常绿阔叶林林冠环境对栲幼苗建成的影响

吴小琪,杨圣贺,黄力,李笑寒,杨超,钱深华,杨永川

Effects of forest canopy condition on the establishment of Castanopsis fargesii seedlings in a subtropical evergreen broad-leaved forest

Xiao-Qi WU,Sheng-He YANG,Li HUANG,Xiao-Han LI,Chao YANG,Shen-Hua QIAN,Yong-Chuan YANG

表1 林窗和林下播种样方基本信息

Table 1 Basic characteristics of sowing plots in forest gaps and understory

林冠环境 Canopy condition 面积 Area (m2) 形成方式 Types of formation 年龄/年 Age (year) 主要边界木 Main boundary trees 光通量 Quantum flux (μmmol·m-2·s-1) 物种 Species 胸径 DBH (cm) 树高 H (m) 大林窗 Large-sized gap A 175 人工砍伐栲 Selective cutting of Castanopsis fargesii 2 栲 C. fargesii 20-45 15-25 484 ± 48.4a 山矾 Symplocos sumunti 10-20 10-20 B 185 栲倒木 C. fargesii logs 3-5 栲 C. fargesii 30-40 15-20 513 ± 30.9a 润楠 Machilus nanmu 20-35 15-25 C 190 栲倒木 C. fargesii logs 6-8 栲 C. fargesii 25-50 17-20 697 ± 104.3a 润楠 M. nanmu 20-35 10-20 中林窗 Medium-sized gap A 122 栲倒木 C. fargesii logs 5-7 润楠 M. nanmu 20-30 15-25 365 ± 24.4b 山矾 S. sumuntia 10-20 10-20 短刺米槠 Castanopsis carlesii var. spinulosa 15-30 10-15 B 140 栲倒木 C. fargesii logs 5-7 润楠 M. nanmu 15-30 15-25 447 ± 36.5b C 131 栲倒木 C. fargesii logs 5-7 栲 C. fargesii 35-45 15-20 444 ± 53.9b 润楠 M. nanmu 10-20 15-20 山矾 S. sumuntia 10-20 10-20 小林窗 Small-sized gap A 88 栲倒木 C. fargesii logs 5-7 栲 C. fargesii 35-55 20-25 169 ± 30.7c 润楠 M. nanmu 25-35 20-25 B 72 栲倒木 C. fargesii logs 4-6 栲 C. fargesii 40-50 20-25 191 ± 13.3c 润楠 M. nanmu 20-30 15-25 C 75 栲倒木 C. fargesii logs 5-7 栲 C. fargesii 25-40 15-20 199 ± 9.3c 润楠 M. nanmu 10-20 15-20 主要优势种 Main dominant species 物种 Species 胸径 DBH (cm) 树高 H (m) 林下 Understory A 100 - - 栲 C. fargesii 35-55 20-25 40 ± 4.1d 润楠 M. nanmu 35-45 20-25 B 100 - - 栲 C. fargesii 40-50 20-25 35 ± 3.4d C 100 - - 栲 C. fargesii 35-45 20-25 39 ± 3.9d 冬桃 Elaeocarpus duclouxii 20-35 15-25