Reed canary grass cultivation’s energy efficiency and fuel quality
Laen...
Kuupäev
2017
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The article discusses the energy yield and yield capacity of reed canary grass stands in
semi-natural and cultivated meadows with edaphic conditions most favourable for species
growing on fertile soil. Energy grass production yields have been assessed with respect to the
issues of precipitation, sunshine, and frozen ground. In Estonia, a dried matter level of 4.2–
8.5 t ha-1 of reed canary grass may produce 72.91–147.56 GJ ha-1 gross energy by using 1.48–
3.06 GJ ha-1
input energy, which consequently nets 71.44–1,445.00 GJ ha-1
. The above finding
indicates that 1 MJ input energy enables the production of 2.8 kg dry matter. The efficiency of
energy production (ratio of energy returned on energy invested) depends on the amount of input
energy used to grow and harvest reed canary grass. The input energy payback ratio for the given
case was 48.2–49.4, which was higher than cases with lower and higher dry matter yield levels.
Precipitation during the second part of the Estonian summer, heavy winter snow cover and a
simultaneous frequent lack of frozen ground reduce the productivity of reed canary grass as
energy hay because the winter or early spring harvest cannot be used.
Kirjeldus
Article
Märksõnad
bioenergy, energy payback ratio, fuel quality, harvest yield, phalaris arundinacea, articles