铁炉渣对稻田土壤甲烷传输释放的影响研究

摘要

In order to clarify the effect of iron slag adding on paddy field methane transportation and release ,2 , 4 ,and 8 Mg/hm2 iron slag applications were determined by static chamber-gas chromatogram .The results show that methane concentrations in pore water are 0.29 ,0.21 ,0.16 ,0.23 μmol/L ,respectively .Bubble transportations and release methane are 0.63 , 0.21 , 0.16 , and 0.17 Mg/hm2 , respectively . Diffusion transportation and release methane are 0 .07 ,0 .12 ,0 .07 ,and 0 .09 Mg/hm2 .Plant transportation and release methane are 3 .47 , 2 .89 , 2 .27 , and 1 .87 M g/hm2 , respectively . Iron slag can decrease the methane concentration in pore water ,bubble and plant transportation and release methane .%为了阐明铁炉渣对稻田甲烷传输释放的影响，采用静态箱-气相色谱法，对对照样地和施加2、4、8 M g/hm2铁炉渣后稻田的甲烷传输释放进行了测定与分析。研究结果表明：观测期内，对照样地和2、4、8 M g/hm2铁炉渣施加稻田孔隙水甲烷浓度平均值分别为0．29、0．21、0．16、0．23μmol/L ，气泡传输释放甲烷平均值分别为0．63、0.21、0．16、0．17 M g/hm2，扩散传输释放甲烷平均值分别为0．07、0．12、0．07、0．09 M g/hm2，植物体传输释放甲烷平均值为3．47、2．89、2．27、1．87 M g/hm2。铁炉渣的施加降低了土壤孔隙水甲烷浓度、气泡传输和植物体传输释放甲烷量。