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slagbiochargreenhouse gasespaddy fieldsFuzhou Plain

作者	单位	E-mail
蓝兴福	福建师范大学生命科学学院, 福州 350108	lanxingfu3508@163.com
王晓彤	福建师范大学生命科学学院, 福州 350108
周雅心	福建师范大学生命科学学院, 福州 350108
金强	福建师范大学地理研究所, 福州 350007
许旭萍	福建师范大学生命科学学院, 福州 350108	xuping@fjnu.edu.cn
王维奇	福建师范大学地理研究所, 福州 350007 福建师范大学湿润亚热带生态地理过程教育部重点实验室, 福州 350007	wangweiqi15@163.com

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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