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树活百千年而无语,默默地装点着群山、河流、田野、村庄与城市。树多就成林,林大即为森,巍巍群山有了茂密的树木,才会有长流不息的清清溪水滋润着的田野、村庄与城镇。有了树就有了水,有了水就有了田,有了田就有了粮,有了粮就有了人。可见,树与人类的生存有着密切的关系。森林,对于人类的重要性不言而喻,我们的城市也需要树木来装点。 相似文献
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初雪 《绿色中国(A版)》2008,(8)
国家奖学金下来了,整栋宿舍楼都忙了起来。评选规则:家庭困难,学习刻苦,上学年成绩优异,无手机、电脑等高档消费品的同学。林非看了看,写了份申请书。几天后,拟定的人选公布出来了。林非看到自己在二等位置,笑了。回到宿舍,关了门,同学都不在,一口气喝了一大杯水,把寝室门关上,电视打开,沿着桌边走了一圈,又把电视关上,走了一圈,拿起杯子,放下,拿起一本书,又放下,最后躺在床上。 相似文献
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张长祥 《绿色中国(A版)》2009,(Z2):202-203
<正>拉萨的山一年比一年绿了,拉萨的树一年比一年多了,拉萨河两岸的绿色通道美了,拉萨的风沙一年比一年小了,拉萨地区的气候一年比一年好了,拉萨的农牧民收入越来越多了,拉萨的社会主义新农 相似文献
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指出了邯郸市是国家园林城市、文明城市,非常注重城市绿化,老城区和东部新城区不同的规划发展定位决定了各自的绿化特色。在分析老城区绿化特点的基础上,总结了老城区绿化的缺点,提出了这些缺点对东区绿化的启示;并通过已建成道路的绿化分析使东部绿化集成了多种功能,融入了文化,注重了人性设计,避免了老城区绿化的缺点,成为东部宜居城市的重要因素。 相似文献
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2008年12月,我们已迎来我国改革开放30周年的日子。30年来,我国改革开放事业取得了巨大的成就,前不久结束的北京奥运会,从一个侧面展示了改革开放30年的辉煌成就。公园行业也同整个国家一样,通过改革开放,获得了极大发展,公园的生态更加浓厚了,公园的景观更加美丽了,公园的文化内涵文化活动更加丰富了,公园的人气更加旺盛了,公园在人民生活中的地位更加突出了。 相似文献
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对枫香次生林改造进行了为期4 a的研究结果表明:枫香次生林改造改善了林木生长的环境,有效利用了林地,促进了林木的生长,提高了林分的价值,获得了良好的经济效益。 相似文献
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近年来,国际木材非法采伐和相关贸易成为国际社会关注的热点问题,也引起了全球非政府组织和环境保护机构的关注。非法采伐不仅直接导致森林资源的严重破坏,诱发森林火灾和病虫害,影响生物多样性,而且侵占了木材生产国政府和社区的财政收入,加剧了地区贫困和利益冲突,扰乱了国际木材市场秩序,损害了合法经营者的利益,严重影响了全球生态、经济、社会的可持续发展。为此,中国政府采取了一系列有效措施,重拳打击国际木材 相似文献
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日本国有森林类型的划分及其经营体系 总被引:6,自引:0,他引:6
日本国有林划分为4种森林类型,即国土保全林、自然维持林、森林空间利用林和木材生产林。森林类型划分的优先顺序是国家和人民利益、生态效益、社会效益和经济效益,根据合理经营的原则,确定各类森林的经营目标和经营体系,实现分类经营。以伊那谷森林计划区为例,介绍不同森林类型和经营体系。 相似文献
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Cornelia Fürstenau Franz W. Badeck Petra Lasch Manfred J. Lexer Marcus Lindner Peter Mohr Felicitas Suckow 《European Journal of Forest Research》2007,126(2):225-239
In this study, the overall utility of forest management alternatives at the forest management unit level is evaluated with
regard to multi-purpose and multi-user settings by a multi-criteria analysis (MCA) method. The MCA is based on an additive
utility model. The relative importance of partial objectives of forest management (carbon sequestration, ground water recharge,
biodiversity, and timber production) is defined in cooperation with stakeholders. The forest growth model 4C (Forest Ecosystems
in a Changing Environment) is used to simulate the impact of six forest management strategies and climate on forest functions.
Two climate change scenarios represent uncertainties with regard to future climatic conditions. The study is based on actual
forest conditions in the Kleinsee management unit in east Germany, which is dominated by Scots pine (Pinus sylvestris L.) and oak (Quercus robur L. and Quercus petraea Liebl.) stands. First, there is an analysis of the impact of climate and forest management on forest functions. Climate change
increases carbon sequestration and income from timber production due to increased stand productivity. Secondly, the overall
utility of the management strategies is compared under the priority settings of different stakeholder groups. From an ecological
perspective, a conservation strategy would be preferable under all climate scenarios, but the business as usual management
would also fit the expectations under the current climate due to high biodiversity and carbon sequestration in the forest
ecosystem. In contrast, a forest manager in public-owned forests or a private forest owner would prefer a management strategy
with an intermediate thinning intensity and a high share of pine stands to enhance income from timber production while maintaining
the other forest functions. 相似文献
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根据东北及内蒙古重点国有林区的实际情况和该地区的森林认证实践,就本区域实施森林可持续经营认证提出几点建议。认为把森林可持续经营认证和林产品产销监管链认证结合起来,对于强化森工企业的可持续经营、提高资源利用率、增加产品附加值具有重要意义。 相似文献
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组件式GIS技术在古树名木地理信息系统中的应用 总被引:2,自引:0,他引:2
对中山陵园风景名胜区的古树名木资源信息进行处理的基础上,利用MapObjects Java Standard Edition(简称MOJa-va)在Jbuilder9.0开发环境中初步建立了中山陵园古树名木地理信息系统。该系统提供的古树名木资源信息对于古树名木资源的管理、监测、合理利用、开展相关科学研究具有重要意义和实际应用价值。 相似文献
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The forest group is a new policy instrument in Flanders (northern Belgium) to realise multifunctional forest management. This
group was introduced in 1995 and organises the various kinds of forest owners, private as well as public, on a local basis
(mean working area 751 km2), with voluntary participation (as in all forest owner organisations). This study evaluates forest groups in Flanders through
an analysis of their relevance, effectiveness, utility and implementation. The targets of forest groups are relevant to the
evolving needs and priorities at the local, regional, national and international level. The effectiveness analysis reveals
that most indicators — including the quantity of timber harvest, the number of members, the forest area with an accepted management
plan, the area under management and the area with small-scale ecological measures — have been improving between 1995 and 2004.
The utility analysis emphasises that the owners are motivated because the forest group provides information and increases
knowledge, includes the owner into a collective management plan, offers a platform for sharing management experiences and
acts as a union force against the government. However, the forest group is not the solution to introduce multifunctional forest
management by all forest owners. The implementation analysis identifies a number of impeding factors, including the imbalance
between rights and duties, inconsistencies between various policy aims, and failure of forest groups to act as a common forum
for all stakeholders in their working area. 相似文献
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家具企业对库存管理重视不够,导致库存费用高,资金使用效率低。笔者从家具生产企业的材料仓库、半成品仓库入手,以数学分析手段,建立了在允许缺货、不允许缺货条件下的仓库管理模型,同时还分析了在大规模生产时,如何合理确定生产批量,并建立了数学模型。通过在企业实际实施,证明了此模型具有较强的实用性。 相似文献