tailieunhanh - Báo cáo lâm nghiệp: "Effect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Effect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil. | Ann. For. Sci. 63 2006 763-771 INRA EDP Sciences 2006 DOI forest 2006057 763 Original article Effect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil Judicael M0UK0UMla b Colette MUNlER-LAMYa Jacques BERTHELlNa Jacques RANGERb a Laboratoire des Interactions Microorganismes Minéraux Matières Organiques dans les Sols LIMOS UMR 7137 CNRS-UHP Nancy I Faculté des Sciences BP 239 54506 Vandreuvre-lès-Nancy Cedex France b Laboratoire de Biogéochimie des Écosystèmes Forestiers BEF-INRA Centre de Recherche Forestière 54280 Champenoux France Received 4 July 2005 accepted 27 January 2006 Abstract - In the Breuil-Chenue experimental site Morvan France the native forest a 150-year-old coppice with standards dominated by beech was partly clear-cut thirty years ago and replanted with several tree species. Soil samples were collected from the A1 horizon in the 0-5 cm layer of the preserved native forest and three plantations European beech Douglas-fir and Norway spruce. Aliquots of 0-2 mm sieved soils were incubated for 40 days under laboratory conditions 15 C water-holding capacity . Carbon-mineralization was monitored mineral nitrogen water-extractable organic carbon and mineral elements were determined before and after the incubation. The release of CO2 decreased in the order spruce native forest beech Douglas-fir whereas nitrogen net mineralization decreased in the opposite order. Douglas-fir and beech soils were characterised by high nitrification activity and high solubilization of Ca Mg and Mn. Native forest and spruce soils were characterized by low nitrification activity high carbon-mineralization and high solubilization of Fe and Al. forest tree species substitution topsoil organic matter biodegradability nutrient availability carbon and nitrogen mineralization Résumé - Effet de la substitution des essences forestieres sur la biodégradabilité des matières organiques et la disponibilité des .