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El efecto del cambio de uso de la tierra en el suelo radiocarbono
Science (New York, N.Y.)
|October 29, 1993
Resumen
Los presupuestos de carbono de la biosfera terrestre se basan en suelos que actúan como sumideros de carbono. Sin embargo, el humus del suelo agrícola ha disminuido, lo que indica un "marrón" de estas tierras, afectando particularmente al carbono de ciclo rápido.
Área de la Ciencia:
- Ciencias del suelo Ciencias del suelo.
- Biogeoquímica La biogeoquímica es la bioquímica.
- Investigación del ciclo del carbono.
Sus antecedentes:
- Los ecosistemas terrestres son cruciales para mitigar el exceso de dióxido de carbono atmosférico (CO2).
- La materia orgánica del suelo se considera una importante reserva de carbono.
- Las prácticas agrícolas pueden tener un impacto negativo en el almacenamiento de carbono en el suelo.
Objetivo del estudio:
- Para investigar el impacto del cultivo en el suelo agrícola. carbono.
- Para evaluar si el humus del suelo ha disminuido debido a la agricultura.
- Para determinar la forma de carbono perdido de los suelos agrícolas.
Principales métodos:
- Se aplicaron técnicas de datación por radiocarbono a muestras de suelos agrícolas.
- El análisis se centró en la composición y las tasas de ciclo de la materia orgánica del suelo.
Principales resultados:
- Las mediciones de radiocarbono confirman una reducción en el humus del suelo en las tierras agrícolas.
- Esta disminución observada apoya el concepto de un "bronceado" de las tierras agrícolas.
- La pérdida de carbono afecta principalmente a la fracción de ciclo rápido del humus del suelo.
Conclusiones:
- Las prácticas de cultivo parecen reducir la capacidad de almacenamiento de carbono de los suelos agrícolas.
- La pérdida de humus de ciclo rápido tiene implicaciones para los presupuestos de carbono del suelo.
- Se necesita más investigación para comprender y mitigar la pérdida de carbono de los suelos agrícolas.
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