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Fate of nitrogen in overlying water with biochar addition to sediment in planted ditches†
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1039/c7em00445a Qianding Cheng 1, 2, 3, 4 , Hongguang Cheng 1, 2, 3, 4 , Lu Lu 3, 4, 5, 6 , Xiao Pu 3, 4, 7, 8 , Zhenzhen Wu 1, 2, 3, 4 , Haixu Sun 1, 2, 3, 4
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1039/c7em00445a Qianding Cheng 1, 2, 3, 4 , Hongguang Cheng 1, 2, 3, 4 , Lu Lu 3, 4, 5, 6 , Xiao Pu 3, 4, 7, 8 , Zhenzhen Wu 1, 2, 3, 4 , Haixu Sun 1, 2, 3, 4
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Best management practice (BMP) in drainage ditch systems is of high concern due to its importance in intercepting and removing pollution. Biochar has recently become an interesting option for agricultural pollution elimination, but knowledge is still limited on the fate of nitrogen (N) in drainage ditch systems with biochar added into the sediment. This isotope tracer study examined the effects of biochar addition into the sediment on the fate of inorganic N (15N–NO3− and 15N–NH4+) in sediment microcosms through a 93 day incubation experiment. Four types of sediment microcosm (sediment only, sediment + biochar, sediment + plant, sediment + biochar + plant) were set to investigate N migration and transformation using 15N pool dilution. The results indicated that 0.75% biochar addition significantly increased sediment pH and water holding capacity by 0.29 and 2.6%, respectively. Biochar addition suppressed sediment 15N–N2O emissions and decreased 15N uptake by Calamagrostis angustifolia. From the 15N distribution in different sediment layers, it was found that biochar may increase the risk of N leaching and speed up its downward mobility. Meanwhile, 15N fate was affected by the planting of Calamagrostis angustifolia, exhibiting reduced leakage and residue in sediment. Vegetated microcosms suppressed N2O emissions, as the Calamagrostis angustifolia effectively competed with microbes and utilized N for its own growth and development. Therefore, Calamagrostis angustifolia could be beneficial in the removal of agricultural non-point source nitrogen pollution as a potential option for BMP.
中文翻译：
覆盖沟渠中水中的氮的命运加上生物炭以及人工沟渠中的沉积物†
排水沟系统中的最佳管理实践（BMP）由于其在拦截和清除污染方面的重要性而备受关注。生物炭最近已成为消除农业污染的一个有趣的选择，但是对于将生物炭添加到沉积物中的排水沟系统中氮（N）的命运仍然知之甚少。这项同位素示踪研究研究了向沉积物中添加生物炭对无机N（15 N–NO 3 −和15 N–NH 4 +）在93天的温育实验中进入沉积物微观世界。设置了四种类型的沉积物微观世界（仅沉积物，沉积物+生物炭，沉积物+植物，沉积物+生物炭+植物）以研究使用15 N池稀释的N迁移和转化。结果表明，添加0.75％的生物炭显着提高了沉淀物的pH和持水量，分别为0.29和2.6％。添加生物碳可抑制沉积物15 N–N 2 O的排放，并减少Calamagrostis angustifolia对15 N的吸收。从不同沉积物层中的15 N分布，发现生物炭可能会增加N浸出的风险并加快其向下迁移的速度。同时，15 N的命运受到Calamagrostis angustifolia种植的影响，减少了渗漏和残留物中的残留物。植被小生境抑制了N 2 O的排放，因为Calamagrostis angustifolia有效地与微生物竞争，并利用N自身的生长和发育。因此， Calamagrostis angustifolia作为去除BMP的潜在选择，可能有利于消除农业面源氮污染。
更新日期：2017-12-20
中文翻译：
覆盖沟渠中水中的氮的命运加上生物炭以及人工沟渠中的沉积物†
排水沟系统中的最佳管理实践（BMP）由于其在拦截和清除污染方面的重要性而备受关注。生物炭最近已成为消除农业污染的一个有趣的选择，但是对于将生物炭添加到沉积物中的排水沟系统中氮（N）的命运仍然知之甚少。这项同位素示踪研究研究了向沉积物中添加生物炭对无机N（15 N–NO 3 −和15 N–NH 4 +）在93天的温育实验中进入沉积物微观世界。设置了四种类型的沉积物微观世界（仅沉积物，沉积物+生物炭，沉积物+植物，沉积物+生物炭+植物）以研究使用15 N池稀释的N迁移和转化。结果表明，添加0.75％的生物炭显着提高了沉淀物的pH和持水量，分别为0.29和2.6％。添加生物碳可抑制沉积物15 N–N 2 O的排放，并减少Calamagrostis angustifolia对15 N的吸收。从不同沉积物层中的15 N分布，发现生物炭可能会增加N浸出的风险并加快其向下迁移的速度。同时，15 N的命运受到Calamagrostis angustifolia种植的影响，减少了渗漏和残留物中的残留物。植被小生境抑制了N 2 O的排放，因为Calamagrostis angustifolia有效地与微生物竞争，并利用N自身的生长和发育。因此， Calamagrostis angustifolia作为去除BMP的潜在选择，可能有利于消除农业面源氮污染。
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