Ash content in grass biomass yielded in 1st and 2nd cultivation year and evaluation of suitability thereof for pellet production
2015
Platace, R., Latvia Univ. of Agriculture, Jelgava (Latvia) | Adamovics, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Poisa, L., Latvia Univ. of Agriculture, Jelgava (Latvia) | Cubars, E., Rezekne Higher Education Institution (Latvia) | Bumane, S., Latvian Plant Protection Research Centre, Riga (Latvia)
One of the solutions for growing energy problems may be use of biomass; however heat production requires plants with particular characteristics. One of the biomass sources used for pellet production may be grass, nevertheless, it is a potential for high ash content leading to problems in the combustion process. Total ash content in grass biomass ranges between 2 % and 20 %. Research aims at measuring and characterising ash content in grass biomass yielded in 1st and 2nd cultivation year depending on the types and doses of fertilisers applied. It was found that the ash content in reed canary grass and tall fescue reduced (by 6.2 % and 6.7 %) and in festulolium, timothy and meadow fescue it increased (by 6.6 %, 6.7 % and 6.4 %). The data acquired show that grass biomass has high ash content; therefore it would be useful to produce pellets when mixing it with wood. High and high-quality grass yield requires application of nitrogen fertilisers, as they are among the key nutrients. In the research, average nitrogen content in tall fescue biomass dropped by 0.3 %, but it grew in biomass of reed canary grass (0.6 %), festulolium and timothy (0.5 %), meadow fescue (1.8 %).
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