The Pyrolysis-Biochar-Bioenergy Platform (PBBP) has the potential to be developed into a new economically-viable industry that helps mitigate climate change. However, the harvesting of crop residues for bioenergy production inherently removes plant nutrients from soils and expropriates organic residues that are needed to build new soil organic matter. Here we consider whether the biochar co-product of PBBP is effective for making the harvesting of crop residues sustainable. A Minnesota agricultural field lost 7 Mg of C per hectare as a legacy of 19 years of crop residue harvesting. Residue harvesting also adversely impacted other measured soil quality parameters. Data compiled from nine studies, indicate that biochar amendments improved numerous soil quality parameters, including soil organic C, total N, bulk density, pH, CEC, aggregation, porosity, soil water retention, available K, and available P. The analysis indicates that 6 to 11 Mg of biochar C could be produced from maize residue harvested from one hectare of land for 19 years, which is enough to fully compensate for the loss of SOC and the degradation of soil quality on the Minnesota field. However, biochars need to be prepared at peak pyrolysis temperatures of 500 °C or higher to be stable and biochar amendments need to be combined with other soil conservation practices to allow sustainable harvesting of crop residues for the production bioenergy.

热解-生物炭-生物能源平台（PBBP）有潜力发展成为一个经济上可行的新产业，有助于缓解气候变化。然而，收获农作物残留物用于生产生物能源本质上会从土壤中去除植物养分，并征用构建新土壤有机质所需的有机残留物。在这里，我们考虑 PBBP 的生物炭副产品是否能够有效地实现农作物残留物的可持续收获。明尼苏达州的一片农田每公顷损失了 7 毫克碳，这是 19 年作物残茬收获的遗留问题。残留物收获也对其他测量的土壤质量参数产生不利影响。九项研究汇编的数据表明，生物炭改良剂改善了许多土壤质量参数，包括土壤有机碳、总氮、容重、pH、CEC、聚集、分析表明，1公顷土地收获的玉米残渣19年可生产6～11毫克生物炭C，足以完全补偿生物炭C的损失。明尼苏达田地的 SOC 和土壤质量退化。然而，生物炭需要在 500°C 或更高的峰值热解温度下制备才能稳定，并且生物炭改良剂需要与其他土壤保持实践相结合，以便可持续收获作物残留物以生产生物能源。这足以完全补偿明尼苏达田地 SOC 的损失和土壤质量的退化。然而，生物炭需要在 500°C 或更高的峰值热解温度下制备才能稳定，并且生物炭改良剂需要与其他土壤保持实践相结合，以便可持续收获作物残留物以生产生物能源。这足以完全补偿明尼苏达田地 SOC 的损失和土壤质量的退化。然而，生物炭需要在 500°C 或更高的峰值热解温度下制备才能稳定，并且生物炭改良剂需要与其他土壤保持实践相结合，以便可持续收获作物残留物以生产生物能源。