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chinese forestry Science and Technology 2008年第1期7卷 88-92页

作者： HOU Longyu1,2.DUAN Xinfang2.Li Qingmei3 LIU Guangquan4 MA Fengyun1 1. forestry College of Shandong Agricultural University, Tai’an 2.1018, P.R. China 2. Research institute of New forestry Technology, chinese academy of forestry, Beijing 100091, P.R. China 3. Research institute of forestry, chinese academy of forestry, Beijing 100091, P.R. China 4. Northwest Agriculture and forestry University, Yangling 712.00, P.R. China

In order to supply quality seed for vegetation restoration in arid and semiarid areas of Northwest China, the effects of Platycladus orientalis seed storage under ultra-drying and accelerated aging were studied. The seeds were dried from 6.8% to 5.1%, 4.4%, 3.7% and 2.2. MC, respectively, in a desiccator with the silica gel. The germination energy, germination percentage, germination index and vigor index of the seed were investigated. After ultra-drying, groups of seeds were carried on the accelerated aging tests in an oven at 50 oC for 10, 2. and 30 d , respectively, and the physiological indexes, including relative conductivity, dehydrogenase activity and α-amylase activity were tested. The results show that the ultra-dried seeds with 3.7% MC have the highest germination energy, germination percentage, germination index and vigor index. After aging, the dehydrogenase activity and α-amylase activity of the group of seeds of 3.7% MC were higher than those of 6.8%, while the relative conductivity of the group of 3.7% is lower than that of 6.8%. It is feasible to ultra- dry the seeds with 3.7% MC.

关键词： ultra-dry viability dehydrogenase activity α-amylase activity Platycladus orientalis seed

Sandstorms and desertification

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Journal of Geographical Sciences 2000年第3期10卷 99-102页

作者： CHEN Zhi-qing1, ZHU Zhen-da2.(1.institute of Geographic Sciences and Natural Resources Research, chinese {2. of Sciences, Beijing 100101, China 2. institute of Dsert Research, chinese {2. of Sciences, Beijing 100101, China)

Sandstorm is a frequently occurred disastrous weather in northern China. The increasing occurrence frequency recently, especially the much more frequently occurred sandstorms with high intensity in the spring of 2.00 have caused great loss to national economy. The combination of strong wind, exposed sandy soil on ground surface and unstable air current constitutes the necessary conditions for the sandstorms. However, the accelerated desertification process resulting from irrational human economic activities is responsible for the accelerated sandstorms. The effective measures to mitigate sandstorm lie in strengthening desertification control and eco-environmental protection.

关键词： sandstorm generating conditions desertification eco-environmental protection

Problems in Fast-growing and High-yield Plantation Ecosystem Management and Their Countermeasures in China

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chinese forestry Science and Technology 2010年第2期9卷 13-23页

作者： WANG Dengju HUANG Lili Research institute of forestry Policy and Information, {2., Beijing 100091, P. R. China

The paper analyzed the basic characteristics of fast-growing and high-yield plantation, classified and identified the ecological problems in its development, and finally proposed the basic principles and corresponding... 详细信息

关键词： fast-growing and high-yield plantation characteristic problem ecosystem management technical measure

The roles of a decision support system in applying forest ecosystem management in Northeast China

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Science China(Technological Sciences) 2006年第z1期49卷 9-18页

作者： DAI Limin, ZHENG Bofu, Guofan Shao & ZHOU Li State Key Lab of Systems Ecology, Research Center for Eco-Environmental Sciences, chinese academy of Sciences, Beijing 100085, China {2. of Applied Ecology, chinese academy of Sciences, Shenyang 110016, China Department of forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA Graduate University of chinese academy of Sciences, Beijing 100101, China 1. State Key Lab of Systems Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China2. Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China3. Department of Forestry and Natural Resources Purdue University West Lafayette IN 47907 USA4. Graduate University of Chinese Academy of Sciences Beijing 100101 China

Forest ecosystems provide a variety of services and forest ecosystem management (FEM) is an effective approach to maximize the services. Because of the complexity of forest ecosystems, the applications of FEM can be facilitated with decision support systems (DSS) that recognize and incorporate ecological and socio-economic variables. With the rapid development of computation and information technologies, DSS have been advanced in many ways. Traditional forest management within a forestry unit in China is planned on a yearly basis. The planning itself remains primarily a verbal concept as there are no quantitative decision-support tools available to translate the concept into forest management actions. For the purposes of FEM at the management level, a forest management DFF, FORESTAR, has been developed under a framework of geographic information system (GIS) and forest models. The paper explained the intelligent modeling mechanisms and demonstrated how the applications of FEM can be strengthened with the applications of FORESTAR.

关键词： forest functions, forested landscapes, forest services, forest models, geographic information systems.

Evolution of desertification in a two-dimensional energy balance model coupled with thermodynamics and dynamics

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Science China Earth Sciences 2010年第11期53卷 1726-1733页

作者： CHAO JiPing1,2.& LI YaoKun3,4 1National Marine Environmental Forecasting Center, Beijing 100081, China 2.irst institute of Oceanography, State Oceanic Administration, Qingdao 2.6061, China 3State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, institute of Atmospheric Physics, {2. academy of Sciences, Beijing 10002., China 4Graduate University of {2. academy of Sciences, Beijing 100049, China 1. National Marine Environmental Forecasting Center Beijing 100081 China2. First Institute of Oceanography State Oceanic Administration Qingdao 266061 China3. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China

The relationship between desert evolution and change in albedo has been investigated quasi-analytically using a zonal mean two-dimensional energy balance model which considers the radiation transmission process due to thermodynamics and bound- ary layer movement caused by kinetics. A climate state including temperature, zonal wind, meridional wind and vertical wind can be simulated according to the current zonal distribution of albedo. Given desert distribution, characterized by the value and distribution of albedo, the response of climate on albedo has been studied to analyze the evolution of desert climate. One significant result is that the simple model can reproduce mean meridional circulation. Another result indicates that climate corresponds to two equilibria. This happens when the junction temperature between vegetation and desert is higher than a certain critical value. As for the first equilibrium, the desert belt is predicted to move southward in the northern hemisphere with the increasing values of albedo, which corresponds to the current trend of climate change. For the second equilibrium, vegetation will expand northward with increasing values of albedo, which would indicate a narrowing of the desert belt. In order to determine if the two equilibria exist, new physical models are needed.

关键词： two-dimensional energy balance model desertification two equilibria

Simulation of soil erosion dynamics in grassland ecosystem of semi-arid China using the CENTURY model

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Journal of Geographical Sciences 2000年第3期10卷 81-86页

作者： ZHANG Jia-hua1, FU Cong-bin 1 ,YAO Feng-mei 2.(1. START, institute of Atmospheric Physics, chinese {2. of Sciences, Beijing, 10002. China 2. Beijing forestry University, Beijing 100083, China)

Soil erosion can cause considerable effect on global natural resources and eco-environment. In the paper, the CENTURY model has been used to simulate soil erosion in Xilin Gol Grassland of Inner Mongolia. The results showed before the 1960s, the soil erosion amount was over 2.kg /m2.a in grassland ecosystem in the study area because no trees had been planted. But after the 1960s the mean annual accumulator C lost from soil organic matter due to soil erosion was only 0.3 kg /m2.a in forest ecosystem. So afforestation has exerted notable effect on decreasing soil erosion amount in Xilin Gol Grassland.

关键词： soil erosion CENTURY model grassland ecosystem semi-arid environment

Change of surface cover greenness in China between 2.00 and 2.10

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chinese Science Bulletin 2012年第22期57卷 2835-2845页

作者： LIU Shuang1,4& GONG Peng1,2.31State Key Laboratory of Remote Sensing Science, Jointly Sponsored by institute of Remote Sensing Applications of chinese {2. of Sciences,and Beijing Normal University, Beijing 100101, China 2.0} for Global Change studies & Center for Earth System Science, Tsinghua University, Beijing 100084, China 3Department of Environmental Science, Policy and Management, University of California, Berkeley, CA9472., USA 4Graduate University of chinese {2. of Sciences, Beijing 100049, China State Key Laboratory of Remote Sensing Science Jointly Sponsored by Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing China Graduate University of chinese academy of Sciences Beijing China institute for Global Change studies & Center for Earth System Science Tsinghua University Beijing China Department of Environmental Science Policy and Management University of California Berkeley USA

Surface greenness reflects the situation of vegetation *** index calculated from the Red and Near Infrared bands of remote sensing images,whose values indicate the level of photosynthetic activity,is monotonically related to surface greenness when vegetation canopy does not fully cover the background *** for desert regions,vegetation index is positively correlated with vegetation ***,vegetation index can be used to study the change in greenness of desert *** study collected MODIS Normalized Difference Vegetation Index (NDVI) data from 2.00 to 2.10 and analyzed their change over China in this *** results showed that an increasing trend of NDVI occurred over 66.84% (OLS fitting) or 64.2.% (LAD fitting) of China,indicating that China's greenness is increasing ***,desertification of China *** showing large increase in greenness are found in Shaanxi,Shanxi,Ningxia,Henan,Shandong,Qinghai,and Gansu while regions with large decrease in greenness are found in Northeast Inner Mongolia,South Tibet,Jiangsu,and *** of Qinghai,Gansu,Xinjiang and South Tibet could probably be driven by climate *** of greenness in Northeast Inner Mongolia was related to agricultural *** of greenness in Jiangsu and Shanghai was related to rapid *** factors did not exhibit obvious correspondence to the large increase in greenness in Shaanxi,Shanxi,Ningxia and Gansu,indicating that the changes might have been caused by human *** reduction of desert areas in China could probably have been caused by human management and protection at the national scale.

关键词：中国地表覆盖归一化植被指数植被覆盖度沙漠地区 NDVI 西藏南部气候因素

Current Status and Development Prospect of Carbon Sequestration forestry in China

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chinese forestry Science and Technology 2009年第4期8卷 41-47页

作者： MENG Xiangjiang HOU Yuanzhao Research institute of forestry Policy and Information, {2., Beijing 100091, P. R. China

Carbon sequestration forestry plays an important role in climate change and global warming mitigation, and thus gains more and more attention around the world. The paper introduced the concept, the significance and the status of carbon sequestration forestry in China, discussed existing issues and put forward countermeasures and suggestions to address these issues. Finally, development prospect of carbon sequestration forestry was analyzed.

关键词： carbon sequestration forestry climate change development perspective

Emissions of volatile organic compounds from heated needles and twigs of Pinus pumila

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Journal of forestry Research 2011年第2期22卷 243-248页

作者： ZHAO Feng-jun SHU Li-fu WANG Qiu-hua WANG Ming-yu TIAN Xiao-ruiinstitute of Forest Ecology,Environment and Protection,chinese academy of forestry Forest Protection Laboratory of State {2. Administration,Beijing 100091,P.R.China. institute of Forest Ecology Environment and Protection Chinese Academy of Forestry Forest Protection Laboratory of State forestry Administration Beijing P. R. China

A study was conducted to explore the mechanism that emissions of volatile organic compounds（VOC） from heated needles and twigs（2.0°C,within 15 min） of Pinus pumila affect fire behaviours using the technology of Thermal Desorption-Gas Chromatography-Mass Spectrometry（TD-GC-MS）.The results indicated that the main components of VOC from heated needles and twigs are *** of these terpenoids are *** account for 72.93% for the needles and 92.40% for the twigs of the total VOC,and their emission ratios are 61.2.0 μg·g-1 and 2.7.060 μg·g-1 *** twigs can emit more terpenoids than heated needles because twigs had more volatile oils than *** actual fires,these large amounts of terpenoid emissions,especially the monoterpene emissions,have strong effects on fire behaviors that are not only in the initial stage but also in the fast propagation stage of *** flammable gases are capable of causing violent combustion and creating crown *** addition,if these gases accumulate in an uneven geographical area,there will be a possible for eruptive fires and/or fires flashover to occur.

关键词： forest fire Pinus pumila volatile oil volatile organic compounds(VOC) terpenoids

Application of Public-Private Partnership in Land Degradation Control and A Case Study

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chinese forestry Science and Technology 2011年第4期10卷 1-10页

作者： Wang Dengju Chen Jie Research institute of forestry Policy and Information, {2., Beijing 100091, P. R. China

The paper reviewed the background of public-private partnership (PPP) development, described PPP concept, characteristics and basic models, and analyzed the necessity and feasibility to develop land degradation control PPP. Then the experiences that Elion Resources Group in Inner Mongolia has accumulated in Kubuqi Desert control and development as well as the revelations were summarized with the hope to provide reference for establishing land degradation control PPP in arid area of western region.

关键词： land degradation public-private partnership characteristic model experience revelation