Research press release


Nature Geoscience

Nitrogen cuts soil carbon release



I Janssensらは、窒素付加実験の解析と野外の研究を実施し、温帯森林土壌における土壌炭素の交代に対する窒素堆積物の影響を決定した。彼らは、窒素堆積物は土壌中の有機物の分解を遅くし、土壌への炭素の蓄積を増大させることを見つけた。その結果として、土壌からの二酸化炭素の放出はかなり減少する。


Nitrogen deposition reduces the amount of carbon dioxide emitted from temperate forest soils, according to a review published online this week in Nature Geoscience.

Fossil fuel and fertilizer use has increased the amount of nitrogen in the atmosphere over the past century, leading to increased levels of nitrogen in soils.

Ivan Janssens and colleagues carried out an analysis of nitrogen addition experiments and field studies to determine the impact of nitrogen deposition on soil carbon turnover in temperate forest soils. They find that nitrogen deposition slows the breakdown of soil organic matter, and increases soil carbon storage. As a result, carbon dioxide emissions from soil are substantially reduced.

The researchers warn that the future increase in nitrogen deposition expected in the tropics could have unforeseen consequences for carbon cycling in tropical forest soils.

doi: 10.1038/ngeo844


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