air, water and soil quality qualité - ER Ambiente - Regione Emilia ...
air, water and soil quality qualité - ER Ambiente - Regione Emilia ...
air, water and soil quality qualité - ER Ambiente - Regione Emilia ...
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.SOIL AND LAND QUALITIES INFLUENCE<br />
FOREST DECLINE IN THE VENETIAN PLAIN (NE ITALY)<br />
INFLUENCE DE LA QUALITÉ DU SOL<br />
ET DU T<strong>ER</strong>ROIR SUR LA DEGRADATION DES BOISEMENTS<br />
DE LA PLAINE VENETIENNE (N-E ITALIE)<br />
L’INFLUENZA DELLE QUALITÀ DEL SUOLO<br />
E DEL T<strong>ER</strong>RITORIO SUL DECLINO DEI BOSCHI PLANIZIALI<br />
IN VENETO (ITALIA NORD-EST)<br />
Claudio Bini*, Gabriella Buffa , Elisa D’Onofrio, Diana Maria Zilioli<br />
Dipartimento di Scienze Ambientali, Università Ca’ Foscari di Venezia<br />
Dorsoduro, 2137 – 30123 Venezia (Italy)<br />
* Corresponding author: e-mail: bini@unive.it<br />
Summary<br />
Forest decline in the Venetian plain (NE Italy) is a major concern. Particularly<br />
English Oak (Quercus robur) looks seriously damaged, being in strong ecological<br />
competition with Common Hornbeam. A survey was planned in six forests located<br />
at different sites in the Venetian territory, in order to obtain more information on<br />
<strong>soil</strong> qualities in relation with forest health, <strong>and</strong> to suggest possible restoration<br />
strategies.<br />
The areas investigated were located in the lower portion of the Holocene alluvial<br />
plain. Microtopography determined significant differences in <strong>soil</strong> hydrological<br />
regime, <strong>and</strong> therefore the whole area is strongly influenced by the ground<strong>water</strong><br />
level, which conditions the <strong>soil</strong> <strong>quality</strong>. Most <strong>soil</strong>s are Inceptisols <strong>and</strong>/or have<br />
aquic/oxyaquic properties which may enhance forest decline. Soil drainage control<br />
<strong>and</strong> changes in present l<strong>and</strong> management are suggested so as to create favourable<br />
conditions for oak growth.<br />
Key words: Soil <strong>quality</strong>; forest decline; <strong>soil</strong> hydrology.<br />
Résumé<br />
Un examen des forêts de la plaine vénetienne a montré qu’elles étaient endommagées<br />
par des <strong>qualité</strong>s du sol et du terroir qui sont à l’origine de problèmes de croissance<br />
et de régenération du peuplement et surtot de la chênaie, en compétition avec<br />
la charmille.<br />
Les observations sur les sols à nappe tempor<strong>air</strong>e et les relevés phytosociologiques<br />
conduits dans six bois de la plaine de Venise (N-E Italie) ont permis de vérifier<br />
l’impact de la microtopographie, de l’hydrologie, de la composition des sols et de<br />
la gestion forestière orientée vers les arbres de haute tige dont l'habitat est de plus<br />
en plus isolé, sur la dégradation du peuplement.<br />
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