Respuesta temporal al ambiente lumínico y la sequía inducida en el regenerado de una masa mixta en el entorno mediterráneo

Autores/as

  • Marta Pardos Mínguez INIA-CIFOR
  • Guillermo Madrigal INIA-CIFOR
  • Javier de Dios García INIA-CIFOR
  • Javier Gordo Servicio Territorial de Medio Ambiente de Valladolid
  • Rafael Calama INIA-CIFOR

DOI:

https://doi.org/10.31167/csecfv0i45.19876

Resumen

El trabajo se desarrolla en las masas mixtas de pino piñonero, sabina y encina de los páramos calizos de la Meseta Norte. Se estudia la supervivencia, crecimiento, respuesta fisiológica y reparto de biomasa de una plantación de las tres especies a lo largo de un gradiente lumínico y bajo condiciones de sequía inducida. Se establecieron 12 parcelas (45 m2), divididas en dos subparcelas, a su vez con 4 bloques, donde se plantaron 9 plantas (3 plantas por especie). Se fijaron 3 niveles de luz (HL: GSF~0.75: ML: GSF~0.45; LL: GSF~ 0.26); y dos niveles de disponibilidad hídrica (Co: condiciones ambientales naturales; y W-: reducción de precipitación del 30% mediante sistema de exclusión de precipitación). El ensayo duró desde diciembre 2011 hasta mayo 2015. Se evaluó la supervivencia en 19 ocasiones y se midió la fluorescencia a la clorofila 4 veces. En mayo 2015 se hizo cosecha final,  analizándose el reparto de biomasa y crecimiento. Las mayores tasas de mortalidad se registraron tras el primer verano, con  efecto negativo del tratamiento HL sobre la supervivencia de encina y pino, y poco efecto  de la exclusión. Bajo sombra, las tasas de supervivencia fueron mayores. La supervivencia estuvo íntimamente relacionada con su comportamiento fisiológico,  modificado por el ambiente lumínico y la época del año, pero no por la exclusión. Los resultados confirman la mejor capacidad adaptativa de la sabina y la encina en estas masas mixtas, aunque a largo plazo se reducirá la resiliencia de la encina, afectando a su capacidad rebrotadora.

Citas

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Publicado

2020-02-03

Cómo citar

Pardos Mínguez, M., Madrigal, G., de Dios-García, J., Gordo, J., & Calama, R. (2020). Respuesta temporal al ambiente lumínico y la sequía inducida en el regenerado de una masa mixta en el entorno mediterráneo. Cuadernos De La Sociedad Española De Ciencias Forestales, 45(3), 1-18. https://doi.org/10.31167/csecfv0i45.19876

Número

Sección

Sección especial: Ecología, Ecofisiología y Suelos Forestales

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