脱硫石膏施用量对滨海盐碱土水分运移的影响  

Effect of Application Amount of Desulphurization Gypsum on Water Transport of Coastal Saline-Alkali Soil

作　　者：徐文硕 李克升 孔维航 耿雨晗 李全新 刘传孝[1] XU Wenshuo;LI Kesheng;KONG Weihang;GENG Yuhan;LI Quanxin;LIU Chuanxiao(College of Water Conservancy and Civil Engineering,Shandong Agriculture University,Tai􀆳an 271018,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018

出　　处：《人民黄河》2021年第9期110-114,共5页Yellow River

基　　金：山东省重点研发计划项目(2018GNC110023)。

摘　　要：通过室内土柱试验,研究了5种脱硫石膏质量掺加比(0、5%、10%、15%和20%)对滨海盐碱土水分入渗能力的影响,结果表明:掺加不同比例石膏均可提高土壤入渗能力,较高的石膏掺加比对土壤湿润锋和累计入渗量的促进作用下降;5%石膏掺加比可明显促进盐碱土中水分运移;360 min时掺加5%脱硫石膏盐碱土的湿润锋运移深度是原状盐碱土的近2倍;湿润锋运移距离和时间呈幂函数关系,累计入渗量与时间的关系符合Kostiakov入渗模型和Philip入渗模型;适量掺加脱硫石膏可提高土壤入渗能力,对改善滨海盐碱土中的水分运移状态效果显著。The influence of the mass mixing ratio(0, 5%, 10%, 15% and 20%) of five desulphurized gypsum to the water infiltration capacity of coastal saline-alkali soil was studied by laboratory soil column test. The results show that adding different proportions of gypsum can improve the soil infiltration capacity and the higher ratio of gypsum can reduce the promoting effect of soil wetting front and cumulative infiltration. The mixing ratio of 5% gypsum can obviously promote the water migration in saline-alkali soil. At 360 min, the wet front’s migration depth of C5 is nearly twice that of the undisturbed saline-alkali soil. At the same time, the migration of wetting front and time fitting of each treatment have a power function relationship and the fitting of cumulative infiltration amount and time is consistent with the Kostiakov infiltration model and Philip infiltration model. The results show that proper amount of desulphurized gypsum can improve soil infiltration capacity and has reference value for improving water transport in coastal saline-alkali soil.

关 键 词：滨海盐碱土 水分运移 脱硫石膏 湿润锋 累计入渗量 

分 类 号：S156.4[农业科学—土壤学] TV882.1[农业科学—农业基础科学]