Abstract Sweet sorghum (Sorghum bicolor (L.) Moench) is an energy crop with low soil requirements (high tolerance to low-quality soils) that can potentially compete with the maize (Zea mays L.) monocultures. This paper presents the results of a 6-year field experiment investigating the biomass yield and energy efficiency of sweet sorghum grown under high-input and low-input production technologies. The experiment was conducted in north-eastern Poland. Dry matter yield was higher in the high-input production technology (15.4 Mg ha−1). Biomass yield in the low-input production technology was 16 % lower on average. The demand for energy in the production of sweet sorghum biomass was determined by the energy inputs associated with farming operations in the compared production technologies. The low-input technology was characterized by lower energy consumption (14.9-15.8 GJ ha−1). Energy inputs increased by 46 % in the high-input technology of sweet sorghum production. The energy gain of sweet sorghum biomass ranged from 170 (low-input technology) to 226 GJ ha−1 (high-input technology). In north-eastern Poland, the energy efficiency of sweet sorghum biomass was higher in the low-input technology.

中文翻译：

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甜高粱 - 不同农业投入水平的生物质生产和能量平衡。在波兰东北部进行为期六年的田间试验

摘要 甜高粱 (Sorghum bicolor (L.) Moench) 是一种对土壤要求低（对低质量土壤具有高耐受性）的能源作物，可能与玉米 (Zea mays L.) 单一栽培竞争。本文介绍了一项为期 6 年的田间试验结果，该试验调查了在高投入和低投入生产技术下种植的甜高粱的生物质产量和能源效率。实验在波兰东北部进行。高投入生产技术（15.4 Mg ha-1）的干物质产量更高。低投入生产技术的生物质产量平均低 16%。甜高粱生物质生产中对能源的需求取决于与比较生产技术中的农业经营相关的能源投入。低投入技术的特点是能耗较低（14.9-15.8 GJ ha-1）。甜高粱生产高投入技术能源投入增加46%。甜高粱生物质的能量增益范围从 170（低投入技术）到 226 GJ ha-1（高投入技术）。在波兰东北部，低投入技术的甜高粱生物质能效更高。