东北黑土区长缓坡耕地横坡垄作与地形对土壤可蚀性的交互作用

doi:10.3864/j.issn.0578-1752.2023.23.012

Abstract

Abstract:

【Objective】The soil erosion of slope farmland in Chinese black soil region is becoming more and more serious. This study mainly focused on the interaction between transverse ridge tillage and topography on soil erodibility, which could provide a scientific theoretical basis for precise prevention of soil erosion of slope farmland in black soil region. 【Method】A typical slope farmland in the Hongxing farm in Beian city of Heilongjiang Province was selected as research object. A total of 25 sampling points were designed along both the transverse ridge tillage direction and longitudinal waterline direction. The soil erodibility K values of the corresponding sample points were calculated and tested by One-way ANOVA method. The influence factors of soil erodibility K value were analyzed by using the geographic detector model. 【Result】In the transverse ridge tillage direction, the ridge soil erodibility decreased gradually from the top to the foot of slope, and the K value decreased by 6.2%. The furrow soil erodibility decreased gradually from the shoulder to the foot of slope, and the K value decreased by 5.8%. In the waterline direction, due to the blocking effect of ridge terrace on surface runoff, soil erodibility K value of ridge and furrow did not change significantly along the slope. Geodetector analysis showed that the influence of the transverse ridge tillage on soil erodibility K value was the greatest, and its interpretation rate was more than 51% and 18% in the ridge and furrow, respectively. The transverse ridge tillage and other factors had a significant interaction enhancement effect on K value, particularly the interaction between the transverse ridge tillage and topography. 【Conclusion】 The soil erodibility K value of slope farmland in the black soil region had obvious spatial variability. There was significant interaction between the transverse ridge tillage and topography on soil erodibility. The transverse ridge tillage could significantly intercept runoff and reduce soil erosion. Due to the long slope in the transverse ridge tillage, it was easy to collect runoff at the foot of the slope, and increase the potential risk of ridge failure.

Key words: soil erodibility, transverse ridge tillage, longitudinal waterline, topography, interaction, slope farmland of black soil region

YU BoWei, ZHANG QingWen, HAO Zhuo, SHI YuLong, LI XueLiang, LI MengNi, JING XueKai. Interaction Between Transverse Ridge Tillage and Topography on Soil Erodibility Along the Long Gentle Slope in a Typical Black Soil Region of Northeast China[J].Scientia Agricultura Sinica, 2023, 56(23): 4706-4716.

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交互作用类型 Interaction	判断准则 Judgement criteria
双因子增强 Double-factor enhancement	q(x₁∩x₂)>Max(q(x₁), q(x₂))
非线性增强 Nonlinear enhancement	q(x₁∩x₂)>q(x₁) + q(x₂)
单因子非线性减弱 Single-factor nonlinear weakening	Min[q(x₁), q(x₂)]>q(x₁∩x₂)>Max[q(x₁), q(x₂)]
非线性减弱 Nonlinear weakening	q(x₁∩x₂)>Min[q(x₁), q(x₂)]
独立 Independent	q(x₁∩x₂)=q(x₁) + q(x₂)

影响因子 Influencing factor	级别 Level	级别说明 Level description
横坡垄作 Transverse ridge tillage	1-5	1.坡顶 2.坡肩 3.坡背 4.坡脚 5.坡足 1. Top 2. Shoulder 3. Back 4. Foot 5. Toe
顺坡水线 Longitudinal waterline	1-5	1.上坡 2.中上坡 3.中坡 4.中下坡 5.下坡 1. Upper 2. Mid-upper 3. Middle 4. Mid-lower 5. Lower
土壤容重 Soil density	1-4	通过ArcGIS 10.2的自然间断点方法提取 Extracted by natural breaks method in ArcGIS 10.2
土壤有机碳 Soil organic carbon	1-4	通过ArcGIS 10.2的自然间断点方法提取 Extracted by natural breaks method in ArcGIS 10.2
高程 Elevation	1-4	通过ArcGIS 10.2的自然间断点方法提取 Extracted by natural breaks method in ArcGIS 10.2
坡度 Slope	1-4	通过ArcGIS 10.2的自然间断点方法提取 Extracted by natural breaks method in ArcGIS 10.2

影响因子 Influencing factor	横坡垄作 Transverse ridge tillage	顺坡水线 Longitudinal waterline	土壤容重 Soil density	土壤有机碳 Soil organic carbon	高程 Elevation	坡度 Slope
横坡垄作 Transverse ridge tillage	0.511
顺坡水线 Longitudinal waterline	1.000*	0.040
土壤容重 Soil density	0.761*	0.468*	0.081
土壤有机碳 Soil organic carbon	0.774*	0.270*	0.467*	0.070
高程 Elevation	0.898*	0.321*	0.590*	0.241^#	0.148
坡度 Slope	0.712*	0.460*	0.439*	0.555*	0.574*	0.169

影响因子 Influencing factor	横坡垄作 Transverse ridge tillage	顺坡水线 Longitudinal waterline	土壤容重 Soil density	土壤有机碳 Soil organic carbon	高程 Elevation	坡度 Slope
横坡垄作 Transverse ridge tillage	0.185
顺坡水线 Longitudinal waterline	1.000*	0.084
土壤容重 Soil density	0.758*	0.485*	0.103
土壤有机碳 Soil organic carbon	0.740*	0.281*	0.373*	0.059
高程 Elevation	0.901*	0.123^#	0.396*	0.267*	0.079
坡度 Slope	0.500*	0.453*	0.434*	0.463*	0.414*	0.067

Interaction Between Transverse Ridge Tillage and Topography on Soil Erodibility Along the Long Gentle Slope in a Typical Black Soil Region of Northeast China

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