A field experiment was performed to investigate the effect of application of biochar based fertilizer (0, 10, 20, 30 t·hm-2) on soil N2O,CO2 emissions in 2015 and 2016.It was shown that compared with CK, CO2-C emissions were increased in 2015 and 2016 by 0.81%-23.05% and 11.66%-30.94%, respectively, while, N2O emissions were decreased by 13.32%-16.59% and 7.90%-19.57% in 2015 and 2016, respectively.Based on the results, although application of biochar based fertilizer increased soil CO2 emission, it could effectively reduce soil N2O emission, and decrease global warming potential (GWP) and greenhouse gas intensity (GHGI).Moreover, the effects of 30·t·hm-2 application rate were sustainable between years.%通过大田试验,研究分析不同梯度用量生物质炭基肥(0、10、20、30 t·hm-2)对旱作农田土壤温室气体排放的影响.结果表明,与对照(CK)相比,施用生物质炭基肥土壤的CO2-C排放量在2015年和2016年分别提高了0.81%~23.05%和11.66%~30.94%;土壤N2O的排放总量分别降低了13.32%~16.59%和7.90%~19.57%.综合连续2 a试验结果,本研究中生物质炭基肥施用增加了土壤CO2排放,但对于降低土壤N2O排放、全球增温潜势(GWP)、温室气体排放强度(GHGI)具有显著和持续效应,且在高用量下(30 t·hm-2)的持续效应具有年际间稳定性.
展开▼
