Influence of nitrogen fertilizers on chemical composition of energy grass
2016
Adamovics, A., Latvian Plant Protection Research Centre, Riga (Latvia) | Platace, R., Latvia Univ. of Agriculture, Jelgava (Latvia) | Ivanovs, S., Latvia Univ. of Agriculture, Jelgava (Latvia)
Plant biomass is one of the ecological solutions that may be used in future due to the sustainability and availability thereof almost everywhere on earth. Today it is the second most commonly used energy source having 14 % contribution to the world energy consumption. However, production of biomass requires cultivation of grass having a particular chemical content, since grass biomass tends to produce high amounts of ash having negative influence on boilers. There are several indicators characterising the quality of fuel, the content of cellulose, lignocellulose, hemicellulose, and ash are among them. Cellulose and lignin are of a major significance, since they are the main combustible elements of biomass. The research covered the following grass species: reed canary grass, tall fescue, meadow fescue, festulolium, and timothy. The highest hemicellulose content was found in the samples treated with F+N90. The research also showed that, as the applied amount of the fertilizer P80K120 increases, the hemicellulose content in biomass grows, while the cellulose content as well as the ash content are not affected by the nitrogen fertilizer amounts.Analysis on application of various fertilizer norms on grass plants shows the most suitable lignin content in the samples not treated with nitrogen fertilizers. As energy grasses have a lower lignin content and high ash content, nitrogen fertilizer norms did not have notable influence on grass biomass, as compared to timber.
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