农学 >>> 林学 >>> 林业基础学科 林木遗传育种学 森林培育学 森林经理学 森林保护学 野生动物保护与管理 防护林学 经济林学 园林学 森林统计学 林业经济学 林学其他学科
搜索结果: 31-45 共查到林学 tree species相关记录53条 . 查询时间(0.175 秒)
In summit parts of the Orlické hory Mts., massive dieback of forests occurred during an air pollution/ ecological disaster in the 70s to the 80s of the 20th century. Destroyed stands were cut down an...
This paper describes the automated classification of tree species composition from Ikonos 4-meter imagery using an object-oriented approach. The image was acquired over a man-planted forest area with ...
The paper is a contribution to the research on problems of thinnings in mixed (spruce-fir-beech) stands situated in the 5th forest altitudinal zone (beech with fir) in the central part of...
The paper documents the effects of forest stands of different species composition on the humus form state and soil profile chemistry. It compares the situation in mixed broadleaved (ash, oak, hornbeam...
Rare forest tree species that are necessary for the domestic processing industry, especially for the furniture industry, currently occur as scattered trees in many forest stands in theCzechRepublic. F...
The original natural forest ecosystems of the OreMountains(Norway spruce, silver fir, and beech forests) have been destroyed by overcropping since the 11th century. In the 19th century spruce afforest...
The tree species composition of forests in the Czech Republic has changed due to the human impact over the time. Nowadays, the idea of reducing the area with spruce stands and of increasing the area w...
Genetic variation within and among foundation plant species is known to affect arthropod, plant and soil microbial communities. We hypothesized that the same would be expected for pathogen communitie...
Fodder and fuel wood deficiency in the Himalayan region is well recognized. Rural inhabitants are exploiting these forest resources for their livelihood for generations which leads to severe deforesta...
Local communities depend on Kalinzu Forest Reserve (KFR) for plant resources. This resource utilization affects the population of tree species in the forest. This study set out to estimate the populat...
Premise of the study : Seabirds often cause signifi cant changes to soil properties, and seabird-dominated systems often host unique plant communities. This study experimentally (1) examined s...
Models clearly show that the coexistence of competing species depends on those species responding differently to the availability of resources. Then why do studies comparing competing tree species dra...
Effect of salinity on growth of some forest tree species was studied at their seedling stage in nursery net house, Department of Forestry, Range Management and Wildlife, University of Agriculture, Fai...
I evaluated the difference in the topography-dependent pattern of tree species distribution in a subtropical evergreen broad-leaved forest in the northern part of Okinawa Island. The values and spatia...
We analyzed data from three typhoons to characterize typhoon damage in a lucidophyllous forest at the Aya Long-term Ecological Research (LTER) Site located in Miyazaki Prefecture, Japan. We calculated...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...