论文部分内容阅读
用乙炔为抑制剂，气相色谱法测定了1997年夏季太湖梅梁湾口沉积物－水界面的反硝化率和N2O的自然排放率，太湖梅梁湾沉积物的反硝化率为1．4－5．6μmolN2／（m2·h），N2O的自排放率为0．08－0．66μmolN2／（m2·h）．探讨了沉积物－水界面NO3-交换动态．指出沉积物内硝化－反硝化作用是太湖湖泊生态系统氮循环过程中一个重要的环节．在湖泊水土界面氮交换中，沉积物具有吸收水体中NO3-的性能．
Using acetylene as inhibitor, the denitrification rate and natural discharge rate of N2O at the sediment-water interface of Meilan Bay of Taihu Lake in summer of 1997 were determined by gas chromatography. The denitrification rate of sediments in Meiliang Bay of Taihu Lake was 1.4-5 .6μmolN2 / (m2 · h), N2O self-emission rate of 0.08-0.66μmolN2 / (m2 · h). The NO3-exchange dynamics at sediment-water interface was discussed. It is pointed out that nitrification and denitrification in sediments are an important link in the nitrogen cycle of Taihu lake ecosystem. Sediment has the function of absorbing NO3- in the water during the nitrogen exchange at lake water-soil interface.