天然沸石对土壤水分运动特性及水稳性团聚体的影响  

Effect of Natural Zeolite on Soil Water Movement Characteristics and Water Stability Aggregates

作　　者：吴军虎[1] 刘侠 邵凡凡 李玉晨 王泽祥 WU Junhu;LIU Xia;SHAO Fanfan;LI Yuchen;WANG Zexiang(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048

出　　处：《灌溉排水学报》2020年第4期34-41,共8页Journal of Irrigation and Drainage

基　　金：国家自然科学基金重点项目(51239009);西北干旱生态水利工程国家重点试验室科研课题项目(2016ZZKT-9);陕西省教育厅重点试验室科研计划项目(17JS096)。

摘　　要：【目的】为研究沸石对土壤水分运动及团聚体分布的影响。【方法】向土壤中加入0%、5%、10%、15%、20%的沸石,进行室内土柱试验和水稳性团聚体分析试验,研究了施加沸石对土壤水分运动和土壤水稳性团聚体的影响。【结果】①沸石可以减小土壤累计入渗量和入渗速率,并阻碍湿润锋的推进,与对照组相比,添加沸石试验组的累计入渗量和入渗率不断减小,添加20%沸石,累计入渗量、入渗率、湿润锋减小幅度最大;②利用Kostiakov和Philip入渗模型拟合试验数据,Kostiakov模型和Philip模型拟合后R2均大于0.99,拟合效果较好,拟合参数A、S均小于对照组,进一步验证沸石有减缓入渗的作用。③沸石对水稳性团聚体及分形维数的影响与其添加量有较大关系,沸石施加量由0增加到10%时,≥0.25 mm土壤水稳性团聚体的量、分形维数分别由10.8%增加到18.3%、2.69减小到2.58,沸石施加量继续增加到20%,≥0.25 mm团聚体量减小至6%,分形维数增大至2.72。【结论】沸石能够减缓土壤水分入渗过程,在一定量的施加范围内,沸石能增大土壤中水稳性团聚体量。In the loess area of China, the problems of drought, lack of rainfall and shortage of water and soil resources are increasingly prominent. The soil quality is seriously degraded, which restricts the development of local agriculture. Zeolite plays an important role in soil structure and nutrient improvement. The aggregate content is closely related to the stability of soil structure. Soil water movement affects infiltration and runoff process. 【Objective】This paper is to study the effects of zeolite on soil water movement and aggregate distribution, and to provid theoretical basis for improving the structure and water storage capacity of loess area, increasing crop yield and increasing growth, and sustainable development of agriculture.【Method】 By adding different proportion of zeolite to soil, indoor soil column test and water stability aggregate analysis test were carried out. The effects of adding 0%, 5%, 10%, 15%, and 20% zeolite on soil water infiltration, soil water stability agg regate volume, average mass diameter and fractal dimension were studied. 【Result】 Zeolite could reduce the amount and rate of cumulative soil infiltration, and hinder the advancement of the wetting front. Compared with the control group, the cumulative infiltration amount and rate of the zeolite test group were continuously reduced. When 20% zeolite was added, the infiltration amount, rate, and wetting front decreased the most. Kostiakov and Philip infiltration models were used to fit the experimental data. After fitted, R2 was greater than 0.99, and the fitting effect was better. The fitting parameters A and S were smaller than those in the control group.The absorption rate and stable infiltration rate decreased in different degrees, further verify that zeolite could slow down infiltration. The effect of zeolite on water-stable aggregates and fractal dimensions had a greater relationship with its content. When the zeolite content was increased from 0 to 10%, the content of water-stable aggregates in ≥0.25 mm increased

关 键 词：沸石 水分 土壤 入渗 

分 类 号：S152[农业科学—土壤学]