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Scientia Silvae Sinicae ›› 2017, Vol. 53 ›› Issue (5): 156-163.doi: 10.11707/j.1001-7488.20170518

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Effect of Management Practices on Methane Uptake in Forest Soils

Wang Huilai, Liu Juan, Jiang Peikun, Zhou Guomo, Li Yongfu, Wu Jiasen   

  1. State Key Laboratory of Subtropical Silviculture Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Zhejiang A & F University Lin’An 311300
  • Received:2015-11-18 Revised:2017-01-19 Online:2017-05-25 Published:2017-06-22

Abstract:

Forest soils are the main sinks of atmospheric CH4. This study is aimed to provide a basis for forest management practices under climate change. The databases of Scopus, Web of Science, SDOS and China National Knowledge Infrastructure (CNKI) were used to review current status of studies on CH4 uptake from forest soils. The review highlighted the effect of forest management practices (fertilization, cutting, burning, and understory management) on soil CH4 uptake, and explained its main mechanism. Fertilization tended to inhibit soil CH4 uptake in N-rich forest soils, but obviously promoted soil CH4 uptake in N-poor forest soils. It was generally believed that slash burning reduced soil CH4 uptake. Clear-cutting changed soil temperature, water content, decomposition of organic carbon, and thus weakened the capability of methanotrophs to oxidize methane. Selective-cutting could stimulate, suppress, or show no effect on forest soil CH4 uptake. Understory removal increased soil temperature, sped up evaporation of soil water and increased the activity of methanotrophs, which promoted soil CH4 uptake. Nitrogen fixing plants reduced soil CH4 uptake. There were significant differences of management practices on forest soil CH4uptake among the previous studies. Additionally, the inherent mechanism is still not sufficient. With the development of research theory and technology, the interactive effects of various factors and climate change on forest soil CH4 uptake and its mechanism, the response model of methanotrophs to various interference factors will become the main direction in the future.

Key words: human disturbance, soil CH4 uptake, management practices, fertilization, cutting, burning, understory management

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