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NEW STEROIDAL coNSTITUENTS FROM AMALOCALYX YUNNANESIS----Ⅰ.

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Chinese Chemical Letters 1991年第9期2卷 685-686页

作者： Ying Jie HU Xiao Ling SHEN,Laboratory of Phytochemistry,southwest forestry co.lege,{3. 6502.4 Quan Zhang MU,Laboratory of Phytochemistry,{3. Institute of Botany,Academia Sinica Yang LU Qi Tai ZHENG Institute of Materia Medica,Chinese Academy of Medical Sciences.

Two C_(21)-steroids,named amalogenin A amd amaloside A were isola- ted from the rhizome of Amalocalyx *** structures were estab- lished by analysis on the spectra of NMR including ~1H-~1H cosy,^(13.C-~1H coSY and conf... 详细信息

关键词： ppm NEW STEROIDAL coNSTITUENTS FROM AMALOCALYX YUNNANESIS

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correlations between the ages of Alnus host species and the genetic diversity of associated endosymbiotic Frankia strains from nodules

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Science china(Life Sciences) 2005年第z1期48卷 76-81页

作者： DAI Yumei, ZHANG Chenggang, XIONG Zhi & ZHANG Zhongze Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, china Graduate School of the Chinese Academy of Sciences, Beijing 10003., china School of Forest Resources, southwest {3. co.lege, kunming 6502.4, china 1. Institute of Applied Ecology Chinese Academy of Sciences 110016 Shenyang China 2. Graduate School of the Chinese Academy of Sciences 100039 Beijing China 3. School of Forest Resources Southwest Forestry College 650224 Kunming China

Nodule samples were collected from four alder species: Alnus nepalensis, A. sibirica, A. tinctoria and A. mandshurica growing in different environments on Gaoligong Mountains,Yunnan Province of southwest china and on Changbai Mountains, Jilin Province of Northeast china. PCR-RFLP analysis of the IGS between nifD and nifK genes was directly applied to uncultured Frankia strains in the nodules. A total of 21 restriction patterns were obtained. The Frankia population in the nodules of A. nepalensis had the highest genetic diversity among all four Frankia populations; by contrast, the population in the nodules of A. mandshurica had the lowest degree of divergence; the ones in the nodules of A. sibirica and A. tinctoria were intermediate. A dendrogram, which was constructed based on the genetic distance between the restriction patterns, indicated that Frankia strains from A. sibirica and A. tinctoria had a close genetic relationship. Frankia strains from A. nepalensis might be the ancestor of Frankia strains infecting other Alnus species. From these results and the inference of the ages of Alnus host species, it is deduced that there was a co-evolution between Alnus and its microsymbiont Frankia in china.

关键词： Frankia, Alnus, genetic diversity, co-evolution.

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Simulated distribution and sensitivity of vegetation types in china in the past 100 years and future

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Simulated distribution and sensitivity of vegetation types i...

2009 International conference on Environmental Science and Information Application Technology

作者： Chen Xu computer&Information Science Departmen southwest forestry University kunming {3. Zhang Yaping State Key Lab of CAD&CG Zhejiang University Hangzhou {3.

What is the relationship between vegetation patterns and climate changes in china?The geographic distribution of vegetation types in china in the past 100 years and future was simulated based on climatology using a small set of plant functional types（PFTs）embedded in the biogeochemistry-biogeography model *** show that as time goes by,vegetation sensitivity to climate change is a increasing trend with kappa coefficient and crucial changes occur in last 20 *** the future climate scenario,the change of vegetation increases significantly,and increased co2 concentration would potentially lead to big changes in china vegetation *** the vegetation sensitivity to climate change has heterogeneity because of the complex topography in china.

关键词： BIOME4 model Climate change Vegetation pattern

A comparative study of pixel level and region level classification of land use types using QuickBird imagery

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A comparative study of pixel level and region level classifi...

2010 Second IITA International conference on Geoscience and Remote Sensing (IITA-GRS 2010)

作者： Leiguang Wang School of Resource Science southwest forestry University kunming P. R. of{3. Chen Zheng School of Mathematics and Statistics Wuhan University Wuhan P. R. of{3. Qinling Dai School of Wood Science and Interior Design southwest forestry University kunming P. R. of{3. Cancai Wang School of Polymer Science and Engineering Qingdao University of Science & Technology Qingdao P. R. of{3.

The availability of high-resolution （HR） remote sensing multispectral imagery brings opportunities and challenges for land cover/use classification. combination of pixel based spatial feature extraction with spectral feature and region based image classification both are strategies applying to the challenges. However, it is still opening question which strategies can provide higher classification accuracy. Using QuickBird multispectral image in the suburb of Wuhan, china, we evaluate two strategies using the same feature sets and similar classifier. The results show that: 1).a combination of spectral and texture features can improve image classification accuracy;2). The region level classification method does not necessarily show higher accuracy than the pixel-based method with the same parameter sets and the segmentation result has great influence on the classification accuracy of region based method.

关键词： image classification comparison pixel level region level

Strategies on natural forest protection of collective forest area in minority nationality community in china─A case of the forest resource management in datu village

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Journal of forestry Research 2000年第2期11卷 132-134页

作者：罗明灿覃家理刘思慧江兴龙 southwest forestry co.lege Kunming P.R. China (GRID:grid.412720.2) (ISNI:***) forestry Bureau of Libo county Guizhou Province P.R. China (GRID:grid.412720.2)

In the recent 20 years, it is a trend that forest will be distributed to villagers to manage in the *** in china, "forestry three determinations" has been carried out since 1980, and many new forestry devolutionshave been put fotward to and come into being. To face the fact of overusing up natural forest to result in the deterioration of ecology environment, the strategy of naturaf forest protection project (NFPP) is raised after the heavyflood in 1998. Now, it i s paid close attention to systematically study to carry Out the strategies of NFPP in collective forest area, especially in the community of minority nationalities. Based on the case of forest resource management in Datu Miao Village, the experience of its forest management in the past is analyzed and the strategies of NFPP in collective forest area are put forward.

关键词： Forest resource management Natural forest protection

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西藏灌木林遥感分类方法对比研究

山地学报 2010年第5期28卷 572-578页

作者：张超黄清麟朱雪林张晓红普布顿珠旦增西南林业大学资源学院中国林业科学研究院资源信息研究所国家林业局林业遥感与信息技术重点实验室西藏自治区林业调查规划研究院

以西藏主要类型灌木林为对象,开展外业遥感调查,分别应用非监督分类、监督分类、基于空间分布特征的辅助分类和基于光谱特征再分类4种方法,对灌木林类型进行了遥感分类识别,并对各种分类方法所得到的分类结果进行对比评价。研究表明,非... 详细信息

以西藏主要类型灌木林为对象,开展外业遥感调查,分别应用非监督分类、监督分类、基于空间分布特征的辅助分类和基于光谱特征再分类4种方法,对灌木林类型进行了遥感分类识别,并对各种分类方法所得到的分类结果进行对比评价。研究表明,非监督分类和监督分类的总体精度分别为42.20%和46.79%,除了对沙棘灌木林分类精度较高外,对其他灌木林类型分类精度均较低;基于空间分布特征的辅助分类精度为86.24%,其分类结果未能识别到具体灌木林类型;基于光谱特征的再分类精度为70.64%,对沙棘、红柳能较准确的识别,而对个别灌木林类型(如杜鹃和小檗)的识别精度不高。

关键词：西藏灌木林遥感分类空间分布特征光谱特征

Advances in Research on Vegetative Incompatibility in Fungi

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食用菌学报 2007年第1期 78-84页

作者： CHEN Qiang1,LI Cuixin1, 2,LI Huiping1,ZHANG Jinxia11Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081,china 2School of Natural Resources, southwest forestry University, {3.,Yunnan 6502.4,china

Recent progress in the research techniques applied to the study of vegetative incompatibility in fungi, and the genetic basis and applications of the phenomenon, have been summarized. The role of heterokaryon incompatibility (het) loci in controlling vegetative incompatibility has been described, and the accuracy of using vegetative incompatibility to discriminate between fungal strains discussed.

关键词： Fungi Genetic basis Heterokaryon incompatibility (het) loci Vegetative incompatibility

上海电大“国内质量评估”与“国际质量评审”比较研究

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学园 2010年第6期 55-61页

作者：费毛毛西南林业大学

上海电视大学是国内唯一的一所既参与过教育部组织的质量评估和国际开放与远程教育协会质量评审的学校。因此,本研究透过上海电视大学这个个案,运用内容分析法对教育部开展的国内质量评估和国际开放与远程教育协会(ICDE)开展的国际质量... 详细信息

上海电视大学是国内唯一的一所既参与过教育部组织的质量评估和国际开放与远程教育协会质量评审的学校。因此,本研究透过上海电视大学这个个案,运用内容分析法对教育部开展的国内质量评估和国际开放与远程教育协会(ICDE)开展的国际质量评审的评价内容进行比较分析,并运用质性访谈的方法对10名与远程高等教育外部质量保证有关的人员进行了深度访谈,从而提出了相应的完善策略,以期为我国远程高等教育外部质量保证的完善和提升提供一定的参考。

关键词：远程高等教育上海电大国内质量评估国际质量评审

PRELIMARY STUDY ON ALLELOPATHY OF THE DIFFERENT TISSUES OF EUCALYPTUS SMITHII

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PRELIMARY STUDY ON ALLELOPATHY OF THE DIFFERENT TISSUES OF E...

中国第三届植物化感作用学术研讨会、第八届全国杂草科学大会、联合国粮农组织——中国“水稻化感作用论坛”

作者： Fu-ke YU ~(*1),Xin-hui HUANG ~2,Chang-qun DUAN~1 and Yong-qing MA~3.1 Laboratory for conservation and Utilization of Bio-Resource & School of Life Science,Yunnan University,kunming,Yunnan 650091,china 2 Department of Environment Science and Engineering,southwest {3. co.lege,kunming,Yunnan 6502.4,china 3.Institute of Soil and Water conservation,Chinese Academy of Sciences and Ministry of Water Resources, Yangling,Shaanxi 712100,china

Introduction of Eucalyptus species has effectively promoted wood industry in ***, large scale planting of Eucalyptus trees has seriously influenced healthy development of regional ecological ***,conducting researches of allelopathy in Eucalyptus species is significant to regional ecological safety and biodiversity *** this study,Eucalyptus

关键词： Eucalyptus smithii Allelopathy