海南岛灌丛土壤有机碳分布特征

发布时间：2019-07-26 05:08

【摘要】：海南岛土壤有机碳研究工作多集中在森林土壤,而灌丛土壤尚未引起足够重视。本文以海南岛24个灌丛样地的72个土壤剖面为研究对象,分析其有机碳含量、有机碳密度及其碳储量,以期揭示海南岛灌丛土壤有机碳的分布特征,并初步估算海南岛灌丛土壤的有机碳储量,为评价海南岛灌丛的重要生态价值提供理论依据。结果表明:海南岛灌丛土壤平均有机碳含量为(6.20±0.61)g/kg,平均土壤有机碳密度为5.94 kg/m~2;土壤有机碳含量及各土层统一到10 cm厚度的平均有机碳密度随土壤深度的增加而减少;海南岛灌丛土壤(100 cm)的有机碳储量约为1.48×10~7t。其中,土壤表层(0~30 cm)与(0~50 cm)的贡献率分别为46.15%和65.28%,与其它类型土壤一致。
[Abstract]:Most of the research work on soil organic carbon in Hainan Island is concentrated in forest soil, but thicket soil has not been paid enough attention to. In this paper, 72 soil profiles of 24 scrub plots in Hainan Island were studied, and their organic carbon content, organic carbon density and carbon storage were analyzed in order to reveal the distribution characteristics of soil organic carbon in Hainan Island, and to estimate the organic carbon storage in Hainan Island thicket soil, which provided a theoretical basis for evaluating the important ecological value of Hainan Island scrub. The results showed that the average organic carbon content of thicket soil in Hainan Island was (6.20 卤0.61) g / kg, the average soil organic carbon density was 5.94 kg/m~2; soil organic carbon content and the average organic carbon density of each soil layer unified to 10 cm decreased with the increase of soil depth, and the organic carbon storage of Hainan Island thicket soil (100 cm) was about 1.48 脳 10 ~ 7t / kg / kg, respectively. The contribution rates of soil surface layer (0 鈮，

本文编号：2519351