Fertilizer and intercropped legumes as nitrogen source for Jerusalem artichoke (Helianthus tuberosus L.) tops for bioenergy

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Epie , K E , Santanen , A , Makela , P S A & Stoddard , F L 2018 , ' Fertilizer and intercropped legumes as nitrogen source for Jerusalem artichoke (Helianthus tuberosus L.) tops for bioenergy ' , Agricultural and Food Science , vol. 27 , no. 3 , pp. 199-205 . https://doi.org/10.23986/afsci.70110

Title: Fertilizer and intercropped legumes as nitrogen source for Jerusalem artichoke (Helianthus tuberosus L.) tops for bioenergy
Author: Epie, Kenedy E.; Santanen, Arja; Makela, Pirjo S. A.; Stoddard, Frederick L.
Contributor: University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
Date: 2018
Language: eng
Number of pages: 7
Belongs to series: Agricultural and Food Science
ISSN: 1459-6067
URI: http://hdl.handle.net/10138/249036
Abstract: Jerusalem artichoke (Helianthus tuberosus L.) produces substantial shoots not used as food. To test its potential as a sustainable bioenergy crop, we studied the effects of synthetic fertilizer and intercropped legumes as nitrogen (N) sources on the growth, aboveground biomass dry matter yield and energy qualities of this crop. Plant height, leaf area index (LAI), SPAD-value, biomass yield, ash content and mineral element composition were determined. Mean aboveground biomass yields were not significantly affected by N source (legume intercrops and synthetic fertilizer) and ranged from 13 to 17 t ha(-1). Remarkably, plants given no fertilizer yielded equally to plants given 90 N kg ha(-1). These results confirm that Jerusalem artichoke, compared to other energy crops, have less need for N and can potentially be sustained by N fixing legumes in an intercropped system. This could reduce or eliminate production and environmental cost in cultivation of biomass feedstock for energy use.
Subject: Helianthus tuberosus
synthetic nitrogen fertilizer
intercropping
legumes
biomass
mineral element composition
YIELD
BIOMASS
CROP
SOIL
COMBUSTION
QUALITY
INULIN
STEMS
4111 Agronomy
416 Food Science
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