摘要
采用室内人工土柱模拟淋溶实验,比较分析了不同PAM用量处理的盐渍化土壤蓄水能力、导水性能和盐分淋出效果的动态变化。结果表明:(1)不同PAM用量对土壤蓄水能力影响不显著,只有在PAM用量为0.8 g·kg^(-1)时,PAM加入后土体增加的水量与对照相比增加了1.71%;经PAM处理后土壤导水性能降低,渗透土柱时间均高于对照,土壤饱和导水率与对照相比差异显著,且大幅度降低。(2)1 h时,PAM各处理的Na^(+)、Cl^(-)浓度均高于对照,浓度随PAM用量的增加呈增大趋势,且Na^(+)、Cl^(-)淋出速率在PAM用量高于0.4 g·kg^(-1)和0.2 g·kg^(-1)时显著提高;不同PAM用量对Na^(+)、Cl^(-)淋出量的影响显著,PAM用量为1.0 g·kg^(-1)时效果最明显,与对照相比,Na^(+)、Cl^(-)的淋出量分别增加了70.58%和69.89%。
The dynamic changes of water retention capacity,water conductivity and salt leaching effect of salinized soil treated with different PAM dosage were compared and analyzed by indoors simulated soil column leaching experiment.The results are as follows:(1)Different PAM dosage has no significant influence on soil water storage capacity.Only when PAM dosage is 0.8 g·kg^(-1),the water volume of the soil exceeds that of the control,with an increase of 1.71%.After being treated by PAM,the soil water conductivity is reduced,and the penetration duration of soil column is higher than that of the control.The saturated hydraulic conductivity is significantly different from that of the control,and it is significantly reduced.(2)At 1 h,Na^(+) and Cl^(-) concentrations of each PAM treatment are higher than those of the control group.Na^(+) and Cl^(-) concentrations show an increasing trend with the increase of PAM dosage,and the leaching rate of Na^(+) and Cl^(-) increases significantly when PAM dosage is higher than 0.4 g·kg^(-1) and 0.2 g·kg^(-1).Different PAM dosage has a significant influence on Na^(+) and Cl^(-) leaching.The treatment,in which PAM dosage is 1.0 g·kg^(-1),is the most effective one in salt leaching process.Compared with the control,Na^(+) and Cl^(-) leaching amount increases by 70.58%and 69.89%,respectively.
作者
杨永秦
潘英华
张振华
史俊杰
刘璐
骆伟蓉
YANG Yongqin;PAN Yinghua;ZHANG Zhenhua;SHI Junjie;LIU Lu;LUO Weirong(School of Resources and Environmental Engineering,Ludong University,Yantai 264039,China;Heilongjiang Yiyoukang Biotechnology Co.,Ltd.,Mudanjiang 157100,China;School of Water Conservancy and Hydropower,Xi an University of Technology,Xi an 710000,China)
出处
《鲁东大学学报（自然科学版）》
2022年第1期18-26,42,共10页
Journal of Ludong University:Natural Science Edition
基金
国家自然科学基金(41771256)。
关键词
聚丙烯酰胺
保蓄水性能
导水性能
盐分淋溶
Polyacrylamide
water retention capability
water hydraulic conductivity
salt leaching
