Inputs of organic materials are recommended to increase soil carbon (C) sequestration and crop growth. However, organic amendments may increase greenhouse gas (GHG) emissions. To comprehensively evaluate the effect of organic amendments on the net ecosystem C budget (NECB) and net global warming potential (net GWP) in a successive tobacco cultivation system, methane (CH₄) and nitrous oxide (N₂O) fluxes and main components of the NECB under different treatments were measured in a pot experiment. The experiment with cultivated tobacco plants included five treatments: no fertiliser (NF), NPK, NPK plus wheat straw, NPK plus sesame cake (NPKC) and NPK plus biochar made from tobacco stalks. The results of NECB and estimated SOC changes implied that the tobacco-cultivated ecosystems acted as a C source under the NF, NPK and NPKC treatments, whereas the systems acted as a C sink with the application of straw and biochar. N₂O emissions were significantly increased by 53.7% and 96.2% in soils amended with straw and sesame cake respectively. Biochar addition had no effect on N₂O emissions. CH₄ uptake was not affected by organic amendments. As a result, the application of straw and biochar significantly decreased the net GWP and GHG intensity, but sesame cake amendments had no such significant effects. Therefore, in comparison to the other treatments, the straw and biochar treatments were more effective GHG mitigation practices that increased the yield and NECB in the tobacco cultivation system, and this was especially true for the biochar treatment.

建议增加有机材料的投入，以增​​加土壤碳（C）的固存和作物的生长。但是，有机修正物可能会增加温室气体（GHG）的排放。为了全面评估有机增补剂对连续烟草种植系统中甲烷（CH ₄）和一氧化二氮（N ₂）的净生态系统碳预算（NECB）和全球净变暖潜能（净GWP）的影响O）在盆栽实验中测量了在不同处理下NECB的通量和主要成分。种植烟草植物的试验包括五种处理方法：不施肥（NF），NPK，NPK加麦秸，NPK加上芝麻饼（NPKC）和NPK加上由烟梗制成的生物炭。NECB和估计的SOC变化的结果表明，在NF，NPK和NPKC处理下，烟草种植的生态系统充当了C源，而在秸秆和生物炭的应用下，该系统充当了C汇。在用稻草和芝麻饼改良的土壤中，N ₂ O排放量分别显着增加了53.7％和96.2％。添加生物炭对N ₂ O排放没有影响。通道₄吸收不受有机修正的影响。结果，秸秆和生物炭的施用显着降低了净GWP和GHG强度，但是芝麻饼改良剂没有这种显着影响。因此，与其他处理相比，秸秆和生物炭处理是更有效的温室气体减排措施，可以增加烟草种植系统中的产量和NECB，对于生物炭处理尤为如此。