海莲红树林土壤CH_4动态研究

CH_4 Dynamics in Sediments of Bruguiera sexangula Mangrove at Hegang Estuary

对海南东寨港河港河口海莲红树林土壤CH4动态进行研究。CH4通量季节变化规律为春季>夏季>秋季>冬季,所有季节所有滩面其平均值为1.21 mg/(m2d)。不同季节CH4产生量平均值的大小顺序也为春季>夏季>秋季>冬季,所有季节所有滩面其平均值为8.28 mg/(m2d);土壤理化因子对河港海莲林土壤CH4产生率的重要性依次为全氮>NaCl>Na+>Cl->SO42->含水量>总含盐量>有机质。暖季CH4氧化量高于冷季,平均值为7.06 mg/(m2d)。在所有季节所有滩面上,河港海莲林土壤CH4传输率的平均值为28.21%。

CH4 dynamics in sediments of a Bruguiera sexangula mangrove were studied at Hegang estuary of Dongzhai harbor in Hainan. Seasonal pattern of CH4 fluxes is spring > summer > autumn > winter with average value of 0.56 mg/(m2d). According to multi-factor linear regression, the effect order of soil physical and chemical factors on CH4 production rate is total N > NaCl > Na+ > Cl- > SO42- > water content > total salt content > organic matter. Mean value in all seasons and flats is 8.28 mg/(m2d) for CH4 production, 7.06 mg/(m2d) for CH4 oxidation, 28.21% for CH4 transportation ratio and 6.18 mg/m2 for CH4 pool. Similar seasonal patterns were found for CH4 flux, production, oxidation and pool.