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Energy assessment of Miscanthus x giganteus cultivation based on H.T. Odum's energy value theory

100%

Brzychczyk B., Gielzecki J.

Acta Agrophysica

2016

tom 23

nr 3

The subject matter of an emergy analysis was the environmental system of a model miscanthus×giganteus cultivation. Assessment of environmental work contribution to the cultivation of renewable biomass was performed based on the energy value theory (EVT) created by Howard T. Odum, which combines the principles of thermodynamics, ecology and economics by means of a single unit of measurement – emergy. The concept of emergy is based on energy transformation ratio between each elements of the ecosystem and emergy is a measure of quality differences between different forms and streams of energy. Flow of energy and materials between the environment and the model cultivation was determined. The analysis of emergy allowed the evaluation of all identified streams that power the analysed system, especially the ones which are omitted by traditional economics due to inability to price or to common availability. EVT, whose principles are based on transformation of primary solar energy that powers all systems within the cycle of life on our planet, opens the real environmental costs for assessment. In order to determine and consider the value of environment in the process of biomass production, a basic study was conducted for a model cultivation of miscanthus within the scope of elemental analysis of collected biomass and soil. An attempt was made at the assessment of environmental contribution into a renewable energy source, that is, biomass. The results showed that the contribution of soil components emergy in the creation of biomass was the most significant. Renewability of the analysed system reached 18%, which proves considerable instability of the system. Eighty two percent of environmental contribution into the formation of renewable biomass was constituted by non-renewable sources which may result in degradation of the local ecosystem over a short period of time. Cultivation requires to be supplied with basic nutrients in order to restore environmental balance. The cost of environmental contribution not considered by humans was circa 314 $ yearˉ¹.

Energetyczna ocena różnych technologii zbioru siana

37%

Kisiel R., Kucka E., Kaliszewicz D.

Acta Academiae Agriculturae ac Technicae Olstenensis. Oeconomica

1988

nr 21

Ograniczanie wyników

1 Acta Academiae Agriculturae ac Technicae Olstenensis. Oeconomica

1 Acta Agrophysica

1 Brzychczyk B.

1 Gielzecki J.

1 Kaliszewicz D.

1 Kisiel R.

1 Kucka E.

1 2016

1 1988

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Energy assessment of Miscanthus x giganteus cultivation based on H.T. Odum's energy value theory

Energetyczna ocena różnych technologii zbioru siana