红崖山灌区土壤盐分空间分布特征

Spatial Distribution Characteristics of Soil Salinity in Hongyashan Irrigation Area

【目的】土壤盐渍化一直是生态环境修复和农业生产的重要影响因素,揭示土壤盐渍化程度与空间分布特征是区域盐渍化防治与治理的重要依据。【方法】以红崖山灌区0~20 cm表层土壤盐分数据以及室内试验分析数据为基础,以Arcgis为基础,结合经典统计学与地统计学方法,研究该区土壤含盐量及盐基离子的空间分布特征及其分布规律,以期为该区生态环境修复、盐渍土改良、农业生产发展等提供合理的依据。【结果】红崖山灌区土壤盐分整体呈现出西南侧整体偏低、局部偏高,东北侧偏高的趋势。其中,土壤含盐量、Ca^(2+)、Mg^(2+)、SO_(4)^(2-)和HCO_(3)^(-)的空间分布特征高度相似,表明红崖山灌区土壤中Ca^(2+)、Mg^(2+)与SO_(4)^(2-)、HCO_(3)^(-)为主要的结合方式。【结论】为该区生态环境修复、盐渍土改良、农业生产发展等提供合理的依据。

[Purposes]Soil salinization has always been an important factor affecting ecological environment restoration and agricultural production.Revealing the degree and spatial distribution characteristics of soil salinization is an important basis for regional salinization prevention and control.[Methods]Based on the 0~20 cm surface soil salinity data and laboratory analysis data in Hongyashan irrigation area,this paper studied the spatial distribution characteristics and distribution rules of soil salt content and basal-ion in this area by combining classical statistics and geostatistics.It is expected to provide reasonable basis for ecological environment restoration,saline soil improvement and agricultural production development in this area.[Findings]The results showed that the soil salinity in the Hongyashan irrigation area was generally low in the southwest,high in some parts,and high in the northeast.Among them,the spatial distribution characteristics of soil salt content,Ca^(2+),Mg^(2+),SO_(4)^(2-)and HCO_(3)^(-)were highly similar,indicating that Ca^(2+),Mg^(2+),SO_(4)^(2-)and HCO_(3)^(-)were the main binding modes in the soil of Hongyashan irrigation area.[Conclusions]It can provide reasonable basis for ecological environment restoration,salinized soil improvement and agricultural production development in this area.