凋落物分解模型研究进展

Research progress of litter decomposition model in forest ecosystem

森林凋落物分解模型的研究经历了一个由简单到复杂的过程,从最初的对凋落物失重率的简单描述到广为人知的单指数分解模型,随着对凋落物分解研究的深入,双指数模型、三指数模型也应运而生。国外大部分的研究都集中于欧洲温带森林、北方森林。国内的研究也正在经历一个应用、改进和开发的过程,目前还主要处在应用和改进的阶段。为了准确预测森林生态系统尤其是在全球气候变化背景下C等元素的动态,急需建立适合于我国各类森林生态系统凋落物分解模型。本文回顾了各个历史时期出现的重要模型并进行了简单的分类和评述。

Studies on forest litter decomposition model have experienced a progressive process from simple to sophisticated. Starting from straightforward description of litter mass loss rate to well-known single exponential model, and double exponential, triple exponential model were worked out in succession to fit litter decomposition process. Oversea researches on litter decomposition model were mainly concentrated on European temperate forest and boreal forest. However, domestic researches are still on the stage of application of foreign models. In order to precisely predict carbon dynamics in forest ecosystem, especially under the background of global change, it is imminent to work out litter decomposition models for various kinds of forest ecosystems in China. The paper reviews the major models in the history, sorts and comments them concisely.