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Survey Study of Moso Bamboo Management Techniques Dissemination in Zhejiang

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chinese forestry Science and Technology 2010年第2期9卷 73-81页

作者： WANG Hong1,2.U Xiaowen3 JIN Aiwu3 LI Guodong3 FANG Wei 3 1. School of forestry, Beijing forestry University,Beijing 100083, P.R. China 2. {2. of Forest Resource and Information Techniques, chinese academy of forestry, Beijing 100091, P.R. China 3. Bamboo Research {2. of Zhejiang forestry University, Provincial Key Laboratory of Silviculture in Zhejiang forestry University, Lin’an 311300, P.R. China

By PRA survey to 1 2.5 farmer households of 10 key Moso bamboo (Phyllostachys pubescens) production counties, the source and demand of the management techniques in Zhejiang were studied. The conducted principal factor analysis revealed that experience and traditional knowledge are currently major technical sources of farmer households' Moso bamboo forest management techniques and that the demonstrative household is a highly expected technical source, in which the prime factor is interpersonal dissemination with the variable information making up 2..5% of the total. The paper thus suggests that following the nationwide collective forest tenure reform and forest land allocation to the households, the technical sources available to the households should be diversified, that technical training with site expert instruction be taken as priority in establishing demonstrative households for extension and that the current technical extension mode await improvement.

关键词： Moso bamboo participatory rural appraisal second-hand data forest tenure reform

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鄱阳湖湿地生态系统服务功能研究

水土保持学报 2004年第2期18卷 109-113页

作者：崔丽娟中国林业科学院林业研究所北京100091

鄱阳湖是中国最大的淡水湖泊,是吞吐性河成湖,被称为长江的天然水位调节器。作为一种特殊的湿地生态系统类型,鄱阳湖湿地效益类型丰富多样。主要的生态功能有涵养水源、调蓄洪水,调节气候,降解污染,固定C释放O2.控制侵蚀、保护土壤,参... 详细信息

鄱阳湖是中国最大的淡水湖泊,是吞吐性河成湖,被称为长江的天然水位调节器。作为一种特殊的湿地生态系统类型,鄱阳湖湿地效益类型丰富多样。主要的生态功能有涵养水源、调蓄洪水,调节气候,降解污染,固定C释放O2.控制侵蚀、保护土壤,参与营养循环,作为生物栖息地。主要直接的产品用途有储水、供水,生产湿地植物产品,生产湿地动物产品,能源生产,水运,休闲/旅游,作为研究与教育用地。鄱阳湖湿地属性主要有生物多样性,社会文化重要性。

关键词：鄱阳湖湿地生态系统服务功能生态功能

Relations Between Permeability and Structure of Wood

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forestry studies in China 2003年第1期5卷 34-38页

作者： Bao Fucheng ZhaoYouke Lu JianxiongResearch institute of Wood Industry, chinese academy of forestry, Beijing {2., P. R. China Research institute of Wood Industry Chinese Academy of Forestry Beijing 100091 P. R. China

The permeability and the structure of heartwood and sapwood of the solvent-exchange dried and the air-dried greenwood of chinese-fir (Cunninghamia lanceolata (Lamb.) Hook.) and masson pine (Pinus massoniana Lamb.) were measured in order to study the relations between the permeability and the structure. The results showed that the permeability of sapwood of both the air-dried and the solvent-exchange dried wood was higher than that of heartwood, and the permeability of the solvent-exchanged dried heartwood and sapwood was higher than that of the air-dried. A higher permeability of wood was attributed to, on the one hand, a bigger number of flow path per unit area of the wood perpendicular to the flow direction resulted from a bigger number of unaspirated pits per unit area and a bigger number of effective pit openings per membrane, and on the other hand, a smaller number of tracheid in series connection per unit length parallel to flow direction resulted from a longer tracheid length and an effective tracheid length for permeability.

关键词： chinese-fir masson pine wood permeability wood fine structure

Soil Microbial Population Dynamics along a Chronosequence of Moist Evergreen Broad-leaved Forest Succession in Southwestern China

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Journal of Mountain Science 2010年第4期7卷 327-338页

作者： ZHU Wanze CAI Xiaohu LIU Xingliang WANG Jinxi CHENG Song ZHANG Xiuyan LI Dengyu LI Maihe institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China Sichuan academy of forestry Chengdu 610081 China Siehuan Agricultural University Yaan 625014 China Swiss Federal Research institute WSL Zuereherstrasse 111 CH-8903 Birrnensdorf Switzerland

Little is known about whether soil microbial population dynamics are correlated with forest *** test the hypotheses that(1) soil microbial composition changes over successional stages,and(2. soil microbial diversity is positively correlated with plant species diversity,we determined the soil microbial populations,community composition,and microflora diversity in evergreen broad-leaved forests along a chronosequence of vegetation succession from 5 to 300 years in southwestern *** soil microbial community was mainly composed of bacteria(87.1-98.7% of the total microorganisms and 10 genera identified),fungi(0.3-4.0%,7 genera),and actinomycetes(2.1-9.1%,8 species and 1 genus).There were significant differences in soil microbial populations among different successional stages and within the four *** seasonal variations of the soil microbial community may be associated with the seasonal changes in environmental *** changes in soil microbial diversity(Shannon-Wiener index) with successional time followed one-humped,convex curves peaked at-100 years since restoration,which is identical with the trends of the aboveground plant *** plant diversity resulting in enhanced nutrient flow and root exudation may contribute to positive relationships between the soil microbial diversity and plant ***,decreases in soil microbial diversity in the late-successional stages appear to be related to the net loss in species richness that occurs after 100 years since *** findings confirm the intermediate disturbance hypothesis that suggests diversity peaks at midsuccessional stages.

关键词： Actinomycetes Bacteria Fungi Microbial diversity Moist evergreen broad-leavedforest Seasonal dynamics

Study of Ultra-drying on Vigor and Physiological Characteristics of Lespedeza bicolor Seeds

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chinese forestry Science and Technology 2010年第2期9卷 56-61页

作者： LIU Yan1 LIU Guangquan1,2.3 LI Qingmei4 DUAN Xinfang5 HOU Longyu1 1. International Research and Training Center on Erosion & Sedimentation, Beijing 100048, P.R. China 2. China institute of Water Resources and Hydropower Research, Beijing 100048, P.R. China 3. Northwest Agricultural and forestry University, Yangling 712.00, P.R. China 4. Research institute of forestry, chinese academy of forestry, Beijing 100091, P.R. China 5. institute of New forestry Technology, chinese academy of forestry, Beijing 100091, P.R. China

Ultra-drying (in a desiccator with silica gel) and accelerated aging (50 oC, 30 d) of Lespedeza bicolor seeds from the arid and semiarid areas of northwest China were studied. The results showed that in the moisture content of seed ( 43?70 g/kg), germination percentage and vigor indices had no significant differences; ultra-dried seeds had a stronger anti-aging ability than those with natural drying, and the best MC for the storage was 43 g/kg. Therefore, it was feasible to store L. bicolor seeds with ultra-dried moisture content.

关键词： ultra-drying germination percentage vigor index relative conductivity enzyme activity Lespedeza bicolor

chinese Forest Eco-Network System

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chinese forestry Science and Technology 2002年第1期1卷 26-32页

作者： PENG Zhenhuachinese academy of forestry, Beijing 100091. China

Based on the current status of nature, economy and society, and in the light of interconnected patterns of material, energy and information flows, the Forest Eco-Network System in China (CFENS) is to be established to harmonizes the development of human, nature and society in this country, which is of integrity, multi-function, high efficiency and operability, and views the whole mainland as an ecosystem with different big parches consisting of different types of forests, grasslands, flelds, barren hill...

关键词： forest eco-network system sustainable development

Research Review of Post-Evaluation for Comprehensive Benefits of forestry Ecological Programs

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chinese forestry Science and Technology 2008年第3期7卷 16-24页

作者： LIU Yong1 CHEN Jie1 ZHI Ling2.1. Research institute of forestry Policy and Information, {2., Beijing 100091, P.R. China 2. School of Economics and Management, Southwest forestry College, Kunming 6502.4, P.R. China

The paper summarized the meaning of post-evaluation for comprehensive benefits of forestry ecological programs, discussed and reviewed its development process in terms of content, indicators and methodologies, and finally presented its development trend from the perspectives of theoretical research, methodological research and application research.

关键词： forestry ecological programs post-evaluation comprehensive benefits

Finite Element Analysis of Die Geometry and Process Conditions Effects on Equal Channel Angular Extrusion for β-Titanium Alloy

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Journal of Iron and Steel Research International 2012年第10期19卷 54-58页

作者： SI Jia-yong1,2. GAO Fan3, ZHANG Ji3 (1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China 2. College of Mechanical and Electrical Engineering, Central South University of forestry and Technology, Changsha 410004, Hunan, China 3. High Temperature Material Research Division, Central Iron and Steel Research institute, Beijing 100081, China) [a] State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 Hunan China [b] College of Mechanical and Electrical Engineering Central South University of Forestry and Technology Changsha 410004 Hunan China [c] High Temperature Material Research Division Central Iron and Steel Research Institute Beijing 100081 China

The finite element analysis was applied to evaluate the respective influences of die geometry and process conditions on plastic strain distribution for β-titanium (Ti-13V11Cr3Al) alloy during the equal channel angular extrusion (ECAE). It was found that optimum equal channel angular extrusion die geometry is strongly material dependent. Optimal strain homogeneity in the Ti-13V11Cr3Al alloy may be achieved at r (inner radius)=5 mm, R (outer radius)=3 mm. The equivalent plastic strain increases with increasing friction coefficient. And the better homogeneity of the equivalent plastic strain distribution can be achieved when friction coefficient value is lower. The faster the ram speed is, the lower the homogeneity of the equivalent plastic strain distribution is and the influence is slight. The back-pressure does not help to improve the plastic strain homogeneity, and the increasing temperature has a slightly favourable effect on the plastic strain homogeneity between 400 and 600 ℃.

关键词： equal channel angular extrusion finite element analysis die geometry β-titanium

Effect of Ultra-drying on Vigor and Physiological Characteristics of Ziziphus jujuba var spinosa Seeds

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chinese forestry Science and Technology 2009年第4期8卷 34-40页

作者： LIU Yan1 LIU Guangquan1,2.3 LI Qingmei4 DUAN Xinfang5 HOU Longyu1 1. International Research and Training Center on Erosion & Sedimentation, Beijing 100048, P.R. China 2. China institute of Water Resources and Hydropower Research, Beijing 100048, P.R. China 3. Northwest Agricultural and forestry University, Yangling 712.00, P.R. China. 4. Research institute of forestry, chinese academy of forestry, Beijing 100091, P.R. China 5 institute of New forestry Technology, chinese academy of forestry, Beijing 100091, P.R. China

Using ultradry method and accelerated aging, storage behavior of Ziziphus jujuba var spinosa seeds with MC of 15-80 g/kg was studied. The results showed that seeds with MC of 2.-80 g/kg could maintain the stabilization in germination percentage, vigor, relative conductivity, and enzyme activities; and during the ageing the seed storability increased with the moisture content decreased to 2. g/kg. Thus, it was feasible for the seeds to be stored under the ultra-dried condition.

关键词： ultra-drying germinability vigor enzyme activities Ziziphus jujuba var spinosa