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蔗渣生物质炭对喀斯特农田石灰性土壤氮转化过程的短期影响

赖倩倩 杨 霖 秦兴华 田 伟 伍延正 汤水荣 解 钰 Christoph Müller 孟 磊

赖倩倩, 杨 霖, 秦兴华, 田 伟, 伍延正, 汤水荣, 解 钰, Christoph Müller, 孟 磊. 蔗渣生物质炭对喀斯特农田石灰性土壤氮转化过程的短期影响[J]. 中国岩溶, 2019, 38(3): 450-457.
引用本文: 赖倩倩, 杨 霖, 秦兴华, 田 伟, 伍延正, 汤水荣, 解 钰, Christoph Müller, 孟 磊. 蔗渣生物质炭对喀斯特农田石灰性土壤氮转化过程的短期影响[J]. 中国岩溶, 2019, 38(3): 450-457.
LAI Qianqian, YANG Lin, QIN Xinghua, TIAN Wei, WU Yanzheng, TANG Shuirong, XIE Yu, Christoph Müller, MENG Lei. Study on short-term effects of sugarcane biochar on nitrogen transformation in calcareous soils in karst farmland[J]. CARSOLOGICA SINICA, 2019, 38(3): 450-457.
Citation: LAI Qianqian, YANG Lin, QIN Xinghua, TIAN Wei, WU Yanzheng, TANG Shuirong, XIE Yu, Christoph Müller, MENG Lei. Study on short-term effects of sugarcane biochar on nitrogen transformation in calcareous soils in karst farmland[J]. CARSOLOGICA SINICA, 2019, 38(3): 450-457.

蔗渣生物质炭对喀斯特农田石灰性土壤氮转化过程的短期影响

基金项目: 海南省自然科学基金(317070);海南省重大科技专项(ZDKJ2017002);国家自然科学基金(41661051)

Study on short-term effects of sugarcane biochar on nitrogen transformation in calcareous soils in karst farmland

  • 摘要: 生物质炭对于土壤中不同形态氮库的含量影响已有较多研究,但对西南喀斯特区石灰性土壤氮素形态,尤其是控制氮素形态的转化过程研究较为缺乏。本研究设置土壤中添加1%(C1)和3%(C2)蔗渣生物质炭2个用量水平,并以不施用蔗渣生物质炭作为对照(CK),共3个处理,通过15NH4NO3和NH415NO3成对标记技术,结合MCMC氮素转化模型研究了不同用量的蔗渣生物质炭对石灰性土壤氮转化过程的短期影响,为该地区蔗渣资源化利用和土壤氮保持提供理论支撑。结果表明,与CK相比,添加蔗渣生物质炭能够快速提高土壤pH和有机碳含量。添加生物质炭并没有显著改变土壤氮的矿化、铵态氮(NH+4氮(NO-3物同化和异养硝化速率,但NH+4随生物质炭用量的增加而提高,以添加量最高的C2处理最大。添加生物质炭同样提高了土壤NH+4速率,但C1和C2处理的土壤NH+4放速率并无显著性差异。与CK和C1处理相比,施用高量蔗渣生物质炭通过抑制自养硝化速率而显著降低了硝态氮净产生速率。这些结果表明,施用高量蔗渣生物质炭于石灰性土壤中可快速实现对NH+4,降低自养硝化速率,减少NO-3,从而降低了其损耗和淋失风险。

     

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  • 刊出日期:  2019-06-25

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