天津滨海地区3种典型土壤水分物理特性  

Moisture-physical characteristics of three types of soils in Tianjin Binhai area

作　　者：杨红[1] 邵孝侯[1] 张林[1] 蔡飞[1] 翟亚明[1] 王振宇[2] 黄明勇[2] 

机构地区：[1]河海大学南方地区高效灌排与农业水土环境教育部重点实验室,江苏南京210098 [2]天津泰达园林建设有限公司,天津300457

出　　处：《河海大学学报（自然科学版）》2011年第4期431-435,共5页Journal of Hohai University(Natural Sciences)

基　　金："十一五"国家科技支撑计划(2007BAD67B03);水利部公益性行业(农业)科研专项(200903001-05)

摘　　要：采用压力膜仪法测定滨海地区盐渍土、吹填土和种植土3种典型土壤水分特征曲线,并用VG模型进行参数求解与曲线拟合.结果表明：VG模型能够较好地拟合天津滨海地区3种典型土壤的水分特征曲线,残差平方和较小.低吸力阶段,吹填土含水量最高,下降速度最快;高吸力阶段,吹填土的含水量介于盐渍土和种植土之间.心土层（20~40 cm）、底土层（40~60 cm）以及吹填土的土壤含水量高但有效性低.The moisture characteristics of three typical soils,saline soil,dredger fill soil and planting soil,were measured with the pressure membrane method in the Tianjin Binhai area.The parameters were calculated and the fitting curves were obtained using the VG mode.The results show that the VG model can fit the moisture characteristic curve of the three typical soils with a smaller residual sum of squares.At low suctions,dredger fill soil has the maximum water content and the fastest rate of decline;at high suctions,the water content of dredger fill is between those of the saline soil and planting soil.Although there is high soil water content in the subsoil layer at a depth of 20 cm to 40 cm,in the bottom layer at a depth of 40 cm to 60 cm,and dredger fill,the water availability and utilization rate are lower.

关 键 词：盐渍土 吹填土 土壤水分特征曲线 VG模型 

分 类 号：S152.7[农业科学—土壤学]