吉林西部盐碱土壤水力学参数特征及其影响因素

doi:10.12068/j.issn.1005-3026.2016.02.025

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (2): 268-272.DOI: 10.12068/j.issn.1005-3026.2016.02.025

吉林西部盐碱土壤水力学参数特征及其影响因素

刘彩虹，卞建民，王宇

(吉林大学地下水资源与环境教育部重点实验室，吉林长春130021)

收稿日期:2014-07-14 修回日期:2014-07-14 出版日期:2016-02-15 发布日期:2016-02-18
通讯作者: 刘彩虹
作者简介:刘彩虹(1987-)，女，山东济南人，吉林大学博士研究生; 卞建民(1968-)，女，吉林延吉人，吉林大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目 (41072255).

Characteristics of Soil Hydraulic Parameters and Impact Factor Analysis for Saline-alkali Soils in the Western Jilin Province

LIU Cai-hong， BIAN Jian-min， WANG Yu

Key Laboratory of Groundwater Resources and Environment， Ministry of Education， Jilin University， Changchun 130021， China.

Received:2014-07-14 Revised:2014-07-14 Online:2016-02-15 Published:2016-02-18
Contact: LIU Cai-hong
About author:-
Supported by:
-

摘要/Abstract

摘要： 为探究吉林西部盐碱化土壤水力学参数的空间变化特征及其影响因素，测定了盐碱土和非盐碱土0~20， 20~40， 40~60， 60~80， 80~100cm土壤水分特征曲线(SWCC)、容重、全盐量、含水量、机械组成等，利用van Genuchten模型(VG)进行曲线拟合和参数求解.结果表明，VG模型适于描述研究区盐碱土水分特征曲线；盐碱与非盐碱土壤水分特征曲线和K_○s存在显著性差异；θ_○s和n值变异性较弱，θ_○r和α中等变异强度；K_○s的空间变异性较强，盐碱土剖面为强变异(CV=109.09%)，非盐碱土为中等变异强度(CV=51.09%)；土壤全盐量与pH值、土壤机械组成是土壤水分特征曲线及K_○s的主要影响因素.

关键词: 土壤水分特征曲线, 饱和导水率, 盐碱土, van Genuchten模型, 吉林西部

Abstract: To explore the spatial variation characteristics and the impact factors of the soil hydraulic parameters for the saline-alkali soils in the western Jilin Province， we measured the soil-water characteristic curve(SWCC)， soil bulk density， salt content， moisture and mechanical composition in 0-20， 20-40， 40-60， 60-80， 80-100cm soil layers of saline-alkali and non- saline-alkali soil. The van Genuchten (VG) model was used to describe and solve parameters of SWCC. The results show that the VG model is suitable to describe the SWCC of the saline-alkali soils. There are significant differences of SWCC and K_○s between the saline-alkali and non- saline-alkali soils. For all the soils， the θ_○s and n show weak spatial variability， the θ_○r and α are moderate spatial variability， while the K_s of the spatial variability is strong for the saline-alkali soils (CV=109.09%) and has moderate spatial variability for non-saline-alkali soils (CV=51.09%). Soil mechanical composition， the soil salt content and pH value are the main impact factors for hydraulic parameters.

Key words: soil-water characteristic curve(SWCC), saturated hydraulic conductivity, saline-alkali soil, van Genuchten model, western Jilin Province

中图分类号:

刘彩虹，卞建民，王宇. 吉林西部盐碱土壤水力学参数特征及其影响因素[J]. 东北大学学报:自然科学版, 2016, 37(2): 268-272.

LIU Cai-hong， BIAN Jian-min， WANG Yu. Characteristics of Soil Hydraulic Parameters and Impact Factor Analysis for Saline-alkali Soils in the Western Jilin Province[J]. Journal of Northeastern University Natural Science, 2016, 37(2): 268-272.

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吉林西部盐碱土壤水力学参数特征及其影响因素

Characteristics of Soil Hydraulic Parameters and Impact Factor Analysis for Saline-alkali Soils in the Western Jilin Province

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