13/03/2018    Christophe Orazio.


Site code DS32

Location Raslay

Region Poitou-Charentes

Country France

Local name Les Granges

Partner IDF-CNPF


Site characteristics

Orientation: FLAT, Slope:0.0°, Soil :CAMBISOLS, Bedrock : marine and estuarine sands

PH :4.5,



Short History of the site

The global objective is to develop a new silviculture to slow down the impacts of climatic changes and to maintain the high quality wood production of oak. The objective of the demonstration site is to study the impact of the late thinning on the sanitary state (problem of oak dieback) of oaks stands (Quercus robur).The demonstration site is installed in the high sensibility area for oak in France. This high sensibility area was validated in the project : « Climate Change: The risks for the oak stands in the Atlantic region” in France. This project was managed by the CNPF – IDF (Lemaire et al., 2010). Stand is about 80 years old. This stand is affected by dieback due to climate change. The studies conducted in France (Protocol ARCHI by Drenou et al., 2011) demonstrate that it is possible to distinguish oaks able to surmounting a stress (tree in the reversible sanitary state) from those which are not able to (tree in the irreversible sanitary state). This diagnostic (with four different sanitary states) turns out to be indispensable to help the forester to select the most resistant trees in the context of the climate change. The sanitary state of each oak in the demonstration site was identified. After, for all the different sanitary state, we test a localized thinning (“détourage”). The sanitary state of this thinned oak stand will be compared with the sanitary state of a not thinned oak stand. The demonstration site is composed of two devices: 1 device « témoin » = no thinning 1 device thinning = « détourage »