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对平罗县101个耕地土壤样点的进行统计分析和冗余分析,得到各层土壤盐分数据的基本特征,以及各要素的相关性和影响盐渍化指标的主要离子。结果表明:1)该区各层土壤都呈盐渍化状态,有明显的盐分表聚现象。2)RDA结果显示前2个排序轴反映了该区80%以上的土壤盐渍化信息,排序轴与环境因子的线性结合程度较好的反映了盐渍化指标与盐分离子之间的关系。3)与常规统计方法相比,RDA所包含的信息量更大,而且能够更直观地表达研究区土壤盐渍化特征以及影响盐渍化指标的主要因素,是分析盐渍化信息的有效方法,能够为区域盐渍化评价和治理以及土地利用管理提供科学依据。
The statistical analysis and redundancy analysis of soil samples from 101 cultivated land in Pingluo county were carried out. The basic characteristics of soil salinity data of each layer were obtained, and the correlation of each factor and the main ions affecting salinization index were obtained. The results showed that: 1) The soil in all layers of the area was salinized, with obvious phenomenon of salt aggregation. 2) The RDA results show that the first two ordinal axes reflect more than 80% of soil salinization information in this area. The linear combination of ordination axes and environmental factors reflects the relationship between salinization index and salt ions. 3) Compared with the conventional statistical methods, RDA contains more information and more intuitive expression of the characteristics of soil salinization in the study area as well as the main factors affecting the salinization index, which is an effective method for analyzing salinization information , Can provide a scientific basis for the evaluation and management of regional salinization and land use management.