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

作　　者：杜昕 董雪 谷会岩[1,2] 陈祥伟 DU Xin;DONG Xue;GU Huiyan;CHEN Xiangwei(Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education,Key Laboratory of National Forestry and Grassland Administration on Northeastern Forest Silviculture,College of Forestry,Northeast Forestry University,Harbin 150040,China;Liangshui National Key Field Observation and Research Station for Forest Ecosystem,Yichun 153000,China)

机构地区：[1]森林生态系统可持续经营教育部重点实验室,东北森林资源培育国家林业和草原局重点实验室,东北林业大学林学院,黑龙江哈尔滨150040 [2]黑龙江凉水森林生态系统国家野外科学观测研究站,黑龙江伊春153000

出　　处：《南京林业大学学报(自然科学版)》2024年第6期145-156,共12页Journal of Nanjing Forestry University:Natural Sciences Edition

基　　金：科技基础资源调查专项(2021FY100702);林业公益性行业科研专项(201404303)

摘　　要：【目的】为探明阔叶红松林下常见乔木树种更新幼苗、幼树的光强需求,分析了各树种更新对林下光强的响应差异,进而为阔叶红松林及相关生态系统的科学经营提供支持。【方法】以凉水国家级自然保护区内4块阔叶红松林调查样地林下红松(Pinus koraiensis)、红皮云杉(Picea koraiensis)、臭冷杉(Abies nephrolepis)、春榆(Ulmus davidiana)、色木槭(Acer pictum)、青楷槭(Acer tegmentosum)、花楷槭(Acer ukurunduense)、紫椴(Tilia amurensis)、水曲柳(Fraxinus mandshurica)9种常见乔木更新的幼苗、幼树为研究对象,在个体水平上计算各株更新幼苗、幼树定植生境的加权进界邻体散射荫蔽度(WINDSD),计算各树种幼苗、幼树定植生境的WINDSD平均值、标准差及分布倾向度。以Mann-Whitney U检验分析各树种幼树、幼苗定植生境的WINDSD与阔叶红松林下均匀布设样点间的差异显著性及同种树种幼苗与幼树定植生境WINDSD间的差异显著性;同时,以蒙特卡罗法检验各类乔木更新幼苗、幼树种群定植生境与阔叶红松林下同等规模的随机分布种群定植生境的WINDSD分布倾向度间的差异显著性。【结果】阔叶红松林下均匀布设样点的WINDSD均值与标准差分别为0.538及0.213,分布倾向度为1.069。红松、红皮云杉、臭冷杉、春榆、色木槭、青楷槭、花楷槭、紫椴、水曲柳9种乔木树种的更新幼树、幼苗中,仅有春榆幼树及水曲柳幼树定植生境的WINDSD平均值与分布倾向度小于林下均匀布设样点。基于均值与分布倾向度共同判断,红松、红皮云杉、臭冷杉及紫椴更新幼树定植生境中的散射辐射强度弱于更新幼苗定植生境;春榆、色木槭、青楷槭、花楷槭、水曲柳更新幼树定植生境的散射辐射强度强于更新幼苗定植生境。蒙特卡罗检验与Mann-Whitney U检验共同显示,红松、红皮云杉、臭冷杉、春榆、色木槭、青楷槭、水曲柳更新幼�【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

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 

分 类 号：S711[农业科学—林学] S754