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竹林主要害虫发生类型区划初步研究 总被引:1,自引:0,他引:1
笔者在安吉县对主要竹林害虫进行了发生类型区划研究。按害虫的发生频次高低对常灾区、偶灾区、安全区的概念作了明确阐述并制定了划分标准,然后以竹区村为单位根据毛竹、杂竹面积、出笋大小年,竹林占有林地百分比、竹林分布和农业气候、地形、地貌等因子,采用逐项打分计分定类的方法按村区划全县竹虫发生类型,经验证明总正确率达85%以上。 相似文献
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为有效预防和控制1999年山东省主要林木害虫的发生与危害,依据1998年山东省气候、林木害虫发生情况等因素,对1999年主要林木害虫的发生趋势做如下分析,供各地参考。11998年林木害虫发生情况根据1998年度林木害虫发生统计报表汇总,全省有林地面积... 相似文献
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本文回顾了湖南常德市的毛竹食叶害虫发生历史,分析了主要食叶害虫的发生特点,运用系统聚类分析方法对常德市16个毛竹乡的食叶害虫发生类型进行了地理区划。 相似文献
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1.泡桐叶甲。又称泡桐金花虫,属鞘翅目,叶甲科。该虫每年发生两代,以成虫越冬,第二年4月份开始活动。成虫产卵于叶的背面,竖立成堆状,幼虫孵化后,群集于叶面,啃食叶的表皮。5月中下旬至6月上中旬为第一代发生高峰,7月下旬至8月中下旬为第二代发生高峰。 相似文献
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随林种结构的调整,景宁县近几年来兴建经济林基地的发展速度很快,这与县林业局营林公司和县农业综合开发公司两家龙头企业推动作用有关,同时揭示了规模不大管理粗放、没有发挥地方特色优势缺乏竞争力、技术含量低等问题,提出了要搞好整体规划,努力挖掘地方名优特产、选准品种实行良种化、在规模化基础上突出主栽品要形成区域化、走种养加工一条龙、贸工农一体化、农科教相结合的路子。 相似文献
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在我国当前经济新常态的环境下,发展林下经济符合我国林业经济可持续发展的要求。文章分析了辽宁省林下经济发展的基础、发展林下经济的意义、当前辽宁省林下经济发展的几种模式。针对林下经济发展存在的问题,提出统筹规划,规模化发展;打造龙头企业,壮大林下经济;加大对林下经济的金融支持、财税支持;完善林下经济发展的协作机制的对策来促进林下经济的发展。 相似文献
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简要介绍了中条山国有林管理局封山育林的现状及存在的主要问题,提出了封山育林地的选择,封山育林的培育目标,以及无林地、灌木林地、疏林地、有林地等封山育林的模式选择,最后建议封山育林与产业开发相结合。 相似文献
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通过分析最新的有关森林认证的研究资料,综述了森林认证产生的背景和起源、现状、认证体系及进展.森林认证是20世纪90年代初逐步发展起来的由环境非政府组织和民间组织发起、作为促进森林可持续经营的一种市场机制.目前共有两大全球认证体系(森林管理委员会(FSC)和ISO14001环境管理体系),两大区域认证体系(泛欧森林认证体系(PEFC)与泛非森林认证体系(PAFC))和10多个国家的认证体系正在运作.森林认证将是全球林业经营的主要模式. 相似文献
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诸暨市经济林白蚁为害现状及其防治对策 总被引:2,自引:0,他引:2
调查表明,诸暨市经济林受2科8属12种白蚁的为害,其中黑翅土白蚁和黄翅大白蚁是优势种.经济林受白蚁为害的程度与经济林种类及林内植被覆盖度有关.白蚁防治措施包括物理措施和化学措施,其中诱杀法不仅简便易行,而且成本低、效果好. 相似文献
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美国的森林经营与森林认证现状及对我们的启示 总被引:2,自引:0,他引:2
美国是世界上森林经营水平较高的国家之一,从国家林业计划、森林生态系统经营、可持续经营标准和指标等方面分析了美国森林可持续经营状况,并介绍了美国森林经营及森林认证的有关情况,借鉴美国森林可持续经营的经验,提出了我国森林可持续经营和森林认证的对策。 相似文献
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Community forest management (CFM) has received increasing worldwide attention from governments, researchers and educational
institutions over the past two decades. Many governments, especially in developing countries, have prioritized CFM over traditional
forest management systems. In Thailand, CFM is not recognized by the legal system; however, there are de facto CFM practices under common property resource regimes. CFM has in essence been practiced here for hundreds of years by local
people, and represents an important aspect of Thai culture. This study aims at evaluating CFM in Thailand in the context of
sustainable development. To meet the objective, the study gathered information through focus group discussions with various
stakeholders: academics, Forest Department staff, and members of the Chang Tok Tay community forests. From the study, it emerged that forest resources are critical for the livelihoods and survival of rural
people, and so they have protected forests to ensure sustainable livelihoods. This study identified that prospects for sustainable
CFM in Thailand are bright because: (i) community members are highly motivated and are sufficiently interested to protect
trees because they are well aware that their livelihoods are under threat from depleting forests; (ii) tradition and culture
of rural people support their relation with nature; (iii) non-timber forest products (NTFPs) play a crucial role in local
livelihoods for subsistence and necessitate protection of the forest watershed, which is vital to support their occupations;
(iv) spiritual rituals such as those where Buddhist monks bind yellow cloth on trees play a vital role in protecting trees,
something rare in other countries. The study further identified various hindrances to achieve sustainable CFM: (i) legal support
for CFM is absent; (ii) the Royal Forest Department (RFD) cannot transfer appropriate technology to community people due to
lack of legal support; (iii) scope for developing effective strategies for sustainable CFM by combining traditional knowledge
with existing scientific knowledge is limited; (iv) a formal institutional arrangement for CFM does not exist; and (v) community
members’ access to the hard technology of CFM is limited. Therefore, in addition to legalizing CFM, a formal institutional
framework for elaboration, implementation and control of CFM is essential to achieve sustainable CFM in Thailand. 相似文献