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Mejora de la deposición de nitrógeno sobre China.

Xuejun Liu1, Ying Zhang, Wenxuan Han

  • 1College of Resources & Environmental Sciences, China Agricultural University, Beijing 100193, China.

Nature
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China China China China también.

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Área de la Ciencia:

  • Ciencias del medio ambiente Ciencias del medio ambiente.
  • Química de la atmósfera química de la atmósfera
  • Ecología Ecología Ecología.

Sus antecedentes:

  • China se enfrenta a una grave contaminación del aire por las emisiones de nitrógeno reactivo.
  • La deposición de nitrógeno impacta los ecosistemas, la salud humana y el clima.
  • Los datos sobre la deposición de nitrógeno en China son escasos.

Objetivo del estudio:

  • Evaluar la dinámica de la deposición de nitrógeno y los impactos del ecosistema en China de 1980 a 2010.
  • Para analizar las tendencias en la deposición de nitrógeno a granel y sus formas.
  • Evaluar los efectos de la deposición de nitrógeno en la absorción de nitrógeno de las plantas y cultivos.

Principales métodos:

  • Se utilizaron conjuntos de datos nacionales sobre la deposición masiva de nitrógeno.
  • Se analizaron las concentraciones de nitrógeno foliar vegetal.
  • Absorción de nitrógeno de cultivos examinados de suelos no fertilizados.

Principales resultados:

  • El promedio anual de deposición de nitrógeno a granel aumentó significativamente de 13.2 a 21.1 kg N/ha entre los años 1980 y 2000.
  • Las tasas de deposición de nitrógeno en las regiones industriales y agrícolas coinciden con los niveles máximos observados en Europa antes de la mitigación.
  • Se observó un aumento de la absorción de nitrógeno foliar de las plantas y de nitrógeno de los cultivos, lo que indica impactos en el ecosistema.

Conclusiones:

  • Las emisiones y depósitos de nitrógeno de China plantean importantes desafíos ambientales y de salud.
  • La reducción de las emisiones de nitrógeno reactivo es crucial para mitigar los impactos negativos.
  • El monitoreo continuo y las estrategias de control de emisiones son necesarios.