南京林业大学学报（自然科学版）2024，Vol.48Issue(6)：145-156,12.DOI:10.12302/j.issn.1000－2006.202305007
阔叶红松林下幼苗、幼树定植生境散射辐射特征
Diffuse radiation environment of regeneration seedlings and saplings under a broadleaved-Korean pine forest
摘要
Abstract
[Objective]This study aims to determine the light intensity requirements for the regeneration of seedlings and saplings in mixed broadleaved-Korean pine(Pinus koraiensis)forests.Additionally,it seeks to investigate how the regeneration of different tree species responds to variations in light intensity.This research guides the scientific management and conservation efforts of broadleaved-Korean pine forests and their ecosystems.[Method]The research focused on nine common tree species:Pinus koraiensis,Picea koraiensis,Abies nephrolepis,Ulmus davidiana,Acer pictum,Acer tegmentosum,Acer ukurunduense,Tilia amurensis,and Fraxinus mandshurica,across four plots in the Liangshui National Nature Reserve.The weighted inside-boundary neighbor diffuse shading degree(WINDSD)was computed for the planting habitats of each seedling and sapling.The mean,standard deviation,and distribution tendency degree of WINDSD were calculated for the planting habitats of each tree species'seedlings and saplings.The Mann-Whitney U test was employed to identify significant differences in WINDSD among the planting habitats of each tree species and uniformly distribute sample points beneath the broadleaved-Korean pine forest canopy.The analysis is extended to compare the differences in WINDSD among the planting habitats of seedlings and saplings for each tree species.Additionally,the Monte Carlo method was utilized to ascertain significant differences in the distribution tendency degree of WINDSD between the planting habitats of seedlings and saplings for various tree species populations and a random distribution population of equivalent size for each tree species.[Result]The analysis revealed that the mean and standard deviation of WINDSD for the uniformly distributed sample points of the broadleaved-Korean pine forest were 0.538 and 0.213,respectively,with a distribution tendency degree of 1.069.Among the seedlings and saplings of the nine tree species studied,only Ulmus japonica and Fraxinus mandshurica saplings exhibited a lower average value and distribution tendency degree of WINDSD compared to the uniformly distributed sample points in the forest.The analysis also indicated that the diffuse radiation intensity within the saplings'planting habitats for Pinus koraiensis,Picea koraiensis,Abies nephrolepis,and Tilia davidiana was weaker compared to those designated for seedling regeneration.The Monte Carlo and Mann-Whitney U tests highlighted that the WINDSD in the planting habitats of seedlings for Pinus koraiensis,Picea koraiensis,Abies nephrolepis,Ulmus davidiana,Acer pictum,Acer tegmentosum,and Fraxinus mandshurica was significantly higher than that of the uniformly distributed sample points.In contrast,the WINDSD values for the planting habitats of Acer ukurunduense and Tilia amurensis seedlings did not significantly differ from those of the uniformly distributed sample points in the forest.For saplings,the WINDSD values in the planting habitats of Pinus koraiensis,Picea koraiensis,and Abies nephrolepis were significantly higher compared to the uniformly distributed sample points,whereas those for the saplings of other species did not significantly differ.Additionally,the Mann-Whitney U test indicated significant differences in WINDSD between the planting habitats of saplings and seedlings for Ulmus japonica and Acer mono(P＜0.05).[Conclusion]The findings suggest that seedlings and saplings of the primary tree species in the broadleaved-Korean pine forest are usually found in areas with weaker light on the forest floor.Compared to seedlings,saplings tend to establish in habitats with slightly stronger light intensity.Different tree species exhibit varied responses to light intensity variations under the forest canopy.The differences in light intensity between habitats for seedlings and saplings are not pronounced for Pinus koraiensis,Picea koraiensis,and Abies nephrolepis,whereas the light intensity in the sapling habitats of Ulmus davidiana,Acer pictum,and Acer tegmentosum is significantly higher than in their seedling regeneration areas.关键词
阔叶红松林/森林天然更新/光照强度/加权进界邻体散射荫蔽度/蒙特卡罗检验Key words
broadleaved-Korean pine forest/natural forest regeneration/light intensity/weighted inside-boundary neighbor diffuse shading degree(WINDSD)/Monte Carlo test分类
农业科技引用本文复制引用
杜昕,董雪,谷会岩,陈祥伟..阔叶红松林下幼苗、幼树定植生境散射辐射特征[J].南京林业大学学报（自然科学版）,2024,48(6):145-156,12.基金项目
科技基础资源调查专项(2021FY100702) （2021FY100702）
林业公益性行业科研专项(201404303). （201404303）
