Field studies evaluating the efficiency of anaerobic digestates (AD) as fertilizers often present variable results, mainly due to the effects of weather, site, soil conditions, and differences in the application technique. To better understand the soil influence on the effects of AD application on crop growth, we excluded site-specific effects of weather conditions and application technique and their interaction. A two-year experiment was conducted in southeast Germany, where pits were excavated in the field and re-filled with soils from seven Bavarian regions. Winter wheat followed by spring wheat was grown on the plots. The fertilized treatments were (i) mineral fertilizer alone (MIN), (ii) acidified anaerobic digestate plus mineral fertilizer application (ADM), and (iii) an unamended control treatment. Fertilized plots received nitrogen split into three dressings, amounting to 40-100−40 N kg ha⁻¹ based on the NH₄⁺ content. In the ADM treatment, the AD was applied in the second dressing, interspersed with mineral fertilization in the first and third dressings. Treatments were applied to the same plots in both years. Results showed that in the 1^st-experimental year, the soil influence on crop parameters was more pronounced compared to the second year. The principal component analysis revealed that yield and grain number per spike were higher related to soil characteristics. The apparent nitrogen utilization based on the NH₄⁺ content negatively correlated with the soil’s initial amount of mineral nitrogen. In the 2^nd-experimental year, the effect of different fertilizer sources was more evident, and a trendy higher global effect on the crop parameters could be perceived in soils amended with the ADM treatment compared to those receiving only mineral fertilizers. Overall, the application of acidified and injected anaerobic digestate combined with mineral fertilizer was as effective as solely mineral nitrogen fertilizer application, with applied nitrogen based on the ammonium content, and the effect of different soils in the actual year of anaerobic application varied not markedly.

评估厌氧消化物（AD）作为肥料的效率的现场研究通常会得出不同的结果，这主要是由于天气，场地，土壤条件和施用技术的差异所致。为了更好地了解土壤对AD施用对作物生长的影响，我们排除了天气条件和施用技术及其相互作用的特定地点影响。在德国东南部进行了为期两年的实验，在该场中挖出了矿坑，并重新填充了巴伐利亚七个地区的土壤。地块上种有冬小麦，然后种春小麦。受精处理为（i）单独使用矿物肥料（MIN），（ii）酸化厌氧消化液加上矿物肥料施用（ADM），以及（iii）未经修正的对照处理。^-1基于NH ₄ ⁺含量。在ADM处理中，AD用于第二种敷料，并在第一和第三种敷料中穿插矿物质肥料。在这两年中，对相同的地块进行了处理。结果表明，在1^日-实验的一年，对作物参数土壤的影响更为明显比的第二年。主成分分析表明，产量和每个穗粒数与土壤特性有关。基于NH ₄ ⁺含量的表观氮利用量与土壤初始矿质氮含量负相关。在^第二试验年，不同肥料来源的影响更为明显，与仅使用矿物肥料的土壤相比，在用ADM处理改良的土壤上，可以感觉到对作物参数的趋势更高的全球性影响。总体而言，酸化和注入的厌氧消化物与矿物肥料的结合使用与单纯矿物氮肥的施用一样有效，氮的施用基于铵含量，并且在实际厌氧施用年中不同土壤的影响差异不明显。