黑藻叶、茎腐解释放溶解性有机物的特性
发布时间：2019-05-20 06:17
【摘要】：通过三维荧光光谱(3DEEM)和紫外吸收光谱(UV-vis)技术结合平行因子分析法(PARAFAC),研究了沉水植物黑藻死亡过程中叶、茎腐解释放DOM的特性,进一步揭示草型湖泊中水生植物腐解对水体的影响机制.结果表明,黑藻叶比茎腐解地更快,释放出更多的TN、TP,烘干处理减缓了叶和茎中TN的释放(P0.05),对TP的释放无明显影响(P0.05).采用平行因子分析法鉴别出叶中含有1种类蛋白质组分C1和2种类腐殖酸组分C2、C3,茎中含有2种类蛋白质C1、C3及2种类腐殖酸组分C2、C4.腐解前期(0~40d)DOM中类蛋白物质占主导地位,且叶与茎中类蛋白质含量比值约为1:1.5,此时水中DO偏低,DOC和NH_3-N含量升高,腐解中期(40~60d)类蛋白和类腐殖酸组分共同作用,腐解后期(60~90d)以类腐殖质为主,且叶与茎中类腐殖质含量比值约为1:1,此时电导率、TN和PO_4-P含量明显升高,腐解释放DOM可能影响水体的DO和pH值.
[Abstract]:Three dimensional fluorescence spectroscopy (3DEEM), ultraviolet absorption spectroscopy (UV-vis) and parallel factor analysis (PARAFAC),) were used to study the release of DOM from stem decay during the death of submerged plant black algae. The mechanism of aquatic plant decomposition on water body in grassy lakes was further revealed. The results showed that the decomposition of black algae leaves was faster than that of stems, and the release of TN,TP, from leaves and stems slowed down the release of TN from leaves and stems (P 0.05), but had no significant effect on the release of TP (P 0.05). Parallel factor analysis was used to identify 1 kind of protein component C1 and 2 kinds of humic acid component C _ 2, C _ 3, 2 kinds of humic acid component C _ 2, C _ 4 in stem, 2 kinds of protein C _ 1, C _ 3 and 2 kinds of humic acid component C _ 2, C _ 4. In the early stage of decomposition (0 鈮，
本文编号：2481427
[Abstract]:Three dimensional fluorescence spectroscopy (3DEEM), ultraviolet absorption spectroscopy (UV-vis) and parallel factor analysis (PARAFAC),) were used to study the release of DOM from stem decay during the death of submerged plant black algae. The mechanism of aquatic plant decomposition on water body in grassy lakes was further revealed. The results showed that the decomposition of black algae leaves was faster than that of stems, and the release of TN,TP, from leaves and stems slowed down the release of TN from leaves and stems (P 0.05), but had no significant effect on the release of TP (P 0.05). Parallel factor analysis was used to identify 1 kind of protein component C1 and 2 kinds of humic acid component C _ 2, C _ 3, 2 kinds of humic acid component C _ 2, C _ 4 in stem, 2 kinds of protein C _ 1, C _ 3 and 2 kinds of humic acid component C _ 2, C _ 4. In the early stage of decomposition (0 鈮，
本文编号：2481427
本文链接：https://www.wllwen.com/shengtaihuanjingbaohulunwen/2481427.html
