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林业有害生物杨干象危险性分析 总被引:5,自引:0,他引:5
参照国际上有害生物危险性分析(Pest Rist Analysis,简称PRA)方法,从有害生物的国内分布状况、潜在的危险性、寄主植物的经济重要性、传播扩散的可能性以及危险性的管理难度等几个方面进行定性和定量分析,对杨干象的危险性作出综合评价。评价结果表明杨干象在我国属高度危险的林业有害生物。 相似文献
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本文参照国际有害生物危险性分析(Pest Risk Analysis)方法,从草履蚧Drosicha corpulenta(Kuwana)的国内外分布状况、潜在危险性、寄主植物的经济重要性、传播蔓延的可能性以及危险性的管理难度等几个方面进行了定性、定量分析,对其危险性做出了综合评价,结果表明草履蚧在我国属中度危险的有害生物,应及时采取措施防治其扩散蔓延. 相似文献
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林业有害生物杨小舟蛾的危险性分析和风险管理 总被引:1,自引:0,他引:1
文章应用有害生物危险性评价的定性定量分析方法,结合淮安市林业资源状况,从杨小舟蛾的国内分布情况、在淮安市的潜在危险性、寄主植物的经济重要性、传播扩散的可能性以及危险性的管理难度等几个方面进行定性和定量分析,对杨小舟蛾的危险性做出综合评价。评价结果表明杨小舟蛾在淮安市属于中度危险的林业有害生物,应及时采取措施进行防治。 相似文献
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杨直角叶蜂在河南的危害与风险性管理 总被引:1,自引:0,他引:1
参照国际有害生物危险性分析(Pest Risk Analysis)方法,从杨直角叶蜂Stauronematus compressicornis Fabricius的国内外分布状况、潜在危险性、寄主植物的经济重要性、传播蔓延的可能性以及危险性的管理难度等几个方面进行了定性、定量分析,对其危险性做出了综合评价,结果表明杨直角叶蜂在我国属轻度危险的林业有害生物,及时采取防治措施,能够有效防止其扩散蔓延。 相似文献
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根据市场趋势调整林业经营对策,是林业生产的重要课题,而各类用材林经济轮伐期的确定则是重中之重.就此,根据西江林场近10 a来杉木用材林调查数据和有关资料,用土地纯收益法、内部收益率模型、净现值一般模型处理计算,对西江林场杉木林用材林的经济轮伐期作了初步探讨,得出杉木轮伐期为13-15 a.依此可大大缩短杉木林的经营周期,对加速资金周转,提高经营效益,解决两危问题增强林业生产积极性和活力等都有一定的作用. 相似文献
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指出了林业作为生态文明建设的主体,是一项重要的公益事业和基础产业,在实现人与自然和谐发展的历史进程中,负有重大的使命和光荣的任务。林业发展在我国经济发展中占据重要地位,其对生态环境的积极影响得到了社会的广泛关注。在生态文明建设的大背景下,针对榆林市林业发展的现状,从生态效益、经济效益和社会效益3个方面提出了几点建议和思考。以供参考。 相似文献
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中国林产品采购经理指数(PMI)作为表征林产制造业走势兴衰的晴雨表,其权重的合理性是保障指数先导性、有效性的核心条件。通过对中国林产品PMI进行分析可以发现,现行权重体系不影响其作为“行业晴雨表”的先导性功能,但是赋权方式存在优化空间。文中提出的优化的权重体系更有利于提升林产品PMI对行业经济走势的预测能力。 相似文献
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陈伯利 《内蒙古林业调查设计》2014,(5):14-16
根据国家提出的"严管林、慎用钱、质为先"的总体要求,结合林业局实际情况,按照"实施生态战略、发展特色经济、构建和谐兴安、建设社会主义新林区"的战略构想,认真贯彻落实科学发展观,坚持把资源保护作为首要任务,积极探索"在保护中发展、在发展中保护"的新路,稳步推进工程建设,为林区森林资源的保护、生态功能的恢复、经济社会的和谐发展奠定了坚实的基础。 相似文献
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Systematic comparisons of human dependence on forests and environmental resources have been challenging, as a result of heterogeneous methodologies. Specialized Forestry Modules have been developed, with the goal of filling current information gaps concerning the economic importance of forest and wild products in household welfare and rural livelihoods. Results from a pilot assessment of the Forestry Modules in West Kalimantan, Indonesia, are presented, showing that the Forestry Modules perform well in extracting the expected information: mean per capita forest and wild product income shifts according to the geographical “forest gradient”. Significantly, in the forest-rich upstream village, mean forest and wild product income and mean forest-related wage and business incomes exceeds current mean agricultural income statistics for West Kalimantan and mean non-agricultural rural household incomes in the lowest bracket. Consumption of forest products and importance as a coping strategy was higher in the most upstream village, where sale of forest products in times of shock was more marked in the most downstream village (where forest coping strategies were also least important). The Forestry Modules' detailed and systematic approach can help ensure that contributions of forest and wild products are not underestimated in national figures. 相似文献
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Helmut Brandl 《Small-Scale Forestry》2007,6(1):1-18
This paper documents the history of the first 20 years of the Small-scale Forestry Group of the International Union of forest
Research Organisations (IUFRO). The origins of the Small-scale Forestry Group can be traced back to the ‘Five Year Report
1982–1986, IUFRO Division 3 Forest Operations and Techniques’ where ‘Division 3 took the initiative to intensify research
in the area of Small-scale Forestry by promoting a new project group P 3.04 ...’. In 1986 this group was founded during the
IUFRO World Congress in Ljubljana. The emergence of the Small-scale Forestry Group reflects the expanding interest in small-scale
forestry as a field of study and its increasing social and economic importance. This paper describes and critically assesses
the how the Group has developed during the last 20 years, and reviews the activities which have been undertaken, and makes
some forecasts about the future of the Group. The key impression is that the Group has been remarkably active, and has achieved
much more than could have been predicted at the time it was formed. 相似文献