林木叶片养分重吸收影响因素

Exploration of Factors Influencing Nutrient Reabsorption in Forest Leaves

林木叶片的养分重吸收是指林木从衰老的叶片中回收部分养分并转运到发育的成熟叶片或其他器官组织中的过程。林木叶片养分重吸收对植物的养分循环至关重要,能够反映出林木的养分利用效率,并能使林木适应季节与环境的变化,是林木重要的养分保存策略。林木对养分的利用和保存策略,是进行森林经营的关键要素。森林经营与森林培育有着重要的交叉性和关联性。研究林木叶片养分重吸收的影响因素,有助于揭示林木对季节和环境适应策略,解决针对不同林木种类、生长阶段、生境及气候,以何种培育方式和手段为重点的问题,并能为针对化的森林经营策略提供规划依据。因此,本文从不同生长阶段、生长环境、养分添加、叶片功能性状和生态化学计量比对林木养分重吸收的影响这五个方面进行综合概述,并对未来林木叶片养分重吸收影响因素体系建立进行展望,以期为林木的精细化培育与林业精准化经营提供理论基础。

Nutrient resorption(NR)in forest leaves refers to the process by which forests resorb some nutrients from senescent leaves and transfer them to mature leaves or other organs and tissues.Crucial to the nutrient cycling of forests,nutrient resorption in forest leaves can reflect the nutrient utilization efficiency of forests,thus enabling them to adapt to seasonal and environmental changes,so it is an important nutrient conservation strategy for forests.The utilization and preservation strategies of nutrients by trees are key to forest management.There is an important intersection and correlation between forest management and forest cultivation.Studying the influencing factors of nutrient resorption in forest leaves can help reveal forests’adaptation strategies to seasons and environments,and solve the problem of which cultivation methods and tools should be the focus for different forest types,growth stages,habitats and climates.And it can provide planning basis for targeted forest management strategies.Therefore,this paper comprehensively summarized the effects of different growth stages,growth environment,nutrient addition,leaf functional traits and ecological stoichiometric ratio on nutrient resorption of forest trees,and prospected the establishment of influencing factors system of nutrient resorption of forest leaves in the future,in order to provide theoretical basis for fine cultivation of forest trees and precise management of forestry.