火烧木管理对寒温带森林火灾后冻土释放二氧化碳的影响研究

大兴安岭是我国森林火灾最为严重林区之一，森林火灾的频繁发生成为破坏冻土环境的一种特殊因素，加剧了封存在多年冻土中的二氧化碳（CO2）的释放。本项目在已完成国家自然基金项目基础上，继续以国家级生态站作为研究平台，以实验生态学的方法为主要手段，采用定位观测技术，以野外观测为主、结合室内测定，监测森林火灾后不同火烧木管理方式下冻土释放CO2通量的特征及随时间的变化规律；寻找不同火烧木管理方式下火烧迹地冻土释放CO2通量的驱动力；揭示森林、冻土环境、火灾、CO2之间的相互影响关系；揭示火烧木管理与CO2排放之间的关系。希望从保护大兴安岭多年冻土碳库的角度上给出禁止火烧木采伐的数据依据。呼吁继续关注寒温带大兴安岭林区林火加剧冻土排放CO2的问题，保护好大兴安岭这一重要生态屏障。

As the most serious forest fire region in China, frequent forest fire in Great Xing’an Mountain has become a special fact to destroy the permafrost environment, which intensified the CO2 release from permafrost. On the base of finished Natural Science Foundation of China, this project continue taking the national ecology station as research platform, using the experimental ecology method as main means, combining observation and experiment, this project will monitor the characteristic of CO2 efflux and temporal dynamic in different fire wood managements after forest fire, search the driving force of permafrost CO2 efflux in different fire wood managements, reveal the relation among the forests, permafrost, forest fire, CO2, meanwhile, reveal the relationship between fire wood management, revegetation and CO2 efflux. We hope this project will provide the data basis to prevent fire wood cutting in order to protect the permafrost carbon pool in Great Xing’an Mountain. This project will remind people to pay more attention to the CO2 efflux after forest fire in Great Xing’an Mountain in cold temperate zone, and protect Great Xing’an Mountain as ecological protective screen.