Driving practices of Amazon native inhabitants are an example of positive feedback in carbon storage acting as a key element in soil fertility and stability. The anthropogenic Amazonian Terra Preta do Índio (Indian Dark Earth) soils are rich in pyrogenic black carbon and the Rio Negro (Black River) also exhibits plentiful apparently similar black-carbon particles. In this context, we characterized the structural, morphological and elemental properties of the long-lived stable carbon-based structures present in sediments of the Amazonian Rio Negro and in two Terra Preta do Índio soils from two different geographic regions. Optical microscopy, Raman spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy techniques are utilized. The structural analysis displayed that these carbon structures exhibit similar nanocrystallite structures, despite their different geographic location and environment. The Terra Preta do Índio-carbons are however, more defective and the quantitative elemental analyzes indicate they have greater variety of nutrients, such as P and Ca, than Rio Negro sediment-carbons.

亚马逊土著居民的驾驶习惯是碳储存中积极反馈的一个例子，它是土壤肥力和稳定性的关键因素。人为的亚马逊河Terra Preta doÍndio（印度暗土）土壤富含热解黑碳，而Rio Negro（黑河）也表现出大量明显相似的黑碳颗粒。在这种情况下，我们表征了亚马逊河里约格罗河沉积物和两个Terra Preta doÍndio沉积物中存在的长寿命稳定碳基结构的结构，形态和元素特性。来自两个不同地理区域的土壤。利用了光学显微镜，拉曼光谱，扫描电子显微镜和能量色散X射线光谱技术。结构分析表明，尽管它们的地理位置和环境不同，但这些碳结构仍具有相似的纳米微晶结构。该特拉普雷塔做Indio的β-碳是然而，更多的缺陷和定量元素分析表明他们有更大的各种营养物质，如磷和钙，比里奥内格罗沉积物碳。