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Influence of fertilisation and harvest time on fuel quality of giant reed (Arundo donax L.) in central Italy
Authors:N. Nassi o Di Nasso  L.G. Angelini  E. Bonari
Affiliation:1. Land Lab, Scuola Superiore Sant’Anna, via Santa Cecilia 3, 56127 Pisa, Italy;2. University of Pisa, Dipartimento di Agronomia e Gestione dell’Agroecosistema (DAGA), S. Michele degli Scalzi 2, 56100 Pisa, Italy;1. National Engineering Research Center for Wood-based Resource Utilization, School of Engineering, Zhejiang A&F University, Linan, Zhejiang 311300, China;2. Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China;1. Department of Agricultural Sciences (DipSA), University of Bologna, Viale Fanin 44, 40127 Bologna, Italy;2. Department of Environmental Engineering, Technical University of Denmark, Building 113, Dk-2800 Kgs. Lyngby, Denmark
Abstract:
The perennial grass giant reed (Arundo donax L.) has been proposed as a promising biomass energy crop in southern Europe. The aim of this study was to investigate the effects of two fertilisation levels (F = 200–80–200 N–P–K kg ha?1; UF = 0–0–0 N–P–K kg ha?1) and two harvest times (A: autumn, W: winter) on the biomass quality of giant reed as a solid fuel for combustion. Different aged crops grown in central Italy (latitude 43°40′N, and longitude10°19′E) in the period of 1996–2005 were collected and analysed. Our results confirmed that giant reed biomass is characterized by a high content of ash and silicon. Giant reed showed an increase in ash content from F to UF and from A to W. The production of biomass from fertilised crops harvested in the autumn may thus be a good method for reducing the ash content by about 20%. The results also showed an improvement in biomass combustion quality in 10-year-old crops due to a lower ash content and higher SiO2/K2O and CaO/K2O ratios, which could contribute to a lower slagging tendency. This research should help to improve our knowledge of the chemical composition of giant reed and presents possible agronomic strategies to combine a high biomass yield with good combustion quality.
Keywords:
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