亚热带农业研究2025，Vol.21Issue(1)：11-19,9.DOI:10.13321/j.cnki.subtrop.agric.res.2025.01.002
造林密度对杉木幼林林下植被种群种间关联的影响
Effects of different planting densities on interspecific associations of understory plant populations in young Cunninghamia lanceolata plantations
摘要
Abstract
[Purpose]This study aims to explore the effects of varying planting densities on the interspecific associations of under-story plant populations in the young plantations of Cunninghamia lanceolata,thus providing a basis for the management of these young plantations.[Method]The 7-year-old Cunninghamia lanceolata plantations with three planting densities(833,2 500,and 6 667 plants·hm-2)were studied.The overall associations of dominant species in the herb and shrub layers were assessed by the variance ratio method.The autocorrelation coefficient(AC)and the Spearman rank correlation coefficient were calculated to assess the interspecific associations in the herb and shrub layers.Additionally,the M.Godron stability measure was employed to analyze the community stability.[Result]The herb and shrub layers in the young Cunninghamia lanceolata plantations with different planting densities harbored 42 and 36 species,respectively.The analysis of variance indicated that the dominant species in both the herb and shrub layers of the stand with the density of 2 500 plants·hm-2 exhibited a positive association overall.Furthermore,the analysis of the AC and Spearman rank correlation coefficient revealed that the stand with the density of 2 500 plants·hm-2 had the highest number of positive associations of dominant species,with the strongest interspecific associations.The M.Godron stability analysis demonstrated that at a planting density of 2 500 plants·hm-2,the understory vegetation community presented relatively good stability.[Conclusion]Under three afforestation densities,the correlation between the dominant species in the herbaceous layer and the shrub layer of the 2 500 plants·hm-2 young plantations of Cunninghamia lanceolata stand was the strongest,and the understory vegetation community was relatively stable.关键词
造林密度/杉木幼林/林下植被/优势种/种间关联/群落稳定性Key words
planting density/young plantation of Cunninghamia lanceolata/understory vegetation/dominant species/interspecific association/community stability分类
林学引用本文复制引用
冉晋铧,黄樱,熊雨忠,林开敏,曹光球..造林密度对杉木幼林林下植被种群种间关联的影响[J].亚热带农业研究,2025,21(1):11-19,9.基金项目
"十三五"国家重点研发计划项目"杉木高效培育技术研究"(2016YFD0600301). （2016YFD0600301）
