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养分输入方式对森林生态系统土壤养分循环的影响研究进展

倪惠菁1,苏文会1,范少辉1*,曾宪礼1,金艺1,2   

  1. 1国际竹藤中心, 国家林业局竹藤科学与技术重点实验室, 安徽太平竹林生态定位观测研究站, 北京 100102;2安徽农业大学, 合肥 230000)
  • 出版日期:2019-03-10 发布日期:2019-03-10

Responses of forest soil nutrient cycling to nutrient input modes: A review.

NI Hui-jing1, SU Wen-hui1, FAN Shao-hui1*, ZENG Xian-li1, JIN Yi1,2   

  1. (1International Centre for Bamboo and Rattan, Key Laboratory of Science and Technology of Bamboo and Rattan of State Forestry Administration , Anhui Taiping Bamboo Forest Ecosystem Observation Station, Beijing 100102, China; 2Anhui Agricultural University, Hefei 230000, China).
  • Online:2019-03-10 Published:2019-03-10

摘要: 土壤养分循环对森林生态系统稳定性维持、树种选择及更新、可持续经营具有重要意义,掌握养分输入来源及过程可指导森林生态系统物质循环与能量流动分析及生态功能评估。凋落物、根系周转、根系分泌物是森林土壤养分的主要来源,是土壤养分循环的重要组成部分。本文分析了3种主要养分输入方式及其影响因素,总结了凋落物组成及理化性质、生物因子、环境因子等对凋落物分解及土壤养分循环的影响;综述了细根底物性质、树种组成、土壤生物、环境因子变化对细根周转及土壤养分循环的影响;探讨了根系分泌物对土壤养分循环过程的作用,基于此,提出了该领域亟需深入研究的重要方向,以期为相关研究及森林生态系统养分管理提供参考。

关键词: 林隙, 干扰状况, 藏东南, 冷杉林

Abstract: Soil nutrient cycling is of great significance to the maintenance of forest ecosystem stability, selection and renewal of tree species, and forest sustainable management. Learning the sources and processes of nutrient inputs can facilitate the analysis of matter cycling and energy flow and the evaluation of ecosystem functions. Leaf litter, root turnover, and root exudates are the main sources of nutrients in forest soils and important components of soil nutrient cycling. In this paper, the three major nutrient input processes and their influencing factors were analyzed. The effects of litter composition and physicochemical properties, biotic factors, and environmental factors on litter decomposition and soil nutrient cycling were summarized. The effects of fine root substrate properties, tree species composition, soil biology, and environmental factor changes on fine root turnover and soil nutrient cycling were reviewed. The role of root exudates in the soil nutrient cycling process was explored. Finally, important directions that need urgent research in this filed are proposed to provide reference for related research and nutrient management of forest ecosystems.

Key words: Gap, Disturbance status, Southeast Tibet, Fir forest