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Comparative study on the observation of atmospheric nitrogen deposition in a forestland |
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Abstract Comparative study on atmospheric nitrogen deposition was conducted using throughfall method and micrometeorological inferential method with study object of broadleaf forest (Quercus chenii) at Forest Micrometeorological Experiment Sub-Station, Experiment Station of Red Soil Ecology, Chinese Academy of Sciences. The results observed by throughfall method from Oct. 2006 to Sep. 2007 showed that NH4+–N and NO3?–N dry deposition were 37.7 and 18.5kgN/(hm2?a), respectively, in which NH4+–N were the predominant contributors, accounting for 67.0% of total dry deposition. These results were in agreement with those obtained by micrometeorological inferential method, indicating that throughfall method was reliable in the estimation of nitrogen dry deposition under forestland. Results obtained from these two methods confirmed that excessive N deposition fluxes occurred in the study area, and that their effects on various ecosystems should be paid more attention.
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Received: 06 September 2012
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