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Nitrogen retention in vegetation filters of short-rotation willow coppice

Aronsson, Pär (2000). Nitrogen retention in vegetation filters of short-rotation willow coppice. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230
ISBN 91-576-5895-1
[Doctoral thesis]

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Irrigation of short-rotation willow coppice (SRWC) is a potentially efficient way of treating various types of wastewaters. In this thesis the nitrogen retention capacity in such cropping systems (vegetation filters) is assessed both within season and for several years and rotations. In addition, the retention and potential leaching of viruses in such systems are assessed. The experimental work was carried out in two types of lysimeters and in experimental fields.
Nitrogen leaching loads from wastewater irrigated willow vegetation filters can be high or very high during the establishment phase (i.e. the year of planting), and thus, during establishment, neither wastewater nor commercial fertilizers should be applied to the crop. However, once established, nitrogen leaching loads from willow vegetation filters are low or very low, enabling high inputs of nitrogen-rich wastewater. Within reasonable limits, nitrogen leaching loads are independent on irrigation rates and thus dosing of wastewater should be based of nitrogen loads. The nitrogen retention in a willow vegetation filter (up to in the order of 200 kg N/ha-yr) is due to plant uptake and incorporation into woody tissue (including harvestable shoots), and to a build-up of the pool of soil organic matter. In addition, gaseous nitrogen losses (primarily due to denitrification) are probably substantial.
Preferential flow of water in cracks and fissures can facilitate a rapid transport of viruses applied to a structured clay soil, and within a few hours viruses might reach the groundwater. However, in a sandy, non-structured soil, viruses are efficiently retained in the soil mainly as a result of strong electrostatic interaction between viruses and soil colloids.

Authors/Creators:Aronsson, Pär
Title:Nitrogen retention in vegetation filters of short-rotation willow coppice
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Silvestria
Year of publishing :2000
Number of Pages:39
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:91-576-5895-1
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:willow, Salix viminalis, coppice, nitrate leaching, nitrogen retention, groundwater quality, lysimeter, virus, bacteriophages
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ID Code:17766
Faculty:S - Faculty of Forest Sciences
Department:(S) > Institutionen för lövträdsodling (960101-050630)
Deposited By: SLUpub Connector
Deposited On:08 Oct 2020 16:27
Metadata Last Modified:05 Nov 2020 07:55

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