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    Impacts of enhanced nitrogen deposition and soil acidification on biomass production and nitrogen leaching in Chinese fir plantations

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    Fecha
    2012
    Autor
    Blanco Vaca, Juan Antonio Upna
    Wei, Xiaohua 
    Jiang, Hong 
    Jie, Cheng-Yue 
    Xin, Zan-Hong 
    Versión
    Acceso abierto / Sarbide irekia
    xmlui.dri2xhtml.METS-1.0.item-type
    Artículo / Artikulua
    Versión
    Versión aceptada / Onetsi den bertsioa
    Impacto
     
     
     
    10.1139/x2012-004
     
     
     
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    Resumen
    Atmospheric pollution levels in China are increasing quickly. Experience from other polluted regions shows that tree growth could be affected, but long-term effects of N deposition and soil acidification on Chinese forests remain mostly unknown. Soil acidification and N deposition were simulated for Chinese fir plantations in Southeast China. A factorial experiment combined four levels of rain pH ... [++]
    Atmospheric pollution levels in China are increasing quickly. Experience from other polluted regions shows that tree growth could be affected, but long-term effects of N deposition and soil acidification on Chinese forests remain mostly unknown. Soil acidification and N deposition were simulated for Chinese fir plantations in Southeast China. A factorial experiment combined four levels of rain pHs (2.5, 4.0, 5.6 and 7.0), four N deposition rates (1, 7.5, 15 and 30 kg N ha-1 y-1) and two site qualities (poor and rich sites), managed for 3 consecutive 20-year rotations. Results indicate atmospheric pollution effects are not immediate, but after 1 to 2 rotations soil acidification effects could reduce ecosystem C pools significantly (-25% and -11% in poor and rich sites, respectively). N deposition rates above 15 kg N ha-1 y-1 could offset some of the negative effects of soil acidification and led to more ecosystem C (19 and 28 Mg C ha-1 more in poor and rich sites than in low N deposition). However, at high N deposition rates (>15 kg N ha-1 y-1), N leaching losses could greatly increase, reaching 75 kg N ha-1 y-1. Moderate N deposition could increase tree biomass production and soil organic mass, resulting in increased ecosystem C, but these gains could be associated to important N leaching. Atmospheric pollution could also result in the long-term in nutrient imbalances and additional ecological issues (i.e. biodiversity loss, eutrophication, etc.) not studied here. [--]
    Materias
    N deposition, Cunninghamia lanceolata, FORECAST model, Sustainable forest management, Atmospheric pollution, C sequestration
     
    Editor
    NRC Research Press
    Publicado en
    Canadian Journal of Forest Research, 2012, 42(3): 437-450
    Notas
    Incluye material complementario
    Departamento
    Universidad Pública de Navarra. Departamento de Ciencias del Medio Natural / Nafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Saila
     
    Versión del editor
    https://dx.doi.org/10.1139/x2012-004
    URI
    https://hdl.handle.net/2454/19823
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    • Artículos de revista DCMN - NIZS Aldizkari artikuluak [69]
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