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土壤盐分垂直分异特征的定量研究是农业生产、管理以及环境治理的重要内容。采用经典统计分析和层次聚类分析等方法,选择Pearson相关系数和欧氏距离作为聚类统计量,分析伊犁新垦区土壤剖面盐分的垂直分布特征。结果表明:伊犁新垦区土壤盐分存在很强的变异性,各层盐分的变异系数皆大于1,土壤剖面可分为表聚型盐分剖面、中聚型盐分剖面和底聚型盐分剖面等三种类型,根据盐分的数值大小,进一步可划分为非盐化土、表聚盐化土、中聚盐化土和底聚盐化土等四种类型,各占剖面总数的66%、5%、10%和19%。空间上伊犁新垦区土壤盐分垂直变化特征的差异性大,四种类型的盐化土皆有所分布,中聚盐化土和底聚盐化土分布的地区容易发生次生盐渍化,是农业生产和环境治理需要重点关注的区域。
The quantitative study of the vertical differentiation of soil salinity is an important part of agricultural production, management and environmental management. By using the methods of classical statistical analysis and hierarchical clustering analysis, Pearson correlation coefficient and Euclidean distance were chosen as clustering statistics to analyze the vertical distribution of soil salinity in the new reclamation area of Yili. The results showed that there was a strong variability of soil salinity in the new reclamation area of Yili, and the coefficient of variation of salinity in each layer was greater than 1. The soil profile could be divided into three types: epiphyllous salt profile, Type, according to the value of the salt value, can be further divided into four types of non-saline soil, table poly saline soil, poly-salt soil and the bottom poly-salinized soil, each of the total number of profiles of 66%, 5% 10% and 19%. Spatially, the difference in vertical changes of soil salinity in the newly reclaimed area of Yili is quite large. All four types of salinized soil are distributed. Secondary salinization is prone to occur in areas where the poly-salinized soil and the bottom poly-salinized soil are distributed Agricultural production and environmental governance need to focus on the area.