铁炉渣施加对稻田不同途径氧化亚氮通量的影响

Effect of Iron Slag Adding on Nitrous Oxide Fluxes of Different Pathways in Paddy Fields

为了阐明铁炉渣施加对稻田不同途径氧化亚氮通量的影响,采用静态箱-气相色谱法对对照、2、4、8 Mg/hm^2铁炉渣施加后稻田不同途径氧化亚氮通量进行了测定与分析.研究结果表明：观测期内,对照、2、4、8 Mg/hm^2铁炉渣施加后植物体传输氧化亚氮通量为-0.020 4～0.033 4、-0.038 9～0.052 3、-0.062 3 ～0.094 4、-0.035 1～0.080 2 mg/（m^2·h）,平均值分别为0.005 9、-0.013 9、0.017 7、-0.000 1 mg/（m^2·h）.扩散传输为-0.032 3～ 0.069 9、-0.015 5～0.037 2、-0.023 1～0.067 1、-0.035 2～0.032 4,平均值分别为0.020 6、-0.003 1、0.005 3、-0.001 6 mg/（m^2·h）.气泡传输为-0.073 6～ 0.033 4、-0.025 7～0.084 2、-0.045 6～0.068 9、-0.080 1～0.0802 mg/（m^2·h）,平均值分别为-0.014 7、0.000 2、0.012 5、-0.011 7 mg/（m^2·h）.铁炉渣的施加对不同途径氧化亚氮通量的影响并不一致.

Global warming is a critical issue today.The increment of greenhouse gas emission is important cause for the change,nitrous oxide is one of the main greenhouse gas.It is necessary to carry out research on its emission characteristics and reduction methods.In order to clarify the effect of iron slag adding on nitrous oxide fluxes of different pathways in paddy field,the nitrous oxide fluxes of different pathways of control,2,4,and 8 mg/hm^2 iron slag application were determined by static chamber gas chromatogram.The results showed：plant pathway nitrous oxide fluxes were-0.0204～0.0334,-0.0389～0.0523,-0.0623～0.0944,-0.035 1～0.0802 mg/（m^2 · h）,and the averaged values were 0.005 9,-0.013 9,0.017 7,-0.000 1 mg/（m^2 · h）.Diffusion pathway nitrous fluxes were -0.0323～0.069 9,-0.015 5 ～0.037 2,-0.023 1 ～0.067 1,-0.035 2 ～0.032 4 mg/（m^2 · h）,and the averaged values were 0.020 6,-0.003 1,0.005 3,-0.001 6 mg/（m^2 · h）.Bubble pathway nitrous oxide fluxes were-0.073 6～0.0334,-0.0257～0.0842,-0.0456～0.0689,-0.080 1 ～0.0802mg/（m^2 · h）,and the averaged values were-0.0147,0.0002,0.012 5,-0.011 7 mg/（m^2 · h）.The effects of iron slag addition on nitrous oxide fluxes of different pathways were different in the same patterns.