TAILIEUCHUNG - Báo cáo lâm nghiệp: "Sessile oak (Quercus petraea Liebl.) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern France"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Sessile oak (Quercus petraea Liebl.) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern France" | Ann. For. Sci. 62 2005 391-402 INRA EDP Sciences 2005 DOI forest 2005035 391 Original article Sessile oak Quercus petraea Liebl. site index variations in relation to climate topography and soil in even-aged high-forest stands in northern France Laurent BERGÈSa Richard CHEVALiERa Yann DUMASa Alain FRANCb Jean-Michel Gilbertc a Cemagref Forest Ecosystems Research Unit Domaine des Barres 45290 Nogent-sur-Vernisson France b INRA Département Ecologie des Forêts Prairies et Milieux Aquatiques CDA UMR Biodiversité Gènes et Écosystèmes 69 route d Arcachon Pierroton 33612 Cestas Cedex France c Ministère de l Agriculture de l Alimentation de la Pêche et de la Ruralité Direction Générale de la Forêt et des Affaires Rurales 19 avenue du Maine 75732 Paris Cedex 1507 SP France Received 5 April 2004 accepted 2 March 2005 Abstract - The relationships between Q. petraea site index and site variables were studied using data from 99 even-aged high-forest stands located in north-western and north-eastern France. Stepwise multiple regressions using climate topography and soil factors were adjusted and explain 49 to 60 of the variance in site index. This clearly demonstrates that an autecological study can be successfully performed over a large geographical area if an appropriate sampling strategy is applied. Moreover the autecology of sessile oak was specified 1 the role of soil water capacity topographic position log Mg log S K P2O5 Mg K and humus form was emphasized 2 no regional differences in site index were observed which was corroborated by few climatic effects 3 models adjusted to each region were consistent 4 nutrient factors explained a higher portion of variance of Q. petraea site index compared to climate water-related factors however the confounding effect was significant. site index ecological factors soil analyses Quercus petraea Mattus Liebl. Résumé - Variations de l indice de fertilite du chêne sessile Quercus petraea Liebl. en fonction du climat de la .

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