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为揭示海南植胶区土壤有机碳分布特征,对其4种母质发育的典型砖红壤的64个土壤剖面数据进行分析。结果表明:4种母质发育的砖红壤0~60 cm土壤有机碳平均含量为6.29~8.33 g/kg,以铁质砖红壤最高,硅质砖红壤最低;0~60 cm土壤有机碳平均密度为4.85~6.55 kg/m2,以铁铝质砖红壤最高,以铁质砖红壤最低;4种母质发育的砖红壤有机碳含量和有机碳密度在土壤剖面中具有明显的垂直分布性,随着土壤深度的增加呈降低趋势;土壤有机碳含量与pH呈极显著负相关(p<0.01),与土壤全氮呈极显著正相关(p<0.01)。综上所述,海南植胶区的砖红壤为低有机碳密度土壤,其植胶生产中应改进土壤管理措施增加土壤固碳。
To reveal the distribution characteristics of soil organic carbon in plasticized area of Hainan Island, the data of 64 soil profiles of typical brick-like red soil with four parent materials were analyzed. The results showed that the average organic carbon content of 0-60 cm soil layer in the three parent soil types was 6.29-8.33 g / kg, the highest in iron brick and the lowest in siliceous brick red soil. The average density of organic carbon in 0-60 cm soil layer was 4.85 ~ 6.55 kg / m2, with the highest in iron-aluminum brick red soil and the lowest in iron brick red soil. The organic carbon content and organic carbon density in the soil profiles of the three parent materials have obvious vertical distribution in the soil profile, The soil organic carbon content showed a significantly negative correlation with pH (p <0.01), and had a significant positive correlation with soil total nitrogen (p <0.01). In summary, the red soil in Hainan rubber plantation area is low organic carbon density soil, its rubber production should improve soil management measures to increase soil carbon sequestration.