TAILIEUCHUNG - Báo cáo khoa học: " Biogeochemical cycles in forests of the "Sierra de Béjar" mountains (province of Salamanca, Spain): decomposition index of the leaf litter"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:" Biogeochemical cycles in forests of the "Sierra de Béjar" mountains (province of Salamanca, Spain): decomposition index of the leaf litter. | 393 Ann Sci For 1995 52 393-399 Elsevier INRA Note Biogeochemical cycles in forests of the Sierra de Bejar mountains province of Salamanca Spain decomposition index of the leaf litter I Santa Regina JF Gallardo Consejo Superior de Investigaciones Cientificas Aptado 257 CSIC Salamanca 37071 Spain Received 7 February 1994 accepted 26 September 1994 Summary Both leaf and total litter decomposition indices were established in 3 forest ecosystems of the Sierra de Bejar mountains a climax Quercus pyrenaica Willd oak forest a paraclimax Castanea sativa Miller sweet-chestnut coppice and a disclimax Pinus sylvestris L Scots pine forest. Higher decomposition rates and higher Jenny s decomposition indices were observed in the Chesnut leaves than in the oak and pine leaves. Under almost identical climatic conditions Chesnut leaves decomposed faster than those of oak and Scots pine. Thus litter accumulation was highest in the pine forest followed by the oak and chestnut forests. litter decomposition forest ecosystems I biogeochemical cycles Resume Cycles biogéochimiques dans 3 forets de la Sierra de Bejar province de Sala-manque Espagne indices de decomposition de la litière. Les indices de decomposition de la litière et des feuilles ont été determines dans 3 forets de la Sierra de Bejar province de Salamanque Espagne une chênaie à Quercus pyrenaica Willd une châtaigneraie à Castanea sativa Miller et une pineraie à Pinus sylvestris L. Les valeurs des indices les plus élevés sont rencontrées dans la châ-taigneraie tandis que la plus grande accumulation de litière se trouve dans la pineraie bien que les conditions climatiques soient simllaires. decomposition de la litière écosystème forestier cycle biogéochimique Correspondence and reprints 394 I Santa Regina JF Gallardo INTRODUCTION The mineralization of the humus and the release of nutrients from the leaf litter is a fundamental process in the bioelement dynamics of the forest ecosystems Vogt et al 1986 . This key role of the .

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