FSC与ISO森林认证体系比较及在我国适应性研究

本文针对当前世界上使用最为广泛的两种森林认证体系—ISO14 0 0 0和FSC进行了多方面比较分析 ,并对这两种认证体系在我国适应性进行了研究。结果表明 ,就目前我国森林经营实际而言 ,进行大面积基于业绩标准的FSC森林认证的条件尚未成熟 ,建议进行基于进程标准的ISO14 0 0 0森林认证 ,这样能够更好地提高我国森林经营水平 ,从而实现森林的可持续经营     

美国西加云杉出国考察报告

简要介绍了西加云杉的生物生态学特性及其生境条件 ,并提出了该树种引种的研究方向。     

Study on Growth and Genetic Gains of Different Families in Eucalyptus urophylla Second Generation Seed Orchards

A second-generation seedling seed orchard including 32 open-pollinated families of Eucalyptus urophylla was built at Gaoyao City, Guangdong Province to examine the genetic performance of the orchard, which were selected from the superior trees in an improvement seed orchard. Compared to the characteristics of height, DBH, individual volume, stem form, branch and blossom quantities among different families at 22 months. The results indicate that: (1) The most superior families in individual volume and blossom quantities include No. 11,8,40,27 and 2 families; (2) With the 50%-selected rate, the genetic gain of individual volume of the superior families from seed orchard was estimated to be 4.84%.     

中美森林法比较及其对我国森林法修改的启示

通过比较中美森林法的历史和现状，指出森林法修改和完善的紧迫性且时机已经成熟，以及森林法修改要重视理论研究和实际情况调查。我国森林法修改和完善可以借鉴美国森林法中的森林生态系统管理等先进理念。对美国《国有林管理法》与《中华人民共和国森林法》的结构与体例、立法精神、科学的地位、公众参与等内容进行了比较研究，据此给出一些《中华人民共和国森林法》的修改建议。     

菌材伴栽与天麻高产栽培技术研究

菌材伴栽与培育栽培天麻法与室外林地常规田字格栽培法、菌材+枝条栽培法、双层菌材栽培法和单层菌材栽培法比较,菌材伴栽法能显著提高天麻产量、生物效益、产值和投入产出比等各项经济技术指标,减少了菌材提前培育过程。该方法实用性强,具有应用和推广价值。     

福建省林业检查站现状与改进对策

通过对福建省99个林业检查站工作现状的调查,作者认为:1)林业检查站在有效地维护木材、野生动植物的正常运输,有效地打击违法运输,有效防止和制止有害生物传播等方面发挥了巨大的作用;2)林业检查站主要面临着工作条件艰苦,人员少任务重,执法环境差等问题;3)存在问题的主要原因是管理体制不顺,各级政府及主管部门对林业检查站的作用认识不足,相关部门协调沟通不够;4)建议今后要有效整合执法力量、理顺管理体制,加大资金投入力度,协调道路运输各相关部门配合工作。     

Signals of summer drought in crown condition data from the German Level I network

Crown transparency estimates of Scots pine, Norway spruce, common beech, pedunculate and sessile oak, annually surveyed between 1990 and 2004 within a grid over Germany, provide a suitable response variable to study drought effects on forest trees. Major climatic factors, available on a monthly basis as plot-specifically interpolated values and parameters of site and stand conditions, biotic and other relevant factors were used as predictors in different cross- and length-sectional, and longitudinal models. Stand age is a considerable and most constant driver of crown transparency in all species. Pine, spruce and beech responded—mainly with a delay of 1 year—with some foliar loss in areas where there was a surplus of temperature after the generally hot and dry summer of 2003. Parallel time-series analyses delivered species-specific geographic large-scale patterns with delayed or recent precipitation deficits or temperature surpluses. Even if beech is partly responding in current years with leaf loss towards precipitation surpluses, defoliation is especially high 1 year after hot summers, partly a result of high seed sets after such summers. Crown condition of oak responds in dry and warm areas according to the drought stress hypothesis, however, in cool and wet mountainous ranges oak responds after wet summers with higher defoliation. Longitudinal approaches revealed for all 4-tree species significant relationships between crown condition and deviations from the long-term means of temperature, precipitation but also global radiation and wind speed. Results do not always match the drought stress hypothesis, however, this is not to expect considering the heterogeneous site, stand and climatic conditions across Germany. Complex interactions of climatic and biotic factors also impede simple relationships. Soil-related clusters reveal higher sensitivity of spruce and beech towards climatic drought factors on more acid soils with thin humus layers. Also clusters constructed from plot-specific courses of defoliation reveal groups with rather closer relationships like a group of pine plots in the Oberpfalz, which seems to be especially sensitive to summer drought.     

滚筒式马铃薯清洗机的设计研究

本文对滚筒式马铃薯清洗机的设计进行了研究 ,并对实际使用中反馈的信息进行分析 ,进一步完善了滚筒式马铃薯清洗机的设计。     

大兴安岭生态产业体系战略研究

保护与建设好大兴安岭生态环境产业 ,不仅是东北经济、社会发展的最基本需要 ,而且是改善中华民族的生存环境、实现可持续发展的战略需要。     

云南CDM林业固C项目的可行性研究

通过对《联合国气候变化的框架公约》和《京都议定书》中一些与林业相关的条款及CDM林业固C项目作了简要介绍，结合云南的具体情况，对CDM林业固C项目在云南开展的可行性作了分析。结果如下：云南有开展林业CDM项目的良好条件，可促进生态效益补偿制度的建立，将有力促进云南省林业发展与生态建设；建议开展云南林业的固C效益与固C潜力，固C造林技术与模式，国际认可的林业CDM项目技术、程序与方法等研究。应积极实施林业CDM项目试点，开展国际合作，培养相关人材，通过国家相关部门积极申报林业CDM固C项目。