西北林学院学报2024，Vol.39Issue(3)：35-41,7.DOI:10.3969/j.issn.1001-7461.2024.03.05
华北典型针叶混交林林下更新影响因素分析
Influencing Factors of Understory Renewal in Typical Coniferous Mixed Forests in Northern China
摘要
Abstract
Natural regeneration plays an important role in maintaining forest stability and forest community dynamics,and exploring its related influencing factors can provide scientific basis for promoting understory regeneration in the study area.In this paper,the mixed forest of Larix principis-rupprechtii,and Picea spp.(P.wilsonii,and P.meyeri)occurring in the Pangquangou Nature Reserve was selected as the re-search object.Key factors affecting the understory renewal of the forest were analyzed from two aspects:stand structure and site conditions based on the gray correlation method.The results showed that 1)in the mixed forest of L.principis-rupprechtii and Picea spp.,351 seedlings and 172 saplings of Picea spp.were found per hectare,and only 39 seedlings and 36 saplings of L.principis-rupprechtii per hectare were found,indicating the strong renewal ability of Picea spp.2)The relational degrees of the factors influen-cing the natural renewal of the mixed forest were in the order of composition of the tree species＞elevation＞size ratio＞angle scale＞stand density＞forest age＞attenuation＞canopy density＞mixed angle＞slope.On the whole,natural regeneration had a significant response to stand structure and site factors,among them,tree species composition was the most important stand non-spatial structural factor affecting natural regeneration,altitude was the most important standing factor affecting natural regeneration,and size ratio and angular scale were the main stand spatial structural factors affecting natural regeneration.In the future stand adjustment,the renewal of L.principis-rupprechtii and Picea spp.mixed forest can be promoted by optimizing stand structure,so as to increase the stand stability.关键词
天然更新/林分稳定性/立地条件/林分结构/灰色关联度Key words
natural regeneration/forest ecosystem stability/site factor/stand structure/grey relational de-gree分类
农业科技引用本文复制引用
张泽鑫,蔡有柱,赵丽娟,左亚凡,程唱,贺康宁..华北典型针叶混交林林下更新影响因素分析[J].西北林学院学报,2024,39(3):35-41,7.基金项目
青海省重点研发与转化计划(2022-SF-160). （2022-SF-160）
