Authors: Xuefeng Xie*, College of Geography and Environmental Sciences, Zhejiang Normal University, Lijie Pu, School of Geographic and Oceanographic Sciences, Nanjing University, Juojun Jiang, College of Geography and Environmental Sciences, Zhejiang Normal University, Tao Wu, College of Geography and Environmental Sciences, Zhejiang Normal University
Topics: Marine and Coastal Resources, Soils, Land Use and Land Cover Change
Keywords: Soil salinization, Coastal tidal land, Redundancy analysis, Eastern China
Session Type: Paper
Start / End Time: 5:00 PM / 6:40 PM
Room: Marshall North, Marriott, Mezzanine Level
Presentation File: No File Uploaded
Purpose: Soil salinization is a major restricting factor for crop growth and agriculture productivity in coastal areas. This study aimed to investigate the impact of reclamation years on soil salinization and physicochemical properties in reclaimed coastal tidal land, and analysis the linkage between soil salinization and physicochemical properties after long-term reclamation. Methods: Soil sample sites were respectively collected from reclamation regions reclaimed in 1951, 1974, 1982, and 2007 according to typical land use types. Besides, the natural tidal flat were collected as control. Soil samples were divided into two parts to determine soil bulk density, soil water content, soil particle size distribution, soil salt content, pH, sodium adsorption ratio, exchangeable sodium percentage, cation exchange capacity, total nitrogen, total phosphorus, organic matter, alkaline hydrolyzed nitrogen and available phosphorus. One-way analysis of variations (ANOVA) was conducted to investigate the differences in soil properties within different reclamation years. The linkage between soil salinization and soil physicochemical properties was analyzed by redundancy analysis and Monte Carlo permutation.
Conclusions: Long-term reclamation could radically decreased soil salinization (SSC, pH, SAR, ESP) and apparently promoted soil nutrients accumulation (SOM, TN, TP, AN, AP, CEC). Furthermore, soil salinization are closely related to soil physicochemical properties, and soil PSD and soil nutrients were considered as the key factors for the differences of soil salinization.