东北黑土区侵蚀沟治理碳汇作用监测评价
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1.松辽水利委员会 松辽流域水土保持监测中心站;2.吉林农业大学 资源与环境学院;3.水利部水土保持监测中心;4.黑龙江省水利科学研究院

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Monitoring and evaluation of carbon sequestration effects of erosion gully control in the black soil region of northeast China
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The Center of Soil and Water Conservation Monitoring,Ministry of Water Resources

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    摘要:

    [目的]东北黑土区侵蚀沟治理是控制水土流失、保护耕地资源的重要措施。为评估其水土保持碳汇能力,优化侵蚀沟治理措施,提升碳汇能力。[方法]本研究在黑土区选取4条代表性治理沟作为项目情景、1条与治理沟特征相似的未治理沟作为基准线情景。通过样方法和刈割法测定植被生物量,实验测定0–20、20–40cm土壤有机碳、容重等指标,量化项目情景的保土保碳、减蚀减排、土壤增汇、植被增汇、封秸封碳等能力,评估黑土区侵蚀沟治理所积累的碳汇量。[结果]侵蚀沟治理具有保土保碳、减蚀减排、增绿增汇、封秸封碳等作用,秸秆填埋治理沟的单位面积的年碳汇量最高(10.99 t/(hm2·a)),其次为植被加工程措施(5.21 t/(hm2·a)),最少的为单纯的植被措施(3.45~4.96 t/(hm2·a));乔灌草、乔木和乔木加工程措施均以植被碳库提升为主;秸秆填埋治理模式以土壤碳库提升为主。各种侵蚀沟治理措施的碳汇作用明显,具有较大的碳汇潜力,预计单位面积上积累的碳汇量可达1730774.89 t/a。[结论]研究结果可为今后侵蚀沟治理模式选择与碳汇能力评估提供科学支撑。

    Abstract:

    [Objective]Erosion gully control in Northeast China"s black soil region is vital for controlling soil erosion and protecting farmland. To assess its carbon sequestration potential in soil and water conservation, optimize control measures, and enhance carbon sequestration, this study chose four representative controlled gullies as project scenarios and one similar uncontrolled gully as the baseline scenario.[Methods] Vegetation biomass was measured using the sample plot method and the harvest method. Indicators such as soil organic carbon and bulk density in the 0–20 cm and 20–40 cm soil layers were experimentally determined. The abilities of soil conservation and carbon preservation, erosion reduction and emission mitigation, soil and vegetation carbon enhancement, and straw-sealing carbon sequestration in the project scenarios were quantified to assess the accumulated carbon sequestration amount resulting from erosion gully control in the black soil region. [Results]The results show that erosion gully control contributes to soil and carbon preservation, erosion and emission reduction, soil and vegetation carbon enhancement, and straw-sealing carbon sequestration. The annual carbon sequestration amount per unit area is highest for gullies treated with straw burial (10.99 t/(hm2·a)), followed by those treated with vegetation combined with engineering measures (5.21 t/(hm2·a)), and lowest for those treated solely with vegetation measures (3.45–4.96 t/(hm2·a)). For control measures involving tree-shrub-grass combinations, trees alone, and trees combined with engineering measures, the enhancement of the vegetation carbon pool is predominant. In contrast, the straw burial treatment mode primarily enhances the soil carbon pool. The carbon sequestration effects of various erosion gully control measures are significant, indicating substantial carbon sequestration potential. It is estimated that the accumulated carbon sequestration amount per unit area can reach 1 730 774.89 t/a. [Conclusion]The research findings provide scientific support for the selection of erosion gully control modes and the assessment of carbon sequestration capacity in the future.

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  • 收稿日期:2025-11-09
  • 最后修改日期:2026-04-28
  • 录用日期:2026-04-30
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