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《Journal of China Agricultural University》 2015-05
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Study of the characteristics of soil salinization based on redundancy analysis in Pingluo,Ningxia

YU Wen-Jing;SUN Dan-feng;QU Wei;College of Resources and Environmental Sciences,China Argicultural University;  
The statistical analysis and Redundancy Analysis(RDA)of 101 soil profile samples in cultivated land of Pingluo County were taken to obtain the basic characteristics of the salinity data,the correlation of the elements and the major ions affecting the salinization indicators in each soil layers.Results indicated that:1)All soil layers were in the salinization state and there was an obvious phenomenon of salt accumulation in surface soil;2)The RDA results showed that the first two axes explained at least 80% of the salinization information.The linear combination of the axes and environmental factors reflected the relationship between the salinization indicators and salt ions well;3)Compared with conventional statistical methods,RDA contains a greater amount of information,also can more intuitive to express the characteristics of soil salinization and the main factors influencing the salinization indicators in the study area.RDA was an effective method for analyzing salinization information.It could provide a scientific basis for evaluation and governance of land salinization and land use management.
【Fund】: 国家自然科学基金资助项目(40871103)
【CateGory Index】: S156.41
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