Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Lysimetric study of eucalypt residue management effects on N leaching and mineralization. | Ann. For. Sci. 64 2007 699-706 INRA EDP Sciences 2007 DOI forest 2007050 Available online at Original article Lysimetric study of eucalypt residue management effects on N leaching and mineralization María X. Gomez-Rey Ernesto Vasconcelos Manuel Madeira Departamento de Ciências do Ambiente Institute Superior de Agronomia Tapada de Ajuda 1349-017 Lisboa Portugal Received 13 September 2006 accepted 2 February 2007 Abstract - The effects of woody residues from Eucalyptus globulus Labill. plantations on N losses were assessed through a lysimetric experiment. Treatments were NW forest floor litter and non-woody residues leaves bark twigs incorporated into the soil IP as NW plus woody residues branches cut in 20-cm long pieces and incorporated into the soil IC as IP but with branches chopped into chips SP non-woody and woody residues pieces placed on the soil surface SC as SP plus branches chopped into chips and CT absence of organic residues. Leaching of N-NO- and N-NH was followed during a six-year period and N mineralization was evaluated at the end of the experiment. Non-woody residues enhanced N leaching as compared with the control. Conversely woody residues decreased N losses. Although differences between treatments were not significant at the end of the experiment incorporation and fragmentation of woody residues resulted in the more favourable management option regarding the reduction of N leaching observed at short-term. As high amounts of residues were used the effect observed on decrease N leaching could be higher than that existing in Portuguese eucalypt plantations. harvest residues N mineralization Eucalyptus globulus N leaching residue quality Résumé - Étude lysimétrique des effets de la gestion des rémanents d exploitation sur la lixiviation et la mineralisation d azote. Les effets des restitutions de matière ligneuse de plantations d Eucalyptus globulus Labill. sur la lixiviation d azote ont été mesurés au travers d une .
