森林生态系统中磷循环的研究进展 -林学专业

摘要

磷是森林生态系统中重要的限制性元素，其循环过程对维持森林生态系统的结构和功能具有关键意义。本研究旨在系统梳理近年来关于森林生态系统中磷循环的研究进展，通过文献综述与野外调查相结合的方法，探讨磷在森林生态系统中的输入、输出及内部循环机制。研究表明，大气沉降和母质风化是磷的主要输入途径，而淋溶作用和生物吸收则是磷输出的重要方式；植物根系分泌物可促进难溶性磷的溶解，提高磷的有效性；微生物群落在磷转化过程中发挥着不可替代的作用。创新点在于首次将磷循环与全球变化因素（如气候变化、氮沉降增加）相联系，揭示了全球变化背景下森林生态系统磷循环的新特征，为深入理解森林生态系统养分动态提供了新的视角，也为森林经营管理提供了理论依据。

关键词：磷循环; 森林生态系统; 全球变化

Abstract

Phosphorus is a critical limiting element in forest ecosystems, and its cycling process plays a key role in maintaining the structure and function of these ecosystems. This study aims to systematically review recent advances in phosphorus cycling within forest ecosystems by integrating literature reviews with field investigations. The research reveals that atmospheric deposition and parent material weathering are the primary pathways for phosphorus input, while leaching and biological uptake serve as important mechanisms for phosphorus output. Plant root exudates enhance the solubilization of insoluble phosphorus, thereby increasing its availability. Microbial communities play an indispensable role in phosphorus transformation processes. A novel contribution of this study lies in linking phosphorus cycling with global change factors such as climate change and increased nitrogen deposition, uncovering new characteristics of phosphorus cycling in forest ecosystems under global change scenarios. This provides a fresh perspective for understanding nutrient dynamics in forest ecosystems and offers theoretical support for forest management and conservation practices.

Key words:Phosphorus Cycle; Forest Ecosystem; Global Change

中文摘要 I

英文摘要 II

引言 1

第1章、森林磷循环的基本概念 3

1.1、磷在森林生态系统中的作用 3

1.2、森林磷循环的主要过程 3

1.3、影响磷循环的关键因素 4

第2章、磷循环的生物地球化学机制 5

2.1、微生物对磷循环的影响 5

2.2、植物根系与磷吸收 5

2.3、土壤矿物与磷固定 6