Jin Zixin,Yang Yang,Zhang Hui,et al.Comparison of distribution characteristics between Brilliant Blue FCF and Br— as tracers on typical degraded slopes of black soil[J].Research of Soil and Water Conservation,2025,32(05):95-101,121.[doi:10.13869/j.cnki.rswc.2025.05.027]
典型退化黑土坡面土壤示踪亮蓝和Br—分布特征对比
- Title:
- Comparison of distribution characteristics between Brilliant Blue FCF and Br— as tracers on typical degraded slopes of black soil
- 文章编号:
- 1005-3409（2025）05-0095-07
- Keywords:
- soil physics; solute transport in soil; field tracer experiment; degraded slope of black soil
- 分类号:
- S152.7
- 文献标志码:
- A
- 摘要:
- [目的] 探究黑土退化坡面的土壤水分和溶质运移特征，为黑土区农业生产和管理提供科学依据。[方法] 在东北黑土区选取典型退化坡面，以亮蓝和溴离子（Br-）为示踪剂，在5个不同坡位分别开展野外混合示踪试验，分析、对比各土壤剖面的亮蓝染色面积比（DC）和Br-含量分布特征并探究其原因。[结果]（1）土壤中的Br-运移深度大于亮蓝，各坡位亮蓝下方均有Br-检出。（2）各坡位DC和Br-含量均随土层深度呈降低趋势，二者与土壤有机碳和黏粒含量均呈显著正相关（p<0.01），对应的Spearman秩相关系数介于0.39~0.85。（3）各土层深度DC和Br-含量均表现为坡顶和坡上较小，坡中、坡下和坡脚较大，该结果主要与不同坡位的侵蚀退化程度不同、土壤孔隙发育各异有关。[结论] 亮蓝和Br-在土壤中的分布模式基本一致，共同揭示了典型退化黑土坡面的土壤水分和溶质运移规律，可为当地的土壤水分和溶质运移模拟及预报提供有力支撑。
- Abstract:
- [Objective] This study aims to investigate the characteristics of soil water and solute transport on degraded slopes of black soil, providing a scientific basis for agricultural production and management in the black soil regions. [Methods] A typical degraded slope in the black soil region of Northeast China was selected for this study. Using Brilliant Blue FCF and Br- as tracers, field tracer experiments were conducted at five different slope positions. The dye coverage(DC) of Brilliant Blue FCF stained area and the distribution characteristics of Brcontent across different soil profiles were analyzed and compared, along with an investigation into their underlying causes. [Results] (1) The migration depth of Br- in the soil exceeded that of Brilliant Blue FCF, with Brdetected beneath the stained area at all slope positions.(2) DC and Br-content exhibited decreasing trends with soil depth across all slope positions. Both showed significant positive correlations with soil organic carbon and clay content(p<0.01), with Spearman's rank correlation coefficients ranging from 0.39 to 0.85.(3) Both DC and Br-content at different soil depths showed lower values at the summit and upper slope positions, but higher at the middle, lower, and toe slope positions. This spatial pattern was primarily attributed to variations in erosion-induced degradation and soil pore development at different slope positions. [Conclusion] The distribution patterns of Brilliant Blue FCF and Br- are basically consistent, jointly revealing the characteristics of soil water and solute transport in typical degraded slopes of black soil. These findings provide robust support for the simulation and forecast of soil water and solute transport in the black soil region of Northeast China.
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备注/Memo
收稿日期：2024-11-27 修回日期：2024-12-24 接受日期：2025-01-13
资助项目：国家自然科学基金“东北黑土区横垄垮塌过程与动力机制”（42477345）
第一作者：金梓昕（2000—），女，辽宁锦州人，硕士研究生，研究方向为土壤侵蚀与水土保持。E-mail：202221051016@mail.bnu.edu.cn
通信作者：杨扬（1987—），女，福建将乐人，博士，副教授，主要从事土壤侵蚀与水土保持研究。E-mail：yang.yang@bnu.edu.cn