和存在问题的基础上，提出退耕林地经营工作的思路和对策。     

基于ArcObjects的四川省林地落界软件的研发与应用

综合运用数据库技术和3S技术,分析林地落界工作流程,研究林地落界图层标准化建立、遥感判读中林地图斑属性因子快捷填写及林地图斑快捷合并和自动融合的方法,设计林地落界软件结构和功能。基于ArcObjects技术研发了四川省林地落界软件,软件包括标准图层数据建立、林地小班因子借用、林地图斑合并和定制更新等功能,并已应用于四川省100多个县的林地落界实践工作中。实践结果证明,该软件有效地保证了全省落界数据的统一性,降低了林地落界工作的难度和复杂度,达到林地落界成果精度要求,具有很好的实用性。     

推进林地年度变更调查提升林地动态监测水平

总结回顾了江苏林地落界成果情况,阐明了在此基础上开展林地年度变更调查的必要性及重要意义,明确了全省林地年度变更调查的目标任务和基本内容,并提出了不断提升林地动态监测水平的发展方向.     

浅谈林地变更调查

林地变更调查以林地"一张图"为基础,利用先进的遥感技术对林地进行核查,分析林地范围和林地保护变化情况,及时更新"一张图"数据库,实现林地动态监测,为政府作出宏观决策提供可靠依据。本文从阐述林地变更调查的意义入手,对当前林地变更调查中存在的问题进行分析,并提出完善林地变更调查的建议,期望对提高林地动态监管水平,实现林地保护利用规划目标有所帮助。     

维护生态环境的林地管理措施

从林地的重要性入手 ,阐述了我国林地管理存在的主要问题 ,并提出相应措施 :健全法律制度 ,完善林地有偿使用机制 ,保护现有的林地资源 ,加强迹地清理 ,林地资源管理信息系统 ,进行林地动态监测     

关于青海水土保持及荒漠化治理的几点思考

通过对青海省水土流失及荒漠化现状的分析,提出了青海水土保持及荒漠化治理中存在的问题,并针对这些问题,提出了几点建议。     

周至县苗木花卉产业和杂果经济林现状及发展思路

苗木花卉和杂果收入在周至农民收入中占有很大的比重。本文分析了周至县发展苗木花卉和杂果经济林的现状,针对存在的问题提出了发展思路和措施。     

科学布局合理规划 努力构建湖北生态建设体系

笔者从党的十七大报告中提出的“建设生态文明”的指导思想出发,结合我省地理特征和生态现状,就我省林业生态体系布局和建设措施谈一点看法,仅供参考。     

南漳县林业经济发展现状及对策

山区农村经济的发展希望在山,潜力在林。发展林业经济是加快山区农民脱贫致富奔小康的重要途径,在整个县域经济发展具有不可替代的作用。笔者在调查研究的基础上,针对性地提出了南漳县如何发展林业经济的对策,为科学决策提供参考。     

九阜山植物资源的现状、特点与保护

在对九阜山自然保护区进行自然资源综合考察的基础上,论述九阜山植物资源的现状和基本特点,提出保护植物资源的对策。     

建始县退耕还林工程建设现状、问题及对策

笔者通过对建始县2002~2006年退耕还林工程建设情况调查,找出存在的问题,提出可行性对策及建议,供同行参考。     

Trees and shrubs as sources of fodder in Australia

Experience with browse plants in Australia is briefly reviewed in terms of their forage value to animals, their economic value to the landholder and their ecological contribution to landscape stability. Of the cultivated species only two have achieved any degree of commercial acceptance (Leucaena leucocephala and Chamaecytisus palmensis). Both of these are of sufficiently high forage value to be used as the sole source of feed during seasonal periods of nutritional shortage. Both are also leguminous shrubs that establish readily from seed. It is suggested that a limitation in their present use is the reliance on stands of single species which leaves these grazing systems vulnerable to disease and insects. Grazing systems so far developed for high production and persistence of cultivated species involve short periods of intense grazing followed by long periods of recovery. Similar management may be necessary in the arid and semi-arid rangelands where palatable browse species are in decline.     

The Soil and Roots as Factors in Tree Stability

The paper describes a method of studying the factors affectingtree stability by measuring the forces required to pull treesover. It indicates that Fomes annosus root rot may reduce atree's resistance to overturning by about 30 per cent, and thatdrainage in shallow peat soils can increase resistance by some25 per cent.     

Precipitation and temperature as factors in Gremmeniella abietina epidemics

The combination of temperature and precipitation during the growth season could be correlated with the occurrence of Gremmeniella abietina epidemics in Denmark. The Gremmeniella index value (GIV) is the result of the monthly rain in mm divided by average monthly temperature in centigrade (mm/°C) and it was created to facilitate easy prediction of epidemics in Denmark. The two most severe outbreaks of G. abietina in pine and other conifers in Denmark took place in 1963–64 and 1984–85, following years where low average temperatures and high precipitation in May combined with the same weather patterns in either August or September. These meteorological conditions were not fulfilled from 1874 to 1900, in which period Pinus nigra was pronounced unsuitable for Danish forestry because of recurring problems with fungal disease. However, the earlier epidemics seemed to coincide with cold and rainy weather (high GIV) in August. In addition, severity of epidemics may also depend on the presence of dense stands between 30 and 40 years of age, as high GIV in August has occurred without disease outbreak in periods with low frequency of susceptible stands. Gremmeniella abietina attacks in Denmark are initiated by the climatic conditions expressed by the Gremmeniella index value, although it does not explain the biological process behind this phenomenon. Nevertheless, the method could be useful for other regions, where epidemics of G. abietina may be related to weather.     

秦岭林区森林资源保护的意义和可持续经营利用

秦岭林区不仅是我国森林资源的重要组成部分,也是我国重要的水源地和生态屏障。本文通过对秦岭森林资源概况与特点的分析,论述了秦岭森林资源保护的必要性,提出了秦岭森林资源可持续经营利用的基本思路和保护措施。