Impact of concentrated flow and shallow water table on pesticides trapping efficiency of vegetative filter strips – A case study of Northeast China

IF 6.1 1区农林科学 Q1 SOIL SCIENCE

Soil & Tillage Research Pub Date : 2025-03-29 DOI:10.1016/j.still.2025.106557

Liming Yan , Yang Ou , Yuanyuan Sui , Huiping Liu , Yang Deng , Qi Cui , Minglian Shang

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引用次数: 0

Abstract

The Northeast Black Soil Region is a key grain production area in China, facing significant pesticide runoff risks due to extensive agricultural activity. Vegetative filter strips (VFS) are crucial for reducing diffuse pollution, but their effectiveness is compromised by concentrated flow (CF) and shallow water table (SWT) conditions. Quantitatively assessing the negtive effects of these hydrological processes on VFS pesticide removal performance has thus become an urgent issue. This study combined field monitoring with VFSMOD-W simulation to quantify the impacts of CF and SWT on VFS pesticide removal performance. Results show that under typical meteorological conditions in the Black Soil Region, the performance decline of VFS accelerates when CFR exceeds 30 %, and becomes significantly compromised when CFR reaches 60 %. However, SWT effects are less severe, with significant performance declines observed only when it is below 0.5 m. When SWT rises to 0.2 m, outflow reaches 2.2 times the inflow, pesticide removal drops by 55 %, while sediment removal remains stable. When both CF and SWT reach critical thresholds, the decline in pesticide removal is not additive. Pearson correlation analysis and redundancy analysis (RDA) further highlighted that impacting factors explain 86.8 % of VFS performance variability, with CF, SWT, VFS length in the direction of flow (VL), soil vertical saturated hydraulic conductivity (VKS), and rainfall intensity (T) identified as primary influencing factors. To optimize VFS performance, identifying CF pathways and extending VFS length are essential. Additionally, deep plowing to break plow pans and using mixed plant species with robust root systems for riparian restoration are recommended strategies for SWT. This integrated approach offers insights for enhancing VFS efficiency in mitigating agricultural pollution in the Black Soil Region and similar ecosystems globally.

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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.