红黏土与风沙土复配对水分入渗特征的影响  

Influence on the water infiltration characteristics of red clay and aeolian sandy soil compounding

作　　者：郝斯然 蒙仲举 HAO Siran;MENG Zhongju(School of Desert Control Science and Engineering,Inner Mongolia Agricultural University,010018,Hohhot,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,呼和浩特010018

出　　处：《中国水土保持科学》2025年第2期138-147,共10页Science of Soil and Water Conservation

基　　金：内蒙古自治区科技计划“水沙交汇处流沙入黄机制研究及其综合治理效果评价”(2022YFHH0076);鄂尔多斯市重大科技攻关项目“光伏电场沙害防治综合技术研究”(2022EEDSKJZDZX020-4);新时代铸牢中华民族共同体意识下的内蒙古生态治理体系创新与发展(ZLJD24033)。

摘　　要：为探究红黏土不同复配比添加改良风沙土的水文效应,为风沙土改良提供理论依据,将红黏土与风沙土按照质量比0∶1(纯风沙土)、1∶4、2∶3、3∶2、4∶1、1∶0(纯红黏土)混合,采用环刀法测定土壤入渗速率,分析红黏土与风沙土复配对水分入渗的影响,并对其入渗过程进行模拟。添加红黏土后,复配土中黏粒含量显著增加,较风沙土提高18.57~123.43倍,改善土壤粒径均质性,土壤质地变细;不同配比下复配土饱和持水率、毛管持水率、田间持水率以及毛管孔隙度随着红黏土复配量的增加逐渐增大,复配土毛管孔隙度较风沙土提高1.10~1.21倍,保水性能增强;随着红黏土复配量的增加,初始入渗速率和平均入渗速率逐渐减小,土壤达到稳定入渗阶段的时间延长;1∶4复配土水分入渗能力显著衰减,有效抑制水分向深层渗漏,显著改善风沙土漏水现象;不同比例红黏土与风沙土复配,土壤水分入渗可以较好地拟合为Horton模型,在考虑综合效益的前提下,红黏土与风沙土按照质量比1∶4配比改良效果最佳。[Background]In the arid regions of northern China,the natural environment is characterized by poor conditions and significant ecological damage,resulting in a prevalence of land desertification and soil erosion.These conditions impede sustainable economic and social development.The combination of red clay and aeolian sandy enhances the soil’s water absorption and retention properties,thereby reducing water loss from the aeolian sandy.However,there is a paucity of research addressing the soil improvement effects of red clay and aeolian sandy,especially in the Kubuqi Desert.In order to investigate the hydrological effect of red clay compounding aeolian sandy soil,providing a theoretical foundation for advancing the management of aeolian sandy soil.[Methods]In this study,red clay and aeolian sandy soil were mixed in accordance with a series of mass ratios,including 0∶1(completely aeolian sandy soil),1∶4,2∶3,3∶3,4∶1,and 1∶0(completely red clay).The infiltration rate of the soil was then determined through the utilization of the ring knife method,and the effects of integrating red clay with aeolian sandy soil on the water infiltration process were subsequently analyzed.This investigation involved a thorough examination of how the combination of these two soil types influences water infiltration dynamics.In addition,a detailed simulation of the infiltration process was performed.[Results]The content of clay in the compound soil increased significantly when the red clay added,ranging from 18.57 to 123.43 times the original value.Additionally,the range of particle size distribution expanded,enhancing the homogeneity of soil particle size and resulting in a finer soil texture.The saturated water holding rate,capillary water holding rate,water holding rate in the field increased gradually with the addition of red clay,and the capillary porosity of the compound soil was 1.10 to 1.21 times than that of the aeolian sandy soil,which enhanced water retention capabilities.As the proportion of red clay within the co

关 键 词：红黏土 风沙土 复配土壤 土壤改良 土壤入渗特征 土壤入渗模型 

分 类 号：S157[农业科学—土壤学]