Resumen
El árbol Ochroma pyramidale se utiliza para recuperar áreas de selva que fueron cultivadas, ya que genera una gruesa capa de hojarasca que persiste por varios años. Los objetivos de este estudio fueron: 1) conocer cuánta hojarasca produce esta especie, 2) estimar cuánto tiempo persiste en el suelo e 3) identificar cuál es el papel de la fauna del suelo en su descomposición. Se estimó la producción de hojarasca en 11 Mg/ha/año; la medición de biomasa y profundidad de la capa de hojarasca en sitios previamente plantados con Ochroma mostró una disminución de 60% en 13 años. En el experimento de descomposición de la hojarasca se perdió el 37% de su biomasa en 180 días. La fauna del suelo disminuyó la concentración de celulosa, mientras la lignina disminuyó debido al tiempo de permanencia de la hojarasca en el suelo. La alta proporción C:N de las hojas y su elevada concentración de lignina explican la baja pérdida de biomasa y su acumulación.
Citas
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