Scholarlink

<p>Tree plantations are globally significant, and therefore, growth-related challenges cannot be ignored. Canopy structure and light environment influence the growth of plantations, but the precise relationship remains unclear. We selected seven-year-old poplar plantations of varying cultivars planted various densities and measured their growth, canopy structure, and light environment. The findings indicate that poplar plantations of different cultivars and at different planting densities showed variations in leaf area index (<i>LAI</i>), average leaf angle (<i>ALA</i>), crown length (<i>CL</i>), length ratio (<i>CLR</i>), roundness (<i>CR</i>) and surface area (<i>CSA</i>), which directly or indirectly affect growth, resulting in disparities in their growing conditions. Crown roundness directly impacted growth, while <i>LAI</i>, <i>CLR</i> and <i>ALA</i> influenced growth indirectly by affecting intercellular carbon dioxide concentration. <i>LAI</i> and <i>CLR</i> had a positive effect; <i>ALA</i> had a negative one. Crown length and surface area directly and indirectly influenced growth by affecting photosynthetically active radiation and net photosynthetic rate, with direct impacts being more pronounced. This research has clarified the regulatory role of canopy structure in plantations growth, providing valuable insights for developing more effective management strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimal management for promoting growth of poplar plantations: insights from canopy structure and light environment

  • 期刊论文

  • 发表日期：

    2025年8月20日

查看全文
  • Xiaolong Zhao,
  • Peilin Xie,
  • Yutian Xin,
  • Junfeng Fan,
  • Pan Wan,
  • Huijing Ma

摘要

Tree plantations are globally significant, and therefore, growth-related challenges cannot be ignored. Canopy structure and light environment influence the growth of plantations, but the precise relationship remains unclear. We selected seven-year-old poplar plantations of varying cultivars planted various densities and measured their growth, canopy structure, and light environment. The findings indicate that poplar plantations of different cultivars and at different planting densities showed variations in leaf area index (LAI), average leaf angle (ALA), crown length (CL), length ratio (CLR), roundness (CR) and surface area (CSA), which directly or indirectly affect growth, resulting in disparities in their growing conditions. Crown roundness directly impacted growth, while LAI, CLR and ALA influenced growth indirectly by affecting intercellular carbon dioxide concentration. LAI and CLR had a positive effect; ALA had a negative one. Crown length and surface area directly and indirectly influenced growth by affecting photosynthetically active radiation and net photosynthetic rate, with direct impacts being more pronounced. This research has clarified the regulatory role of canopy structure in plantations growth, providing valuable insights for developing more effective management strategies.