多元侵蚀力驱动下中国Mollisol地区不同耕作制度下的长坡侵蚀-沉积格局

IF 6.8 1区农林科学 Q1 SOIL SCIENCE

Soil & Tillage Research Pub Date : 2025-08-22 DOI:10.1016/j.still.2025.106821

Hongqiang Shi , Fenli Zheng , Jiaying Sheng , Xinyue Yang , Rui Liang , Lei Wang , Ximeng Xu

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引用次数: 0

摘要

东北Mollisol地区特殊的地理特征，加上不合理的耕作活动和多重侵蚀力（雨、雪、风）的共存，导致土壤侵蚀严重。然而，对多种侵蚀力驱动下不同耕作制度下长坡侵蚀-沉积模式的研究尚不多见。为此，本研究利用稀土元素示踪方法，研究了平耕（无垄耕）、纵向宽垄耕（LWT）和传统纵向垄耕（LRT）对320 m天然长坡的降雨、融雪和风蚀期长坡侵蚀-沉积和输沙空间格局的影响。降雨、融雪和风驱动的土壤侵蚀速率分别为1678.5 ~ 2558.5 t km−2 a−1，LWT为1089.0 ~ 1468.9 t km−2 a−1，LRT为181.9 ~ 314.4 t km−2 a−1，其中降雨和融雪驱动的FT、LWT和LRF的产沙量占总产沙量的88.0 % ~ 96.4 %。在降雨侵蚀期，三种耕作方式的坡面均以侵蚀为主，而沉积只发生在坡脚。在坡长0 ~ 120 m处沉积了73.6 %的沉积物。在0 ~ 80 m坡长处，LWT的沟槽沉积了50.7 %的泥沙，而LRT的沟槽则将全部泥沙带出整个坡长。在融雪侵蚀期，坡顶和坡顶均表现出侵蚀-沉积交替的空间格局，坡顶侵蚀以坡顶侵蚀为主。在风蚀期，三种耕作方式均存在明显的周期性变化，表现为强-弱交替。研究结果可为实施精准的土壤保持措施控制中国Mollisol地区复合水土流失提供科学参考。

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Long slope erosion-deposition patterns under different tillage systems driven by multiple erosion forces in the Chinese Mollisol region

The special geographic characteristics coupled with unreasonable tillage activity and coexistent multiple erosive forces (rainfall, snowmelt, and wind) induce severe soil erosion in the Mollisol region of Northeast China. However, the studies on long slope erosion-deposition patterns under different tillage systems driven by multiple erosion forces are rare. Therefore, this study was to identify the effects of flat tillage (non-ridge tillage, FT), longitudinal wide-ridge tillage (LWT), and traditional longitudinal ridge tillage (LRT) practices on the spatial patterns of long slope erosion-deposition and sediment transport along the three natural long slopes with 320 m slope length by using Rare Earth Elements (REE) tracing method during the rainfall, snowmelt and wind erosion periods. Soil erosion rates driven by rainfall, snowmelt and wind were 1678.5–2558.5 t km⁻² a⁻¹ for the FT, 1089.0–1468.9 t km⁻² a⁻¹ for the LWT and 181.9–314.4 t km⁻² a⁻¹ for the LRT, respectively, in which the sediment yield with the FT, LWT and LRF driven by rainfall and snowmelt accounted for 88.0 %-96.4 % of the total sediment yield. During the rainfall erosion period, the erosion regime was dominated on the slopes with these three tillage practices, whereas deposition only occurred at the slope toe. For the FT, 73.6 % of the sediment mass was deposited at the 0–120 m slope length. A total of 50.7 % of the sediment was deposited at the 0–80 m slope length with the furrows of LWT, whereas all the sediment was transported out of the entire slope with the furrows of LRT practice. During the snowmelt erosion period, a spatial pattern with erosion-deposition alternations was observed for the FT and LWT, whereas the erosion regime dominated on the slope with the LRT practice. During the wind erosion period, there were evident periodical changes with strong-weak alternations for all three tillage practices. The findings of this study served as a scientific reference for implementing precise soil conservation measures for controlling compound soil erosion in the Chinese Mollisol region.

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来源期刊

Soil & Tillage Research 农林科学-土壤科学

CiteScore

13.00

自引率

6.20%

发文量

266

审稿时长

5 months

期刊介绍： Soil & Tillage Research examines the physical, chemical and biological changes in the soil caused by tillage and field traffic. Manuscripts will be considered on aspects of soil science, physics, technology, mechanization and applied engineering for a sustainable balance among productivity, environmental quality and profitability. The following are examples of suitable topics within the scope of the journal of Soil and Tillage Research: The agricultural and biosystems engineering associated with tillage (including no-tillage, reduced-tillage and direct drilling), irrigation and drainage, crops and crop rotations, fertilization, rehabilitation of mine spoils and processes used to modify soils. Soil change effects on establishment and yield of crops, growth of plants and roots, structure and erosion of soil, cycling of carbon and nutrients, greenhouse gas emissions, leaching, runoff and other processes that affect environmental quality. Characterization or modeling of tillage and field traffic responses, soil, climate, or topographic effects, soil deformation processes, tillage tools, traction devices, energy requirements, economics, surface and subsurface water quality effects, tillage effects on weed, pest and disease control, and their interactions.