This study aimed to determine the physicochemical properties and production energy of biochars obtained from tomato harvest waste as a function of temperature and duration (holding time), and the influence of biochars on soil CO₂ emission in the field condition. Pyrolysis was conducted in a 50 L-reactor with an electrical heating system. With a rise in pyrolysis temperature and holding time, pH, carbon, ash and fixed carbon contents, and energy consumption per unit mass of biochar increased, while volatiles content, and biochar yield decreased. The nitrogen content of biochars decreased with the increased holding time under the same temperature. Soil CO₂ emission rose and declined with biochars produced at low and high temperatures, respectively, when mixed with the soil. The difference between the lowest (at 500 °C with the holding times of 240 min) and highest biochars-related soil CO₂ emissions (at 300 °C with the holding times of 40 min) was 38.6 %. The pyrolysis temperature of 500 °C regardless of holding time appeared to reduce the energy consumption due to the biochar production, and soil respiration.

这项研究旨在确定从番茄收获废物中获得的生物炭的理化性质和生产能量随温度和持续时间（保持时间）的变化，以及在田间条件下生物炭对土壤CO ₂排放的影响。在带有电加热系统的50 L反应器中进行热解。随着热解温度和保持时间的增加，pH，碳，灰分和固定碳含量以及每单位质量生物炭的能量消耗增加，而挥发物含量和生物炭产率降低。在相同温度下，生物炭的氮含量随保持时间的增加而降低。土壤CO ₂当与土壤混合时，在低温和高温下产生的生物炭分别导致排放量的上升和下降。最低（在500°C，保持时间为240分钟）与最高生物炭相关的土壤CO ₂排放量（在300°C，保持时间为40分钟）之间的差异为38.6％。无论保持时间如何，500℃的热解温度似乎都会减少由于生物炭生产和土壤呼吸而产生的能量消耗。