tailieunhanh - Báo cáo khoa học: "Quantification of nutrient content in above-ground biomass of young Acacia mearnsii De Wild., provenance Bodalla'

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Quantification of nutrient content in above-ground biomass of young Acacia mearnsii De Wild., provenance Bodalla. | Ann. For. Sci. 59 2002 833-838 INRA EDP Sciences 2002 DOI forest 2002081 833 Original article Quantification of nutrient content in above-ground biomass of young Acacia mearnsii De Wild. provenance Bodalla Marcos Vinícius Winckler Caldeiraa Mauro Valdir Schumachera and Peter Spathelfb a Universidade Federal de Santa Maria - Departamento de Ciências Florestais Av. Roraima S N Camobi CEP 97105-900 Santa Maria RGS Brazil b Forstdirektion Tubingen Im Schloss 72074 Tubingen Germany Received 28 February 2001 accepted 28 November 2001 Abstract - The present study deals with the quantification of the nutrient content of the Australian acacia Acacia mearnsii De Wild. provenance Bodalla at the age of 28 months. The experiment is located at a site of low fertility of the AGROSETA company in Butiá Rio Grande do Sul Brazil . Above-ground biomass components leaves living branches dead branches bark and wood of nine sampled trees were analysed. The nutrient contents in the total biomass of Bodalla were 182 kg ha-1 of N of P 104 of K of Ca of Mg and of S. In total of the dry matter accounted for leaves and living and dead branches which in turn account for 74 of N 72 of P 63 of K 68 of Ca 69 of Mg and 74 of S of the above-ground biomass. In the trunk bark and wood which represents the remaining of the total above-ground biomass 26 of N 28 of P 37 of K 32 of Ca 31 of Mg and 26 of S were accumulated. Acacia mearnsii De Wild. biomass nutrients mineralmass biogeochemical cycles Résumé - Quantification des nutriments dans la biomasse aérienne de jeunes Acacia mearnsii De Wild. provenance Bodalla. Cette étude concerne la quantification à l âge de 28 mois des nutriments dans la biomasse aérienne de l Acacia australien Acacia mearnsii De Wild. provenance Bodalla. L expérience est localisée dans un site de faible fertilité appartenant à la compagnie AGROSETA à Butiá Rio Grande do Sul Brésil . Les compartiments de la biomasse aérienne feuilles branches