| 刘丽君,朱启林,李凯凯,李淼,孟磊,伍延正,汤水荣,何秋香.添加生物炭对海南燥红壤N2O和CO2排放的影响[J].农业环境科学学报,2021,40(9):2049-2056. |
| 添加生物炭对海南燥红壤N2O和CO2排放的影响 |
| Effects of biochar addition on N2O and CO2 emissions in Hainan dry red soil |
| 投稿时间：2021-02-17 |
| DOI：10.11654/jaes.2021-0187 |
| 中文关键词: 燥红壤 生物炭 土壤N2O排放 土壤CO2排放 |
| 英文关键词: dry red soil biochar soil N2O emission soil CO2 emission |
| 基金项目:国家自然科学基金项目（42067008，41701267）；海南省自然科学基金高层次人才项目（320RC493） |
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| 中文摘要: |
| 为探讨海南燥红壤N2O和CO2排放对生物炭添加的响应，通过室内培养试验分析生物炭加入后对土壤化学性质、NH4+-N和NO3--N含量以及N2O和CO2排放通量及累积排放量的影响。试验设置CK（不施生物炭）、B1（2%生物炭）、B2（4%生物炭）、B3（6%生物炭） 4个处理。结果表明：添加生物炭后，土壤有机质、全氮和速效钾含量显著提高，较CK增幅分别为67.4%~246.6%、38.6%~90.9%和696.0%~1 764.7%。相比于CK，不同为探讨海南燥红壤N2O和CO2排放对生物炭添加的响应，通过室内培养试验分析生物炭加入后对土壤化学性质、NH4+-N和NO3--N含量以及N2O和CO2排放通量及累积排放量的影响。试验设置CK（不施生物炭）、B1（2%生物炭）、B2（4%生物炭）、B3（6%生物炭） 4个处理。结果表明：添加生物炭后，土壤有机质、全氮和速效钾含量显著提高，较CK增幅分别为67.4%~246.6%、38.6%~90.9%和696.0%~1 764.7%。相比于CK，不同量生物炭添加后均导致了NH4+-N和NO3--N含量降低，总体上，不同处理NH4+-N浓度表现为CK>B3>B2>B1，NO3--N含量表现为CK>B1>B2>B3；随培养时间增加，各处理NH4+-N浓度呈下降趋势，NO3--N含量呈上升趋势。生物炭施用延后了N2O排放通量出现峰值的时间。各处理之间N2O和CO2排放通量的变化过程大致表现出一致的趋势，即随培养时间延长，N2O排放通量先升高后降低，CO2排放通量先升高后趋于稳定。和CK相比，生物炭添加不同程度地促进了N2O和CO2排放，B1、B2和B3处理下N2O累积排放量分别增加了399.2%、494.2%和194.5%，CO2排放总量分别增加了87.6%、153.3%和147.6%。本研究结果显示，生物炭施用短期内促进了土壤N2O和CO2的排放通量。 |
| 英文摘要: |
| To investigate the response of N2O and CO2 emissions to biochar addition in dry red soil in Hainan, the effects of biochar addition on soil chemical properties, ammonium nitrogen and nitrate content, N2O and CO2 emission fluxes, and cumulative emissions were analyzed through laboratory incubation experiments. Four treatments were set up:CK(no biochar), B1(2% biochar), B2(4% biochar), and B3(6% biochar). The results showed that the content of soil organic matter, total nitrogen, and available potassium increased significantly by 67.4%~246.6%, 38.6%~90.9%, and 696.0%~1 764.7%, respectively, compared with CK,and the content of NH4+-N and NO3--N decreased after the addition of biochar. In general, the concentration of NH4+-N in the different treatments was CK>B3>B2>B1, and the content of NO3--N was CK>B1>B2>B3. With the extension of incubation time, the concentration of NH4+-N in each treatment decreased, while the concentration of NO3--N increased. Biochar application delayed the peak N2O emission flux. Variations in N2O and CO2 emission fluxes among different treatments showed a consistent trend; that was, with the extension of incubation time, N2O and CO2 emission fluxes first increased and then decreased, and then increased again with the extension of incubation time. Compared with CK, the addition of biochar promoted N2O and CO2 emissions to some degree, the cumulative N2O emissions increased by 399.2%, 494.2%, and 194.5% under treatments B1, B2, and B3, respectively, and the total CO2 emissions increased by 87.6%, 153.3%, and 147.6%, respectively. The results show that biochar application increase N2O and CO2 emissions in the short term. |
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