生物质炭施用对土壤呼吸、土壤有机碳及微生物量碳影响的整合分析
发布时间：2019-05-18 20:35
【摘要】：由生物质热裂解制成的富含碳元素的副产物生物质炭,被提倡为丰富土壤碳库的潜在战略。本文收集了共50篇文献、395组成对观测数据,并采用Meta分析的方法研究了生物质炭的施用对土壤呼吸、土壤有机碳及微生物量碳的影响。研究结果表明,生物质炭的施用对土壤CO2排放通量无显著影响,但能显著提高土壤有机碳和微生物生物量碳含量的40%和18%。对于土壤CO2排放通量的积极响应只体现在田间试验、培养实验以及未被翻耕和种植的土壤中;而在有植株参与以及施加氮肥的土壤中施加生物质炭时能明显地增加土壤微生物量碳的含量;另外,对于不同土地利用类型的稻田而言,土壤有机碳含量的增加最为明显。复合氮肥和堆肥的共同施用条件下,土壤CO2排放通量和土壤微生物量碳含量会急剧增加。土壤CO2的排放通量和土壤微生物量碳含量是随着生物质炭的施用量、热裂解温度以及C/N比的增加而递减的;反之,土壤有机碳含量随之递增。对于不同生物质炭的原料来源,粪便和作物秸秆对其影响最大。土壤CO2排放通量随着生物质炭的pH值的增加而递减,当pH值在8.1～9.0范围之内时,土壤有机碳和土壤微生物量碳含量最高。因此,要评估生物质炭的减缓气候变化潜力,应当考虑土壤的理化性质、土地利用类型、农业操作规范以及生物质炭的特性。
[Abstract]:Biomass carbon, a by-product rich in carbon, made from biomass pyrolysis, is advocated as a potential strategy to enrich soil carbon pool. In this paper, 50 literatures and 395 component pairs were collected, and the effects of biomass carbon application on soil respiration, soil organic carbon and microbial biomass carbon were studied by Meta analysis. The results showed that the application of biomass carbon had no significant effect on soil CO2 emission flux, but it could significantly increase the content of soil organic carbon and microbial biomass carbon by 40% and 18%. The positive response to soil CO2 emission flux was only reflected in field experiments, culture experiments and soils that had not been ploughed and planted. In addition, the content of soil microbial biomass carbon increased obviously when biomass carbon was applied in soils with plant participation and nitrogen fertilizer, and the increase of soil organic carbon content was the most obvious in different land use types of paddy fields. Under the condition of combined application of compound nitrogen fertilizer and compost, soil CO2 emission flux and soil microbial biomass carbon content increased sharply. The emission flux of soil CO2 and the content of soil microbial biomass carbon decreased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio, on the contrary, the content of soil organic carbon increased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio. For the raw material sources of different biomass carbon, feces and crop straw have the greatest influence on it. Soil CO2 emission flux decreased with the increase of pH value of biomass carbon. When pH value was within 8.1 鈮，
本文编号：2480315
[Abstract]:Biomass carbon, a by-product rich in carbon, made from biomass pyrolysis, is advocated as a potential strategy to enrich soil carbon pool. In this paper, 50 literatures and 395 component pairs were collected, and the effects of biomass carbon application on soil respiration, soil organic carbon and microbial biomass carbon were studied by Meta analysis. The results showed that the application of biomass carbon had no significant effect on soil CO2 emission flux, but it could significantly increase the content of soil organic carbon and microbial biomass carbon by 40% and 18%. The positive response to soil CO2 emission flux was only reflected in field experiments, culture experiments and soils that had not been ploughed and planted. In addition, the content of soil microbial biomass carbon increased obviously when biomass carbon was applied in soils with plant participation and nitrogen fertilizer, and the increase of soil organic carbon content was the most obvious in different land use types of paddy fields. Under the condition of combined application of compound nitrogen fertilizer and compost, soil CO2 emission flux and soil microbial biomass carbon content increased sharply. The emission flux of soil CO2 and the content of soil microbial biomass carbon decreased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio, on the contrary, the content of soil organic carbon increased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio. For the raw material sources of different biomass carbon, feces and crop straw have the greatest influence on it. Soil CO2 emission flux decreased with the increase of pH value of biomass carbon. When pH value was within 8.1 鈮，
本文编号：2480315
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