PICEA相关论文
对种群年龄结构的研究表明，虽经人为频繁干扰，管涔山青扦天然林仍表现出异龄林结构特征，立木年龄范围超过一个龄级期，根据年龄结构特征......
Birch(Betula)trees and forests are widely distributed across much of the temperate and boreal zones of the Northern Hemi......
205 surface pollen samples from different communities in Northern China were analyzed to understand the quantitative rel......
根据Hutchinson的n维超体积概念以及物种与资源利用之间的关系,构建了青海云杉(Picea crassifolia)在三维环境资源空间中的生物-地......
内蒙沙地白杆(Picea meyeri)林是一个非常特殊的森林生态系统类型,这在国内外均属罕见,是我国珍贵的自然财富。近年来,已引起学术......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Fluctuation of Picea timber line and paleo-environment on the northern slope of Tianshan Mountains d
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
