The aim of this study was to evaluate the potential of short rotation alley cropping systems (SRACS) to improve the soil fertility of marginal post-mining sites in Brandenburg, Germany. Therefore, we annually investigated the crop alleys (AC) and black locust hedgerows (ABL) of a SRACS field trail under initial soil conditions to identify the short-term effects of tree planting on the storage of soil organic carbon (SOC) and its degree of stabilization by density fractionation. We detected a significant increase in SOC and hot-water-extractable organic C (HWEOC) at ABL, which was mainly restricted to the uppermost soil layer (0–10 cm). After 6 years, the SOC and HWEOC accumulation rates at ABL were 0.6 Mg and 46 kg ha⁻¹ year⁻¹, which were higher than those in the AC. In addition, comparatively high stocks of approximately 4.6 Mg OC and 182 kg HWEOC ha⁻¹ were stored in the ABL litter layer. Density fractionation of the 0–3 cm soil layer at ABL revealed that the majority of the total SOC (47%) was stored in the free particulate organic matter fraction, which was more than twice that of the AC. At the same time, a higher and steadily increasing amount of SOC was stored in the occluded particulate organic matter fraction at ABL, which indicated a high efficiency for SOC stabilization. Overall, our findings support the suitability of black locust trees for increasing the soil fertility of the reclaimed mining substrate and, consequently, the high potential for SRACS to serve as an effective recultivation measure at marginal sites.

这项研究的目的是评估短轮转胡同种植系统（SRACS）的潜力，以提高德国勃兰登堡边际采矿场的土壤肥力。因此，我们每年在原始土壤条件下调查SRACS田间径的农作物小径（AC）和刺槐树篱（ABL），以确定植树对土壤有机碳（SOC）储存及其程度的短期影响通过密度分级的稳定性。我们发现ABL的SOC和可热水提取的有机碳（HWEOC）显着增加，这主要限于最上层的土壤层（0-10 cm）。6年后，ABL的SOC和HWEOC累积速率分别为0.6 Mg和46 kg ha - ¹ 年^-1，比AC中的要高。此外，大约4.6 Mg OC和182 kg HWEOC ha ^-1的相对较高的库存存储在ABL垃圾层中。ABL的0–3 cm土层的密度分级显示，总SOC的大部分（47％）存储在游离颗粒有机物部分中，是AC的两倍以上。同时，在ABL处被阻塞的颗粒有机物组分中储存了更高且稳定增加的SOC，这表明SOC稳定效率很高。总体而言，我们的研究结果支持刺槐树适合增加再生采矿基质的土壤肥力，因此，SRACS在边缘地区作为有效的复垦措施的潜力很大。