| 炉渣与生物炭施加对福州平原水稻田温室气体排放的后续影响 |
| 摘要点击 1508 全文点击 572 投稿时间：2019-06-29 修订日期：2019-07-22 |
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| 中文关键词 炉渣 生物炭 温室气体 水稻田 福州平原 |
| 英文关键词 slag biochar greenhouse gases paddy fields Fuzhou Plain |
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| 中文摘要 |
| 为了探讨炉渣与生物炭施加对稻田温室气体的排放是否具有后续效应，于2015年早、晚稻秧苗移栽前对稻田进行施加生物炭（B）、炉渣（S）和生物炭+炉渣（混施）处理（BS），以不施加处理作为对照（CK）.2 a后（2017年）在早、晚稻生长期，分别测定了不同试验组稻田温室气体CO2、CH4和N2O的排放通量.结果表明，在水稻生长期，对照、生物炭、炉渣和混施处理CO2的平均排放通量分别为（1723.66±194.56）、（1245.52±155.05）、（1140.29±79.68）和（1055.83±62.13）mg·（m2·h）-1，生物炭、炉渣和混施这3种施加处理CO2的排放通量均比对照组有显著降低（P<0.05），降低比例分别达27.74%、33.84%和38.75%.CH4的平均排放通量为（0.45±0.03）、（0.40±0.05）、（0.36±0.10）和（0.25±0.04）mg·（m2·h）-1，各处理组与对照相比均降低了CH4的排放通量，降低比例分别为11.11%、20.00%和44.44%，但未到达显著差异（P>0.05）.N2O在不同处理组的平均排放通量为（62.47±27.00）、（115.09±30.94）、（79.75±24.98）和（112.68±23.59）μg·（m2·h）-1.与对照相比，各处理组均增加了N2O的排放通量，升高比例分别达84.23%、27.66%和80.37%.全球综合增温潜势表明，施加处理增加了早、晚稻稻田生态系统的综合增温潜势.说明，炉渣和生物炭施加处理2 a之后，对减排作用效果不明显. |
| 英文摘要 |
| We investigate whether slag and biochar applications have subsequent effects on greenhouse gas emissions from paddy fields by applying biochar (B), slag (S), and a biochar-slag mix (BS) to paddy fields in the Fuzhou Plain, China. Applications of the three treatments along with a control (CK) of no amendment were made in 2015 before early and late rice seedlings were transplanted. Two years later in 2017, the CO2, CH4, and N2O emissions in the different treatments and control were measured in the early and late rice growing seasons. The results showed that, in the rice growing season, the averaged CO2 emission in the control, biochar, slag, and mixed applications were (1723.66±194.56), (1245.52±155.05), (1140.29±79.68), and (1055.83±62.13) mg·(m2·h)-1, respectively. The CO2 emissions from the three treatments were significantly lower than the control group (P<0.05), and the reduction ratios of each treatment to the control were 27.74%, 33.84%, and 38.75%, respectively. The averaged CH4 emissions in the control, biochar, slag, and mixed applications were (0.45±0.03), (0.40±0.05), (0.36±0.10), and (0.25±0.04) mg·(m2·h)-1, respectively, which were lower, but not significantly so (P>0.05), than the control. The ratios of CH4 emissions from each treatment to the control were 11.11%, 20.00%, and 44.44%, respectively. The averaged N2O emissions from the control, biochar, slag, and mixed applications were (62.47±27.00), (115.09±30.94), (79.75±24.98), and (112.68±23.59) μg·(m2·h)-1, respectively. In comparison to the control, the biochar, slag, and mixed treatments increased the N2O emissions by 84.23%, 27.66%, and 80.37%, respectively. The global comprehensive warming potential indicated that the application treatments increased the comprehensive warming potential of the early and late rice paddy ecosystems; after 2 years of applying slag and biochar treatments, their effect on the emission reductions were not obvious. |
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