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利用2005年多目标区域土壤地球化学调查及20世纪70年代末全省第二次土壤普查土壤有机碳数据,对河北平原土壤有机碳密度及碳储量的时空变化规律、固碳机制及固碳潜力等问题进行了研究。结果表明,全省第二次土壤普查时土壤有机碳储量124.86Mt,2005年为176.08Mt,26年中增加了41.02%,表现出“碳汇”效应。据不同土类有机碳含量最大值估算,河北平原尚有188.6Mt的固碳潜力。稳定的Corg/N比、较高的N、P、Se含量等土壤理化环境条件以及农业施肥、秸杆还田、浅耕、免耕等农业管理措施促进了土壤有机碳的积累;而干旱碱性富钙、盐渍化、高硅钾的沙性土壤环境以及人为对自然湿地的扰动则会使有机碳丢失。
Based on the multi-target regional soil geochemical survey in 2005 and the soil organic carbon data of the second soil survey in the late 1970s in the 20th century, the spatial and temporal variation of soil organic carbon density and carbon storage in Hebei Plain, carbon sequestration mechanism and carbon sequestration potential And other issues were studied. The results showed that the soil organic carbon storage of the second soil survey in the province was 124.86Mt, 176.08Mt in 2005 and 41.02% in 26 years, showing a “carbon sink” effect. According to different soil organic carbon content estimates, there are 188.6Mt Hebei carbon sequestration potential. Stable Corg / N ratio, high N, P, Se soil physical and chemical environmental conditions as well as agricultural management measures such as agricultural fertilization, straw returning, shallow tillage and no-tillage promoted the accumulation of soil organic carbon. However, Calcareous, salinized, sandy Silica soil conditions and man-made disturbance to natural wetlands can lead to the loss of organic carbon.