中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 关帝山不同密度云杉林的更新特征 山西农业科学 2019 (8) 1446-1449
Position: Home > Articles > 关帝山不同密度云杉林的更新特征 Journal of Shanxi Agricultural Sciences 2019 (8) 1446-1449

关帝山不同密度云杉林的更新特征

作  者：
陈欣;韩有志
单  位：
山西农业大学林学院
关键词：
云杉林;密度;更新幼树;更新幼苗;格局特征;年龄结构
摘  要：
云杉林是华北地区典型的寒温性常绿针叶林.以关帝山林区的云杉林为研究对象,探讨不同密度林下更新组成、结构及格局特征,了解更新规律.结果表明,云杉林下更新幼树随林冠层密度的增大,单位面积上株数明显减少,针叶树更新幼苗的数量随着林分密度的增大而明显减少;云杉幼苗的年龄结构呈现连续性,3年生以下幼苗比例为87%~98%,5年生以上的更新幼苗占2%,总体上存在年龄结构的缺失现象,缺少幼苗到幼树的过渡阶段;在冠层密度相对小的林分中云杉更新幼苗的空间变异相对大,在冠层密度相对大的林分中更新幼苗的空间变异相对小,更新幼苗主要呈现随机分布格局,分数维很大,更新幼苗空间变异很复杂,在空间上呈现复杂的斑块分布;灌木株数较多的样地针叶树更新幼苗相对较少,灌木株数较少的样地针叶树更新幼苗相对较多,但相关性不显著.
作  者：
CHEN Xin;HAN Youzhi;College of Forestry,Shanxi Agricultural University;
单  位：
CHEN Xin%HAN Youzhi%College of Forestry,Shanxi Agricultural University
关键词：
spruce forest;;densities;;saplings;;seedling;;pattern characteristic;;age structure
摘  要：
Spruce forest is the typical cold temperate evergreen coniferous forest. This paper chose spruce forest with different densities as the research object, studied on their regeneration under canopy, and discussed regeneration composition, age structure and pattern characteristic mainly, as well as the regeneration regularity. The result showed that in Picea spp., the sapling and seedling number per unit area decreased gradually with increasing of canopy density. The age structure of Picea spp. seedling was relatively connected, the proportion of under 3 years-old was 87%-98%, and over 5 years-old was 2%. Furthmore, seedling age structure and height revealed an imperfection phenomenon on the whole, lacked the transitional stage from seedling to sapling. In lowdensity stand, regeneration seedlings had a big spatial variability, and vice versa, seedlings showed randomly distribution pattern and complicated patch shape in scale range.The stand with more shrub had a small amount of coniferous seedling, and vice versa, but the correlation was not significant.

相似文章

导出引用
计量
文章访问数: 9
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46