搜索结果: 46-60 共查到“知识库 林学其他学科”相关记录165条 . 查询时间(4.762 秒)
Static stability of forest stands in the seventh altitudinal vegetation zone in Slovakia
Norway spruce wind firmness slenderness ratio
2015/1/28
Models evaluating static stability (resistance to breaking or uprooting of trees caused by wind, snow or ice) of forest stands in the seventh altitudinal vegetation zone were determined. The empirical...
Vegetation changes in beech and spruce stands in the Orlické hory Mts. in 1951–2001
mountain forests beech and spruce stands plant cenology
2015/1/28
Plant cenological surveys on the basis of Braun-Blanquet’s seven-point scale were made on 34 research plots in the course of studies of vegetation changes in beech and spruce stands in the Orlické hor...
Effect of desiccation on the root system of Norway spruce (Picea abies [L.] Karst.) seedlings and a possibility of using hydrogel STOCKOSORB® for its protection
desiccation electrolyte leakage
2015/1/28
The aims of this study were: 1. to determine the effect of dexiccation treatment on the physiological quality of Norway spruce (Picea abies [L.] Karst.) seedlings by measurements of electrolyte leakag...
The effect of spruce stand thinning on biological activity in soil
spruce stand density soil respiration catalase activity
2015/1/28
The effect of thinning of young spruce stands by 500 trees/ha on biological activity in the soil profile was studied in the mountainous area of the Moravian-Silesian Beskids. The biological activity o...
Production potential and ecological stability of mixed forest stands in uplands – V. A mixed spruce/beech stand on a nutrient-rich site of the Křtiny Training Forest Enterprise
mixed stands spruce beech
2015/1/28
The study is already the 5th account on the production potential and stability of mixed forest stands in uplands. A spruce/beech stand established in the mid-30s of the 20thcentury is assessed. The st...
The elasticity of growth in pure and mixed stands of Norway spruce (Picea abies [L.] Karst.) and common beech (Fagus sylvatica L.)
elasticity of growth density-growth-relationship risk spreading
2015/1/28
This study indicates that the growth of mixed stands with Norway spruce (Picea abies [L.] Karst.) and common beech (Fagus sylvatica L.) is more stable across a range of stand densities than it is in p...
Game appreciation in legislative conditions of the Czech Republic
game management game appreciation game losses
2015/1/28
An analysis was made of the present situation concerning game appreciation in the Czech Republic. A study was conducted into effective laws and regulations related to the valuation of nature. There is...
Previous experiences with breeding of lime tree (Tilia cordata Miller) in European countries are shown in this paper. The first results were obtained from the evaluation of juvenile planting of lime t...
Diversification of increment reactions of Douglas fir (Pseudotsuga menziesii Franco) from mountainous regions of southern Poland
Douglas fir dendroclimatology tree ring
2015/1/28
Dendroclimatological research presented in this paper concerns Douglas fir (P. menziesii) at 17 sites located in the area of the Sudetes Mountains, the Polish part of the Carpathians and Roztocze. The...
近3年国家自然科学基金林学学科结题项目SCI论文分析
林学学科 结题项目 SCI论文
2014/1/7
对2010~2012年国家自然科学基金林学学科结题项目发表的SCI论文进行了分析，结果表明，项目完成情况良好，部分研究结果进入国际前沿领域，具有一定的学术影响力，不同项目类型达到了预期的资助目标，优势分支学科是森林生物学和林产化学. 目前林学基础研究具有层次多元化、学科交叉日益加深的特点，但同时存在学科发展不均衡、主要科研机构科研成果有待提高、经典传统林学研究内容萎缩等问题. 研究结果为评估国家自...
为改善木塑复合材料密度大、韧性差的缺陷，采用注塑法制备竹粉/聚丙烯（polypropylene，PP）发泡复合材料；同时为加强木塑材料的生产和质量管理，采用氙灯加速老化方式，研究老化对发泡复合材料力学性能、材色、流变性能的影响，并采用环境扫描电镜（environmental scanning electronic microscopy, ESEM）和傅里叶红外光谱（Fourier transfor...
湖南洞庭湖湿地生态系统国家定位观测研究站，简称洞庭湖湿地站，于2009年经国家林业局批准建设，隶属于湖南省林业科学院，是国家林业局陆地生态系统定位研究网络（CTERN）的重要组成，同时也是湖南林业第一个湿地生态系统定位研究站。
金丝河负离子分布及旅游资源引力分析
引力模型 小分子水 负离子
2014/6/23
本文通过测定金丝河地区的负离子分布，采用城市引力模型从实际数据角度分析了决定辽宁东戴河新区的游客来源因素，同时还介绍了辽宁东戴河新区的整体概况、旅游业目前发展的状态以及旅游业发展的优势和特色。在分析模型数据的基础上,我们进一步提出了辽宁东戴河新区游业发展的建议
Allelopathic potential of Artemisia biennis (biennial wormwood)
Allelopathic Potential Artemisia Biennis Biennial Wormwood
2013/2/28
In this study, Artemisia biennis was seeded in a greenhouse and raised to an average plant height of 100 cm. Aboveground plant portions were harvested and partitioned into leaves and stems, and dried;...
The influence of price on rice production in Sierra Leone
Sierra Leone Food Security Rice Production Econometric Model Specification
2013/2/28
Rice is the main staple food of the vast majority of Sierra Leoneans, eaten on a daily basis by almost every household in the country. Rice is the most important food crop widely grown by farmers acro...