乌梁素海湖滨带温室气体交换通量研究
发布时间：2018-12-07 13:16
【摘要】：作为中国八大淡水湖之一的内蒙古乌梁素海,它是全球范围内干旱草原及荒漠地区极为少见的大型多功能湖泊湿地,但是随着工业污水以及农田灌溉退水不断的流入,导致水体富营养化日益加重,而作为富营养化的特征指标N及P等含量,同时也对温室气体的排放产生了重要影响。本研究利用“静态暗箱-气相色谱法”,于2013.06～2013.11与2014.03～2014.12观测了乌梁素海湖滨带(岸上白刺群落→近岸碱蓬群落→湖中芦苇群落)CH4、N2O交换通量、生态系统总呼吸(TRE)及相关环境变量(土壤温度(5 cm)；土壤湿度(0-6 cm)；土壤铵态氮、硝态氮；土壤溶解性有机碳(DOC) (0-10 cm))。实验结果表明：乌梁素海湖滨带N2O交换通量和生态系统总呼吸具有明显的时间变化规律。在观测期间CH4交换通量为正值,即表现为源,CH4交换通量与土壤温度、土壤湿度及土壤铵态氮含量均呈极显著正相关关系(P0.01),与硝态氮含量呈极显著负相关关系(P0.01),CH4交换通量与DOC呈显著相关关系(P0.05)；湖滨带的N20交换通量与土壤温度、土壤硝态氮含量呈显著正相关关系(P0.05),与土壤湿度呈极显著负相关关系(P0.01),而与铵态氮之间呈显著负相关关系(P0.05),DOC对其没有显著影响；湖滨带生态系统总呼吸(TRE)在观测周期内呈现先升高后降低的趋势,其与土壤温度及土壤湿度均呈极显著正相关关系(P0.01),说明土壤温度与湿度对生态系统总呼吸(TRE)有显著影响,生态系统总呼吸(TRE)与DOC呈显著正相关关系(P0.05)。
[Abstract]:As one of the eight largest freshwater lakes in China, the Wuliangsuhai Sea in Inner Mongolia is a large, multifunctional lake wetland rarely seen in arid grasslands and desert areas around the world. However, with the continuous inflow of industrial sewage and farmland irrigation receding water, As a characteristic index of eutrophication, the contents of N and P also have an important effect on the emission of greenhouse gases. In this study, the CH4,N2O exchange fluxes in the lakeshore zone of Wuliangsuhai were observed by "static dark box gas chromatography" on March 06, 2013.11 and April 3, 2014, respectively, and the CH4,N2O exchange fluxes were observed in the lakeside zone of Suhai Lake (the community of Suaeda salsa on shore), and the Reed community in the lake of Suaeda salsa community on shore. Total respiration (TRE) of ecosystem and related environmental variables (soil temperature (5 cm);) Soil moisture (0-6 cm);) soil ammonium nitrogen, nitrate nitrogen; soil dissolved organic carbon (DOC) () 0-10 cm). The experimental results show that the N2O exchange flux and total respiration of ecosystem in the lakeside zone of Wuliangsuhai have obvious temporal variation. During the observation period, the CH4 exchange flux was positive, that is, the source. The CH4 exchange flux was positively correlated with soil temperature, soil moisture and soil ammonium nitrogen content (P0.01). There was a very significant negative correlation with nitrate nitrogen content (P0.01), and a significant correlation between CH4 exchange flux and DOC (P0.05). N20 exchange flux in lakeside zone was positively correlated with soil temperature and nitrate content (P0.05), negatively correlated with soil moisture (P0.01), and negatively correlated with ammonium nitrogen (P0.05). DOC had no significant effect on it. The total respiratory (TRE) of lakeshore ecosystem increased first and then decreased during the observation period, and showed a significant positive correlation with soil temperature and soil moisture (P0.01). The results showed that soil temperature and humidity had significant effects on total respiration (TRE) of ecosystem, and total respiration (TRE) and DOC were positively correlated (P0.05).
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X171
[Abstract]:As one of the eight largest freshwater lakes in China, the Wuliangsuhai Sea in Inner Mongolia is a large, multifunctional lake wetland rarely seen in arid grasslands and desert areas around the world. However, with the continuous inflow of industrial sewage and farmland irrigation receding water, As a characteristic index of eutrophication, the contents of N and P also have an important effect on the emission of greenhouse gases. In this study, the CH4,N2O exchange fluxes in the lakeshore zone of Wuliangsuhai were observed by "static dark box gas chromatography" on March 06, 2013.11 and April 3, 2014, respectively, and the CH4,N2O exchange fluxes were observed in the lakeside zone of Suhai Lake (the community of Suaeda salsa on shore), and the Reed community in the lake of Suaeda salsa community on shore. Total respiration (TRE) of ecosystem and related environmental variables (soil temperature (5 cm);) Soil moisture (0-6 cm);) soil ammonium nitrogen, nitrate nitrogen; soil dissolved organic carbon (DOC) () 0-10 cm). The experimental results show that the N2O exchange flux and total respiration of ecosystem in the lakeside zone of Wuliangsuhai have obvious temporal variation. During the observation period, the CH4 exchange flux was positive, that is, the source. The CH4 exchange flux was positively correlated with soil temperature, soil moisture and soil ammonium nitrogen content (P0.01). There was a very significant negative correlation with nitrate nitrogen content (P0.01), and a significant correlation between CH4 exchange flux and DOC (P0.05). N20 exchange flux in lakeside zone was positively correlated with soil temperature and nitrate content (P0.05), negatively correlated with soil moisture (P0.01), and negatively correlated with ammonium nitrogen (P0.05). DOC had no significant effect on it. The total respiratory (TRE) of lakeshore ecosystem increased first and then decreased during the observation period, and showed a significant positive correlation with soil temperature and soil moisture (P0.01). The results showed that soil temperature and humidity had significant effects on total respiration (TRE) of ecosystem, and total respiration (TRE) and DOC were positively correlated (P0.05).
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X171
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