| 摘要: |
| 向土壤中加入不同比例的沸石,进行室内土柱试验和水稳性团聚体分析试验,以研究施加0%、5%、10%、15%、20%沸石对土壤水分运动和土壤水稳性团聚体的影响结果表明：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；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。沸石对水稳性团聚体的影响与其含量有较大关系,沸石含量由0增加到10%时,≥0.25mm土壤颗粒的含量由10.8%增加到18.3%,分形维数则由2.69减小到2.58,沸石含量继续增加到20%,≥0.25mm土壤颗粒的含量减小至6%,分形维数增大至2.72,分形维数的变化说明沸石的添加影响土壤团聚体含量。 |
| 关键词: 沸石；土壤团聚体；土壤改良剂 |
| DOI： |
| 分类号:S152.7 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Effect of Zeolite on Water Movement Characteristics and Water-Stable Aggregate of Black Clay |
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Liu xia, WU Jun-hu
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1. State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area,Xi’an University of Technology,Xi’an 710048
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| Abstract: |
| In order to study the effects of 0%, 5%, 10%, 15% and 20% zeolite on soil water movement and soil water-stable aggregates, different proportions of zeolite were added to the soil. The results showed that zeolite could reduce the cumulative infiltration rate and infiltration rate of soil, and hinder the advance of wetting front. Compared with the control group, zeolite test group was added to the soil to study the effects of 0%, 5%, 10%, 15% and 20% zeolite on soil water movement and soil water-stable aggregates. The cumulative infiltration rate and infiltration rate are decreasing continuously, adding 20% zeolite, the cumulative infiltration rate, infiltration rate and wetting front decrease the largest extent; using Kostiakov and Philip infiltration model to fit test data, after fitting Kostiakov model and Philip model, R2 is greater than 0.99, the fitting effect is better, fitting parameters A and S are smaller than the control group, further verifying that zeolite has the effect of slowing down infiltration. The influence of zeolite on water-stable aggregates is related to its content. When zeolite content increases from 0 to 10%, the content of soil particles (> 0.25mm) increases from 10.8% to 18.3%, the fractal dimension decreases from 2.69 to 2.58, the content of zeolite continues to increase to 20%, the content of soil particles (> 0.25mm) decreases to 6%, and the fractal dimension increases to 2.72. The change of fractal dimension indicates that the addition of zeolite affects the soil. Soil aggregate content. . |
| Key words: Zeolite; soil agglomerates; soil conditioner |
