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• W957009312 abstract "通过为期一年的疏浚模拟试验,在试验室培养疏浚与对照柱样研究了底泥疏浚对内源氮释放的控制效果.研究结果发现,疏浚表层30cm能够有效的消减沉积物中有机质含量与孔隙水中NH₄⁺含量.在一年的试验周期内,疏浚和对照柱沉积物-水界面的NH₄⁺通量分别为5.3至18.6mg/(m²·d)与-9.4至67.5mg/(m²·d),疏浚柱沉积物-水界面的NH₄⁺通量总体上低于未疏浚对照的通量,尤其是在温度较高的月份,从2006年5-12月疏浚柱沉积物-水界面NH₄⁺释放通量显著低于未疏浚对照柱,疏浚沉积物的NH₄⁺的释放潜力低于未疏浚对照沉积物.研究结果表明,在外源得到有效控制的前提下,底泥疏浚是消减研究区内源氮负荷有效的技术手段.;A laboratory experiment for studying the effects of sediment dredging on nitrogen release from lake sediments was carried out through one-year incubation of undredged (control) and dredged cores. We found that dredging the upper 30cm layer of the sediment can efficiently reduce organic matter content in the sediment and the interstitial NH₄⁺ concentration. The NH₄⁺ fluxes of the dredged and undredged cores ranged from 5.3 to 18.6mg/(m²·d) and -9.4 to 67.5mg/(m²·d), respectively. The fluxes of the dredged cores were generally lower than those of the undredged(control) cores, with significant(P<0.05)differences in the fluxes of the dredged and undredged cores occurring between May and December of 2006. The NH₄⁺ in the dredged cores had a lower release potential than that in the control cores. Our results suggested that dredging may be a useful approach for decreasing internal nitrogen loading in Lake Taihu once the external loading was first effectively controlled." @default.
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• W957009312 date "2009-01-01" @default.
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• W957009312 title "Environmental effect of sediment dredging in lake: Ⅱ. the role of sediment dredging in reducing internal nitrogen release" @default.
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• W957009312 doi "https://doi.org/10.18307/2009.0304" @default.
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