Sugarcane bagasse, vinasse and a mixture of sugarcane bagasse and vinasse were hydrothermally carbonized (HTC), with and without the addition of phosphoric acid, in order to propose new applications of sucroenergetic industry by-products on soil. Detailed information on the composition and properties of hydrochars has been obtained through elemental composition, thermogravimetric analysis, nuclear magnetic resonance and, thermochemolysis GC-MS. The soluble acidic fraction from the hydrochar samples were applied to maize seeds to evaluate the agronomic potential as biostimulants and relate the molecular features with maize seed germination. The HTC treatment converted polysaccharide-based biomasses into hydrochars with hydrophobic characteristics (C-Aryl and C-Akyl). Furthermore, the addition of phosphoric acid further increased the overall hydrophobicity and shifted the thermal degradation of the hydrochars to higher temperatures. Biomass influenced the hydrochars that formed, in which the molecular features of sugarcane bagasse determined the formation of more polar hydrochar, due to the preservation of lignin and phenolic components. Meanwhile, the HTC of vinasse resulted in a more hydrophobic product with an enrichment of condensed and recalcitrant organic fractions. The germination assay showed that polar structures of bagasse may play a role in improving the maize seeds germination rate (increase of ~11%), while the hydrophobic domains showed negative effects. The responses obtained in germination seems to be related to the molecular characteristics that organic extracts can present in solution.

在有或没有添加磷酸的情况下，对甘蔗渣，酒糟以及甘蔗渣和酒糟的混合物进行水热碳化（HTC），以提出糖能工业副产物在土壤中的新应用。已通过元素组成，热重分析，核磁共振和热化学气相色谱-质谱仪获得了有关炭的组成和性质的详细信息。将来自水炭样品的可溶性酸性级分应用于玉米种子，以评估其作为生物刺激剂的农艺潜力，并将分子特征与玉米种子发芽相关联。HTC处理将基于多糖的生物质转化为具有疏水特性的碳氢化合物（C-芳基和C-烷基）。此外，磷酸的加入进一步增加了整体疏水性，并将烃类的热降解转移至更高的温度。生物质影响所形成的水炭，其中由于保留了木质素和酚类成分，甘蔗渣的分子特征决定了极性更大的水炭的形成。同时，酒糟的HTC产生了更疏水的产物，其中富含冷凝的和难降解的有机馏分。发芽试验表明，甘蔗渣的极性结构可能在提高玉米种子发芽率（增加约11％）中起作用，而疏水域则显示出负面影响。发芽过程中获得的响应似乎与有机提取物可以存在于溶液中的分子特性有关。