[1]LI Zhe,HU Feinan,YANG Zhihua,et al.Effect of Soil Surface Electric Field on Aggregate Stability and Water Infiltration of Typical Black Soil[J].Research of Soil and Water Conservation,2021,28(05):61-66.
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Effect of Soil Surface Electric Field on Aggregate Stability and Water Infiltration of Typical Black Soil
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
61-66
Column:
Public date:
2021-08-20
- Title:
- Effect of Soil Surface Electric Field on Aggregate Stability and Water Infiltration of Typical Black Soil
- Keywords:
- surface potential; electric field strength; aggregate stability; infiltration rate; cumulative infiltration amount
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- The effective utilization of water and soil resources is important for sustainable agricultural development,and also critical for the reasonable development of fertile land resources in the black soil region of the northeast China. Soil water infiltration affects both the agricultural production and the ecological environment. In this study,5 electrolyte solutions with concentrations of 1,0.1,0.01,0.001 and 0.000 1 mol/L were adopted to quantitatively adjust the surface electric field around soil particles for investigating the effect of surface electric field strength on black soil aggregate stability and water infiltration. The results show that:(1)with the decrease of electrolyte concentration,the surface potential(in absolute value)and electric field strength of soil particles increase; as a result,soil aggregates changed from stablility into instablility with 0.01 mol/L being the turning point of soil aggregate stability;(2)in the process of soil water infiltration,the position of wetting front,infiltration rate and cumulative infiltration amount all decrease with the decrease of electrolyte concentration; moreover,the average soil water infiltration rate and stable infiltration rate show the same tendency with that of soil aggregate stability; average soil water infiltration rate and stable infiltration rate first decrease greatly from 1 mol/L to 0.01 mol/L,then the variation is much more gentle with further decrease of electrolyte concentration;(3)soil surface electric field affects the process of water infiltration through affecting the stability of soil aggregates and changing the distribution of soil pore channels. These result reveal that soil electric field can be of vital significance to water infiltration and aggregate stability of the black soil in the northeast China,which can provide theoretical references for the efficient utilization of soil water and the prevention of soil erosion.
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Last Update:
2021-08-20