| Titre : | Alternative silvicultural systems in chestnut (Castanea sativa Mill.) coppice: Effects of silvicultural practices on stand structure and tree growth |
| Auteurs : | Emilio Amorini, Auteur ; Silvia Bruschini, Auteur ; Maria Chiara Manetti, Auteur |
| Type de document : | Article |
| Dans : | Ecologia Mediterranea (26(1-2) 2000) |
| Article en page(s) : | 155-162 |
| Résumé : | The results of experimental investigations carried out by the Istituto Sperimentale per la Selvicoltura of Arezzo in the framework of national and european projects in order to define a sustainable silvicultural treatment for chestnut (Castanea sativa Mill.) coppice able to improve timber production, are reported. Silvicultural models alternative to short rotation coppice have been defined on the basis of early, frequent and of moderate-heavy intensity thinnings in order to: i) differentiate the traditional management under coppice system, ii) to increase the production of quality assortments, iii) to establish more functional and valuable stands from an ecological and environmental point of view. The aim of this study is to test the formulated silvicultural models throughout the evaluation of growth rhythm and of structural rearrangement by means of silvicultural treatments carried out with different intensities in coppices of different age. The experimental surveys have been carried out in young (15 years) and aged (38-42 years) coppice stands, located on Monte Amiata (Central Italy) at elevation between 800 and 1200 m a.s.l., on rich soils from volcanic substratum. The results confirm the high dynamism of coppices even at the older ages, the high sensitivity of the species to thinnings and the fast rearrangement of social ratios which determines the re-establishment of one-storeyed stands in a short time. In young coppices thinning practices (moderate-high intensity low thinnings) determine the fast re-establishment of a numerically conspicuous dominated layer only four years after the operation. In old coppices, low thinnings of moderate intensity stimulate the reactivity of dominant trees which support the sustained growth as a function of the gradual re-establishment of the canopy cover. |
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