Tillage erosion causes substantial soil redistribution that can exceed water erosion especially in hummocky landscapes under highly mechanized large field agriculture. Consequently, truncated soil profiles can be found on hill shoulders and top slopes, whereas colluvial material is accumulated at footslopes, in depressions, and along downslope field borders. We tested the hypothesis that soil erosion substantially affects in-field patterns of the enhanced vegetation index (EVI) of different crop types on landscape scale. The interrelation between the EVI (RAPIDEYE satellite data; 5 m spatial resolution) as a proxy for crop biomass and modeled total soil erosion (tillage and water erosion modeled using SPEROS-C) was analyzed for the Quillow catchment (size: 196 km²) in Northeast Germany in a wet versus normal year for four crop types (winter wheat, maize, winter rapeseed, winter barley). Our findings clearly indicate that eroded areas had the lowest EVI values, while the highest EVI values were found in depositional areas. The differences in the EVI between erosional and depositional sites are more pronounced in the analyzed normal year. The net effect of total erosion on the EVI compared to areas without pronounced erosion or deposition ranged from −10.2% for maize in the normal year to +3.7% for winter barley in the wet year. Tillage erosion has been identified as an important driver of soil degradation affecting in-field crop biomass patterns in a hummocky ground moraine landscape. While soil erosion estimates are to be made, more attention should be given toward tillage erosion.

中文翻译：

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耕作侵蚀是密集使用的丘陵景观中田间生物量模式的重要驱动因素

耕作侵蚀会导致大量的土壤重新分配，这可能超过水侵蚀，尤其是在高度机械化的大田农业下的丘陵景观中。因此，可以在山肩和顶部斜坡上找到截断的土壤剖面，而崩积物则在脚坡、洼地和下坡田间边界堆积。我们检验了土壤侵蚀显着影响景观尺度上不同作物类型的增强植被指数 (EVI) 的田间模式的假设。分析了作为作物生物量代理的 EVI（RAPIDEYE 卫星数据；5 m 空间分辨率）与模拟的总土壤侵蚀（使用 SPEROS-C 模拟的耕作和水侵蚀）之间的相互关系，用于 Quillow 流域（大小：196 km ²) 在德国东北部，在潮湿年份与正常年份相比，四种作物类型（冬小麦、玉米、冬油菜籽、冬大麦）。我们的研究结果清楚地表明，侵蚀区域的 EVI 值最低，而沉积区域的 EVI 值最高。在分析的正常年份中，侵蚀和沉积地点之间的 EVI 差异更为明显。与没有明显侵蚀或沉积的地区相比，总侵蚀对 EVI 的净影响范围从正常年份的玉米的 -10.2% 到潮湿年份的冬季大麦的 +3.7%。耕作侵蚀已被确定为土壤退化的重要驱动因素，影响了丘陵地面冰碛景观中的田间作物生物量模式。在进行土壤侵蚀估算的同时，应更多地关注耕作侵蚀。