Šiaudinis Gintaras, Jasinskas Algirdas, Karčauskienė Danutė, Skuodienė Regina, Repšienė Regina
Vėžaičiai Branch of the Lithuanian Research Centre for Agriculture and Forestry, Gargždų 29, LT-96216 Vėžaičiai, Lithuania.
Department of Agricultural Engineering and Safety, Faculty of Engineering, Agriculture Academy, Vytautas Magnus University, Studentu Street 15A, LT-53362 Akademija, Lithuania.
Plants (Basel). 2023 Jun 25;12(13):2441. doi: 10.3390/plants12132441.
With the increasing importance of energy crops, research on potential energy crops is carried out to identify plant species with high productivity and energy value. The field experiment with the new promising energy crop, (wormwood), was executed at the Vėžaičiai Branch of the LAMMC. The soil site was naturally acidic (pH 4.2-4.4). The species was investigated as an energy crop through the evaluation of its biomass productivity and some energetical qualities. According to the three investigation years, DM yield significantly varied depending on the growing season, cutting time and nitrogen rate. The highest average DM yield was observed in 2020-10.58 t ha. On average, the DM yield varied from 6.49 t ha (first cutting) to 11.82 t ha (third cutting). The DM yield was positively correlated with stem height and the mass of one stem. Nitrogen use efficiency (NUE) depended on the growing season, cutting time and nitrogen rate. Both N90 and N180 rates should be used for fertilization. Energy growing analysis (including direct and indirect expenses) revealed that the highest share of energy expenses are due to indirect energy expenses (particularly nitrogen application). EUE (energy utilization efficiency) tends to decrease as a result of increasing nitrogen fertilization. Overall, granules are characterized by a high calorific value.
随着能源作物的重要性日益增加，人们对潜在能源作物进行了研究，以确定具有高生产力和能源价值的植物物种。在立陶宛农业与林业研究所韦扎伊čiai分所对新的有前景的能源作物（艾草）进行了田间试验。土壤场地天然呈酸性（pH值4.2 - 4.4）。通过评估其生物质生产力和一些能量特性，对该物种作为能源作物进行了研究。根据三个调查年份，干物质产量因生长季节、刈割时间和氮肥施用量而有显著差异。2020年观察到最高平均干物质产量为10.58吨/公顷。平均而言，干物质产量从6.49吨/公顷（第一次刈割）到11.82吨/公顷（第三次刈割）不等。干物质产量与茎高和单茎质量呈正相关。氮素利用效率（NUE）取决于生长季节、刈割时间和氮肥施用量。施肥应使用N90和N180这两种用量。能源生长分析（包括直接和间接费用）表明，能源费用的最大份额归因于间接能源费用（特别是氮肥施用）。由于氮肥施用量增加，能源利用效率（EUE）趋于下降。总体而言，艾草颗粒具有高热值。
