Ciencias Agrarias >
Instituto de Investigaciones Agrobiológicas de Galicia (IIAG) >
(IIAG) Artículos >
Open Access item Long- term effects of fire and three fire-fighting chemicals on a soil-plant system.
|Keywords:||flame retardants, δ 15N, macro-nutrients, micro-nutrients, shrubs, trees|
|Publisher:||Commonwealth Scientific and Industrial Research Organization (Australia)|
|Citation:||International Journal of Wildland Fire 20: 856-865 (2011)|
|Abstract:||The impacts of fire and fire-fighting chemicals (FFC) on soil properties and the soil-plant system were
evaluated five years after treatment application. Unburnt soils (US) were compared with burnt soils treated with
water alone (BS) or with foaming agent (BS+Fo), Firesorb polymer (BS+Fi), or ammonium polyphosphate
(BS+Ap). Soils (0-2 cm depth) and foliar material (Ulex micranthus, Pterospartum tridentatum, Erica
umbellata and Pinus pinaster) were analysed for total-C, total-N, δ 15N, nutrients (soil-available; plant-total), pH
and inorganic-N (soils) and vegetation cover and height. No long-term effects of FFC on soil properties were
found except for pH (BS+Fo > BS+Ap), inorganic-N and P (BS+Ap > other treatments). BS+Ap plants usually
showed higher values of δ 15N, N, P and Na, but less K. Soil coverage by Pterospartum and Ulex was higher in
BS+Ap than in other treatments, while the opposite was observed for Erica; shrubs were always taller in
BS+Ap. After 3 years of growth, the size of pine seedlings followed the order BS+Ap > US > other treatments.
Foliar N and P, scrub regeneration and growth of pines showed the long-term fertilizing effect of ammonium
polyphosphate, although the second highest pine mortality was found in the BS+Ap treatment. The foaming
agent did not affect vegetation cover, and Firesorb had no noticeable effect on shrubs but the highest pine
|Appears in Collections:||(IIAG) Artículos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.