硝化抑制剂和生物炭对菜地土壤N_2O与CO_2排放的影响

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英文篇名：Effects of Nitrification Inhibitor and Biochar on N_2O and CO_2 Emissions from Vegetable Soil 作者：马智勇 ; 贾俊香 ; 谢英荷 ; 李廷亮 ; 白春雨 英文作者：MA Zhiyong;JIA Junxiang;XIE Yinghe;LI Tingliang;BAI Chunyu;National Experimental Teaching Demonstration Center,College of Resources and Environment,Shanxi Agricultural University; 关键词：N2O ; 硝化抑制剂 ; 生物炭 ; 温室气体 英文关键词：N2O;;nitrification inhibitor;;biochar;;greenhouse gases 中文刊名：山西农业科学 英文刊名：Journal of Shanxi Agricultural Sciences 机构：山西农业大学资源环境学院国家级实验教学示范中心; 出版日期：2019-06-18 出版单位：山西农业科学 年：2019 期：06 基金：山西省自然科学基金项目(201701D121118) 语种：中文; 页：97-100+133 页数：5 CN：14-1113/S ISSN：1002-2481 分类号：S63;S154.1

摘要

为探究硝化抑制剂双氰胺和生物炭对菜地土壤N_2O和CO_2排放的影响,采用室内静态培养的方式测定相同氮肥用量下菜地土壤添加双氰胺和生物炭后N_2O和CO_2的排放通量和累积排放量。结果表明,氮肥处理的N_2O累积排放量较控制处理(CK)提高了14倍,达1 192.03 ng/m~2;双氰胺和生物炭处理的N_2O累积排放量分别为100.15,387.79 ng/m~2,较氮肥处理分别降低了91.6%和67.5%。硝化抑制剂对CO_2也有减排作用,其CO_2累积排放量为238.47μg/m~2,较氮肥处理降低56.4%;而生物炭处理的CO_2累积排放量较氮肥处理增加了46.2%。综上所述,氮肥的施用显著提高了土壤N_2O和CO_2的排放通量和累积排放量;双氰胺可有效降低因氮肥施用导致的土壤N_2O和CO_2的排放;生物炭对N_2O排放有一定的减排作用,但会促进土壤CO_2的排放。
        To explore the effects of dicyandiamide nitrification inhibitors(DCD)and biocharon on N_2O and CO_2 emission from vegetable fields soils, N_2O and CO_2 emission fluxes and cumulative emissions from vegetable soils were measured by static incubation in laboratory under the same nitrogen fertilizer application rate. The results showed that the cumulative N_2O emission of nitrogen fertilizer treatment increased 14 times compared with the control treatment, reaching 1 192.03 ng/m~2. The cumulative emissions of nitrification inhibitors and biochar were 100.15, 387.79 ng/m~2, respectively, which were 91.6% and 67.5% lower than nitrogen fertilizer treatment. At the same time, nitrification inhibitors could also reduce CO_2 emissions. The cumulative CO_2 emission of nitrification inhibitors treatment was 238.47 μg/m~2, which was 56.4% lower than that of nitrogen fertilizer treatment. Biochar treatment increased soil CO_2 emissions46.2% than nitrogen fertilizer treatment. In conclusion, the application of nitrogen fertilizer in vegetable soil can significantly increase the N_2O and CO_2 emission fluxes and cumulative emission. DCD can effectively reduce soil N_2O and CO_2 emissions caused by nitrogen fertilizer application. Biochar can reduce N_2O emission caused by nitrogen fertilizer application, but it can promote soil CO_2 emission, and its comprehensive emission reduction ability still needs further study.

引文

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