海南东寨港红树林土壤二氧化碳和甲烷排放通量研究

发布时间：2018-05-29 18:53

本文选题：红树林 + 土壤　；参考：《湿地科学》2017年03期

【摘要】：2013年11月至2014年10月期间,在海南东寨港红树林中的天然海莲(Bruguiera sexangula)群落和人工无瓣海桑(Sonneratia apetala)群落区,采用静态箱—气相色谱法和LI-8100A土壤碳通量测定系统,每月6~11日,在6块采样地,分别采集气样和土样,测定了土壤理化指标,测量和估算了土壤CO_2和CH_4排放通量。在研究中,对采样点的土壤进行了4种处理,分别为去除土壤中的植物根系、去除土壤中的凋落物、去除土壤中的植物根系+凋落物、保持土壤原状,对比了4种处理下土壤CO_2和CH_4排放通量,分析影响天然海莲群落和人工无瓣海桑群落区土壤CO_2和CH_4排放通量的主要因素。研究结果显示,天然海莲群落和人工无瓣海桑群落区土壤的平均CO_2排放通量为(420.0±26.1)mg/(m~2·h),平均CH_4平均排放通量为(29.9±1.4)mg/(m~2·h),人工无瓣海桑群落区土壤的CO_2和CH_4排放通量显著大于天然海莲群落区;植物群落类型,尤其是植物根系,能明显影响土壤CO_2和CH_4排放通量,土壤表面凋落物覆盖、土壤养分含量、土壤含水量、气温和降水量都能影响土壤CO_2和CH_4排放通量。
[Abstract]:From November 2013 to October 2014, the natural sea lotus Bruguiera sexangula community and the Sonneratia apetala) community in mangrove forests of Dongzhai Port, Hainan Province, were studied by static box-gas chromatography and LI-8100A soil carbon fluxes measurement system, from 6to 11 days per month. The physical and chemical indexes of soil were measured and the emission fluxes of CO_2 and CH_4 were measured and estimated in 6 samples. In the study, four kinds of treatments were carried out on the soil of the sampling site, which were to remove the plant roots, remove the litter in the soil, remove the litter of the plant root in the soil, and keep the soil intact. The emission fluxes of CO_2 and CH_4 in soil under four treatments were compared and the main factors affecting the emission fluxes of soil CO_2 and CH_4 in the natural and artificial non-petal mulberry communities were analyzed. The results showed that the average CO_2 emission fluxes of the soil and the average CH_4 emission fluxes of the natural and artificial non-valved mulberry communities were 420.0 卤26.1)mg/(m~2 and 29.9 卤1.4)mg/(m~2, respectively. The soil CO_2 and CH_4 emission fluxes in the artificial non-valved mulberry communities were significantly higher than those in the natural sea lotus communities. Plant community types, especially plant roots, could significantly affect soil CO_2 and CH_4 fluxes, soil surface litter cover, soil nutrient content, soil moisture content, air temperature and precipitation all affected soil CO_2 and CH_4 emission fluxes.
【作者单位】：海南师范大学;
【基金】：国家自然科学基金项目(31260131和31660126) 海南师范大学青年教师基金项目(QN1245)资助
【分类号】：S714

【相似文献】