1.吉林农业大学资源与环境学院,长春 130118
2.中国科学院东北地理与农业生态研究所, 哈尔滨 150001
3.吉林省土壤肥料总站,长春 130012
张立波(2001—),女,硕士研究生,主要从事水土保持研究。E-mail:zlb202504@163.com
杨帆(1987—),男,博士,硕士生导师,主要从事水土保持与区域地质调查研究。E-mail:yangfanjlnd@163.com
收稿:2025-06-27,
修回:2025-08-25,
录用:2025-09-04,
网络首发:2025-11-24,
纸质出版:2026-04-01
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张立波,郭明明,巩子瑞,等.黑土切沟沟头土壤特性分异及其对K值影响[J].水土保持学报,2026,40(2):93-102.
ZHANG Libo, GUO Mingming, GONG Zirui, et al. Differentiation of soil characteristics in gully head of black soil and its influence on K value[J]. Journal of Soil and Water Conservation,2026,40(2):93-102.
张立波,郭明明,巩子瑞,等.黑土切沟沟头土壤特性分异及其对K值影响[J].水土保持学报,2026,40(2):93-102. DOI: 10.13870/j.cnki.stbcxb.2026.02.003. CSTR: 32310.14.stbcxb.2026.02.003.
ZHANG Libo, GUO Mingming, GONG Zirui, et al. Differentiation of soil characteristics in gully head of black soil and its influence on K value[J]. Journal of Soil and Water Conservation,2026,40(2):93-102. DOI: 10.13870/j.cnki.stbcxb.2026.02.003. CSTR: 32310.14.stbcxb.2026.02.003.
目的
2
探究典型黑土区切沟沟头分层土壤可蚀性
K
值与理化性质的关系,揭示关键因子作用机制,为黑土区水土流失治理提供理论依据。
方法
2
通过对海伦市海南乡发育在农田内的切沟沟头进行调查,选取11个典型黑土切沟沟头剖面,划分土壤层次(A层、B层、C层),采集分层土壤样品,测定土壤理化性质。根据EPIC模型计算土壤可蚀性
K
值。
结果
2
1)不同粒级水稳性团聚体(
>
5、2~5、1~2、0.5~1、
>
0.25 mm)均随沟头土层深度增加呈下降趋势,平均重量直径、几何平均直径、土壤总孔隙度、有机质等指标均表现为A层
>
B层
>
C层,土壤体积质量与之相反;2)切沟沟头土壤可蚀性
K
值为0.042 9~0.051 7(t·h)/(MJ·mm),属于高可蚀性,C层可蚀性
K
值显著高于A、B层;3)相关性分析结果表明,土壤可蚀性
K
值与土壤体积质量、黏粒质量分数呈极显著正相关,与土壤总孔隙数量、有机质呈极显著负相关。结构方程模型表明,土壤体积质量、黏粒质量分数对可蚀性
K
值存在显著直接正向影响,有机质对可蚀性
K
值存在极显著直接负向影响。切沟沟头受成土作用影响分层明显,且土壤理化性质差异显著,C层侵蚀风险高,有机质是影响可蚀性
K
值的关键因素。
结论
2
研究结论可为东北黑土区侵蚀沟治理和揭示土壤侵蚀机制提供科学依据。
Objective
2
Explore the relationship between the
K
value of soil erodibility and physicochemical properties of stratified soils at the head of the gully in the typical black soil region, reveal the mechanism of key factors, and provide a theoretical basis for soil erosion management in the black soil region.
Methods
2
By investigating the head of gullies developed in farmland in Hainan Township, Hailun City, 11 typical black soil gullies head profiles were selected, soil layers (A, B, and C layers) were divided, stratified soil samples were collected, and soil physicochemical properties were determined. Soil erodibility
K
values were calculated according to the EPIC model.
Results
2
1) The water stable aggregates of different grain sizes (
>
5 mm, 2―5 mm, 1―2 mm, 0.5―1 mm, and
>
0.25 mm) showed a decreasing trend with the increase of soil depth at the head of the gully, and the indicators of mean weight diameter, geometric mean diameter, total soil porosity and organic matter were all in the A layer
>
B
layer
>
C layer, and the soil bulk density was in the opposite direction; 2) Soil erodibility
K
value ranges from 0.042 9 to 0.051 7 (t·h)/(MJ·mm), which belongs to high erodibility, and the erodibility
K
value of the C layer is significantly higher than that of the A and B layers; 3) The results of correlation analysis showed that the soil erodibility
K
value was significantly positively correlated with soil bulk density and clay content, and was significantly negatively correlated with the total number of soil pores and organic matter. Structural equation modeling showed that the soil bulk density and clay content had a significant direct positive effect on the
K
value of erodibility, and organic matter had a highly significant direct negative effect on the
K
value of erodibility. The head of the gully is clearly stratified by soil formation and has significant differences in soil physicochemical properties, with a high risk of erosion in the C layer. Organic matter content is the key factor affecting the
K
value of erodibility.
Conclusion
2
This study can provide a scientific basis for managing erosion gully and revealing the soil erosion mechanism in the typical black soil region.
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