Réduire les émissions de gaz à effet de serre et produire du bois d’oeuvre de Chêne sessile en 100 ans en futaie régulière : deux objectifs conciliables ?

Abstract : For over a decade, reducing emissions of greenhouse gases (GHG) has been a core preoccupation for our societies. Scientists have sought to demonstrate the potential of forests for reducing GHG emissions. Silvicultural practices affect the growth of forests, raising the question of the impact of different silvicultural schemes on the carbon balance of forest stands. In this study, we assess the carbon balance of a sessile oak stand that follows a very dynamic scheme proposed for private forests. The aim of this scheme defined by Lemaire (2010) is to produce timber from sessile oak within 100 years. We use a chain of growth and quality models developed in our laboratory to estimate carbon stocks in forests and in wood products. A comparison between the results of this study and similar studies shows that the dynamic scheme maintains carbon stocks at 50 tC/ha on average. This value is however lower than those derived from a conventional scheme (Fortin et al., 2012). Substitution of fossil energy by wood products (0.5 tC/ha/year) is also lower on average. In short, the dynamic scheme produces sessile oak timber more quickly, but it does so at the expense of the carbon balance. However, the effect of storms on the carbon footprint has yet to be quantified and could alter this conclusion.
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Mathieu Fortin, François Ningre. Réduire les émissions de gaz à effet de serre et produire du bois d’oeuvre de Chêne sessile en 100 ans en futaie régulière : deux objectifs conciliables ?. Revue Forestière Française, Ecole nationale du génie rural, 2012, ⟨10.4267/2042/48443⟩. ⟨hal-01591106⟩

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