The shift from a fossil economy to a biological economy will stimulate the demand for bio-based energy generation. One promising strategy to meet the growing demand for biomass for energy production is to re-cultivate abandoned arable land. The digestate fertilisation approach for the sake of increased biomass yields is the key strategy towards more sustainable biogas generation in many regions. To minimise digestate utilisation costs, biogas plant operators seek to spread the liquid digestate as close as possible to its storage location. The present work is focused on the evaluation of the digestate impact on the eroded agricultural soil, the improved biomass yield of semi-natural grassland biomass and its biogas potential. Three-year field experiment results indicate the positive effect of solid and liquid digestate on soil fertility and quality. The amount of dissolved organic carbon in eroded loamy Retisol increased 3.7% and 15% in soil 0–10 cm layer with fertilisation rate of 170 kg ha⁻¹ N of liquid and solid digestate, respectively. In terms of total nitrogen, 11.6% and 20% increases were achieved using 170 kg ha⁻¹ N of liquid and solid digestate compared to unfertilised. Furthermore, the grass fresh biomass yield was up to 3 times higher compared to the unfertilised yield. The biomethane yield of biomass from digestate-fertilised fields was higher for every fertilisation rate applied. The highest biomethane yield was for 170 kg N ha⁻¹ liquid digestate applied, yielding 19% more biogas compared to untreated field biomass due to both increased biogas yield and increased methane content.

从化石经济向生物经济的转变将刺激对生物能源的需求。满足能源生产对生物质不断增长的需求的一种有前景的策略是重新耕种废弃的耕地。为提高生物质产量而采用的沼渣施肥方法是许多地区实现更可持续沼气生产的关键策略。为了最大限度地降低沼渣利用成本，沼气厂运营商寻求将液体沼渣尽可能靠近其储存位置。目前的工作重点是评估消化物对侵蚀农业土壤的影响，提高半天然草地生物质的生物质产量及其沼气潜力。三年田间试验结果表明固体和液体消化物对土壤肥力和质量的积极影响。^-1 N 的液体和固体消化物，分别。就总氮而言，与未施肥相比，使用 170 kg ha ^-1 N 的液体和固体消化物可实现 11.6% 和 20% 的增加。此外，与未施肥的产量相比，草的新鲜生物质产量高达 3 倍。每施肥一次，来自沼液施肥田的生物质的生物甲烷产量都较高。最高的生物甲烷产量是应用 170 kg N ha ^-1液体消化物，由于沼气产量增加和甲烷含量增加，与未处理的田间生物质相比，产生的沼气多 19%。