Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
678479 | Biomass and Bioenergy | 2009 | 9 Pages |
Abstract
Fifty biomass production model trees were analysed in 7-yr-old commercial hybrid aspen plantations established on abandoned agricultural land in Estonia. Above-ground leafless biomass (ALB) of the model trees varied from 0.1 to 9.8 kg DM. The ALB of plantations with a density of 880-1340 trees haâ1 growing on former field soils was between 2.18 and 8.54 t DM haâ1. The amount of nitrogen accumulated in the ALB varied between 14.4 and 48.5 kg haâ1, the amount of phosphorus, between 1.7 and 5.9 kg haâ1, and the amount of potassium, between 6.5 and 21.9 kg haâ1. The removal of major mineral nutrients from the site with the removal of woody biomass in 7-yr-old plantations would be relatively small, constituting 0.5-3.4% of the nutrient pool in the humus layer of the previously fertilized field soils. The stembark content decreases rapidly until the DBH reaches 4 cm, which can be considered a target diameter for the hybrid aspen coppicing system.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Arvo Tullus, Hardi Tullus, Tea Soo, Linnar Pärn,