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首页> 外文期刊>The Science of the Total Environment >Pine sawdust biochar reduces GHG emission by decreasing microbial and enzyme activities in forest and grassland soils in a laboratory experiment
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Pine sawdust biochar reduces GHG emission by decreasing microbial and enzyme activities in forest and grassland soils in a laboratory experiment

机译：松木屑生物炭通过减少森林和草地土壤中的微生物和酶活性来减少温室气体排放

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摘要

This study investigated the effects of biochar soil amendment on greenhouse gas (GHG) emissions in soils. Pine (Pinus koraiensisSiebold & Zucc.) sawdust biochar was produced at 300 and 550°C with and without steam activation (coded as BC300-S, BC550-S, BC300 and BC550, respectively). They were applied to forest and grassland soils at 1.5% (w/w) rate in a 100-day laboratory incubation experiment. Application of BC550 significantly reduced cumulative CO2emission from the forest soil by 16.4% relative to the control (without biochar application), but not from the grassland soil. Biochar application did not have significant effects on CH4uptake from either soil. Application of BC550 and BC550-S reduced the cumulative N2O emission by 27.5 and 31.5%, respectively, in the forest soil and 14.8 and 11.7%, respectively, in the grassland soil, as compared to the control. The effects of BC300 and BC300-S on cumulative CO2and N2O emission was not significant in both soils, except for the significant reduction in cumulative N2O emission from the forest soil by BC300-S. The effect of BC550 and BC550-S on N2O emission persisted until the end of the 100-day incubation indicating possible long-term effects of these biochars. We conclude that BC550 and BC550-S had the highest potential to reduce CO2and N2O emission in the 100-day laboratory incubation experiment. These biochars should be tested in long-term field trials to confirm their potential for mitigating CO2and N2O fluxes in real ecosystems with a relevant time frame.
机译：这项研究调查了生物炭土壤改良剂对土壤中温室气体（GHG）排放的影响。松木（Pinus koraiensisSiebold＆Zucc。）的木屑生物炭是在300和550°C的温度下进行的，有和没有进行蒸汽活化（分别编码为BC300-S，BC550-S，BC300和BC550）。在100天的实验室温育实验中，将它们以1.5％（w / w）的比例施用于森林和草原土壤。相对于对照（未施用生物炭），施用BC550可使森林土壤的累积CO2排放量降低16.4％，但不降低草原土壤的累积CO2排放量。施用生物炭对从任何一种土壤吸收CH4均无明显影响。与对照相比，BC550和BC550-S的施用分别使森林土壤中的累积N2O排放量减少了27.5％，草地土壤中的累积N2O排放量减少了31.5％，草原土壤中的N2O排放量减少了11.7％。 BC300和BC300-S对累积的CO2和N2O排放的影响在两种土壤中均不显着，除了BC300-S从森林土壤中累积的N2O排放显着减少。 BC550和BC550-S对N2O排放的影响一直持续到100天培养结束时为止，表明这些生物炭可能具有长期影响。我们得出结论，在100天的实验室培养实验中，BC550和BC550-S具有最大的减少CO2和N2O排放的潜力。这些生物炭应在长期的田间试验中进行测试，以确认其在相关时间范围内缓解实际生态系统中的CO2和N2O通量的潜力。

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