Evaluation of biomass yield and quality of energy crops in Lithuania

摘要

The objective of this research was to study biomass potential and quality of 14 plant species grown for bioenergy. The tested plants were divided into groups. In the imported plants group, the highest dry matter yield (9.58 t ha~(-1)) was produced bySida hermaphrodita when cut once. Other plants of this group were less productive: dry biomass yield of Silphium peifoliatum was 7.29 t ha~(-1), and Polygonum japonica and Polygonum sachalinensis were 8.74 and 5.13 t ha~(-1), respectively. Of the non-traditional plants, the highest biomass content was accumulated by Artemisia dubia (11.10 t ha~(-1)) and Helianthus tuberosus (8.56 t ha~(-1)) and 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 ha~(-1) dry biomass over 3 cuts. The lowest ash contents (2.80-3.95 g kg~(-1)) were accumulated in the biomass of Miscanthus and Artemisia vulgaris. Higher sulphur contents accumulated in traditional grasses that had been cut more frequently. The lowest sulphur contents were accumulated in Polygonum, Artemisia, Miscanthus, Silphium and Sida plants. The choice of plants intended for bioenergetics will depend on specific local conditions, needs and circumstances.