灌溉排水学报2025，Vol.44Issue(2)：63-71,9.DOI:10.13522/j.cnki.ggps.2024198
非离子表面活性剂对土壤结构性质及水流运动特征的影响
Effects of nonionic surfactants on soil structure,soil properties and soil water flow
摘要
Abstract
[Objective]Nonionic surfactants are soil amendments that could modify water surface tension,alter soil repellency,and affect water flow and distribution in soil.We experimentally investigate the effects of nonionic surfactants in reclaimed water on soil structure,soil properties and soil water infiltration,aiming to improve the management of agricultural use of reclaimed water and protect soil and water environments.[Method]Laboratory experiments were conducted using repacked soil columns to examine the influence of nonionic surfactants on soil physical properties and water infiltration.Treatments included irrigation water with 0,0.02,0.05,and 0.1 critical micelle concentration(CMC)of nonionic surfactants,combined with three irrigation frequencies(daily,every two days,and every three days)and an irrigation schedule alternatingly using nonionic surfactant-laden water and freshwater.Measurements in the experiment included soil aggregate stability,bulk density,capillary and non-capillary porosity,non-capillary porosity ratio,soil water repellency,surface infiltrability,and preferential flow heterogeneity.[Result]Nonionic surfactants improved soil aggregate stability and porosity but increased soil hydrophobicity and water flow instability.Low-frequency and high-amount irrigation led to disintegration of soil aggregates,while high-frequency and low-amount irrigation exacerbated preferential flow heterogeneity in water infiltration.Alternating nonionic surfactant-laden water and freshwater in irrigation enhanced soil aggregate stability,increased soil porosity,and reduced soil hydrophobicity and preferential flow.[Conclusion]Alternating irrigation with reclaimed water and freshwater can effectively balances the positive and negative effects of nonionic surfactants on soil properties and soil water infiltration.This can optimize the use of reclaimed water for agriculture while maintaining soil health and reducing environmental risks.关键词
再生水灌溉/非离子表面活性剂/土壤结构/土壤斥水性/地表入渗能力/优先流Key words
reclaimed water irrigation/nonionic surfactant/soil structure/soil water repellency/surface infiltrability/preferential flow分类
农业科技引用本文复制引用
盛丰,李忠润,张彬..非离子表面活性剂对土壤结构性质及水流运动特征的影响[J].灌溉排水学报,2025,44(2):63-71,9.基金项目
国家自然科学基金项目(51579020) （51579020）
湖南省自然科学基金项目(2022JJ30602) （2022JJ30602）
