Specific cation effects on soil water infiltration and soil aggregate stability–Comparison study on variably and permanently charged soils

IF 6.1 1区农林科学 Q1 SOIL SCIENCE

Soil & Tillage Research Pub Date : 2024-11-30 DOI:10.1016/j.still.2024.106385

Shishu Yang , Rui Tian , Haiyang Wang , Yekun Zhang , Hang Li

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引用次数: 0

Abstract

Improving soil hydraulic properties is one of important purposes of soil tillage. Recent studies on permanently charged soil have shown specific cation effect on soil water infiltration. In this study, specific cation effects on soil water infiltration and soil aggregate stability of both variably and permanently charged soils were comparatively examined. It was found that, specific cation effects on soil water infiltration and soil aggregate stability are quite different for permanently and variably charged soils. For the permanently charged soil, the sequence of specific cation effects on soil water infiltration was Li⁺ << K⁺ < Cs⁺, which was in accordance with the cation polarizability sequence of Li⁺ (0.029 Å³) << K⁺ (0.88 Å³) < Cs⁺ (2.56Å³); but for the variably charged soil, the sequence changed to Cs⁺ > Li⁺ > K⁺. Moreover, the sequence of cation concentration effect on permanently charged soil water infiltration rate (SWIR) was SWIR (0.0001 mol/L) < SWIR (0.001 mol/L) < SWIR (0.01 mol/L) < SWIR (0.1 mol/L) whereas that for the variably charged soil changed to SWIR (0.1 mol/L) < SWIR (0.0001 mol/L) ≈ SWIR (0.01 mol/L) < SWIR (0.001 mol/L). The differences of specific cation and cation concentration effects on soil water infiltration for the two soils came from those on soil aggregate stability. For permanently charged soils, soil electric field determined soil aggregate stability. However, for variably charged soils, besides soil electric field, osmotic pressure, positively charged colloids and surface reaction of metal cation may possibly play critical role in soil aggregate stability.

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特定阳离子对土壤水分入渗和土壤团聚体稳定性的影响——变荷土与永久荷土的比较研究

改善土壤水力特性是土壤耕作的重要目的之一。近年来对永久带电土壤的研究表明，阳离子对土壤水分入渗有特定的影响。本研究比较研究了变荷土和永久荷土中特定阳离子对土壤水分入渗和团聚体稳定性的影响。研究发现，固定荷电土壤和变荷电土壤的比阳离子对土壤水分入渗和团聚体稳定性的影响存在较大差异。对于永久带电土壤，比阳离子对土壤水分入渗的影响顺序为Li+ <；<；K + & lt;Cs+，与Li+的阳离子极化顺序一致（0.029 Å3） <<；K+ (0.88 Å3) <；2.56 c + (a3);而变荷土则依次为Cs+ >；李+比;K +。此外，阳离子浓度对土壤永荷水入渗速率（SWIR）的影响顺序为：SWIR(0.0001 mol/L) <；SWIR(0.001 mol/L) <；SWIR(0.01 mol/L) <；SWIR(0.1 mol/L)，而变电荷土壤则变为SWIR(0.1 mol/L) <；SWIR(0.0001 mol/L)≈SWIR(0.01 mol/L) <；短波红外成像(0.001 mol / L)。两种土壤比阳离子和阳离子浓度对土壤水分入渗的影响差异来源于对土壤团聚体稳定性的影响。对于永久带电土壤，土壤电场决定土壤团聚体稳定性。然而，对于变荷性土壤，除土壤电场、渗透压外，带正电的胶体和金属阳离子的表面反应可能对土壤团聚体稳定性起关键作用。

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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.