Biomass potential of plants grown for bioenergy production
2012
Slepetys, J., Lithuanian Research Centre for Agriculture and Forestry, Akademija (Lithuania). Inst. of Agriculture | Kadziuliene, Z., Lithuanian Research Centre for Agriculture and Forestry, Akademija (Lithuania). Inst. of Agriculture | Sarunaite, L., Lithuanian Research Centre for Agriculture and Forestry, Akademija (Lithuania). Inst. of Agriculture | Tilvikiene, V., Lithuanian Research Centre for Agriculture and Forestry, Akademija (Lithuania). Inst. of Agriculture | Kryzeviciene, A., Lithuanian Research Centre for Agriculture and Forestry, Akademija (Lithuania). Inst. of Agriculture
In 2010 and 2011, we established the biomass potential of 14 grass species and 3 tree species grown for bioenergy purposes. The tested plants were divided into groups. In the imported plants’ group, the highest dry matter yield (9.58 t haE-1) was produced by Sida hermaphrodita when cut once. Other plants of this group were less productive: dry biomass yield of Silphium perfoliatum was 7.29 t haE-1, of Polygonum japonica, Polygonum sachalinensis 8.74-5.13 t haE-1, respectively. Due to the cold and snowy two winters, Miscanthus giganteum three-four year old stand severely thinned out and the yield declined to 7.14 t haE-1, at N60-120 kg haE-1 fertilization level. Of the non-traditional plants, the highest biomass content was accumulated by Artemisia dubia (11.10 t haE-1) and Helianthus tuberosus (8.56 t haE-1), Artemisia dubia biomass was 3.3 times as high as that of Artemisia vulgaris. In the group of local plants, unfertilized Galega orientalis produced 10.98 t haE-1 dry biomass over 3 cuts. N120 kg haE-1 –applied Phalaris arundinacea produced 9.89 t haE-1. Other legumes, Medicago sativa and Onobrychis viciifolia, in the sowing year and first year of use produced little biomass 6.16-5.21 t haE-1. Forest plants were cut in the autumn of 2010 after 3 growing seasons (2008-2010). The largest amount of dry biomass was produced by Salix viminalis 32.7-38.1 t haE-1 and Populus nigra 24.0-33.0 t haE-1. When forest plants were grown in arable land, nitrogen fertilization had little effect on biomass yield, a biomass reduction trend was observed at N120 kg/ha fertilization. Salix viminalis had also low nitrogen and sulphur contents. Salix viminalis was best suited for combustion.
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