苏打盐渍土剖面盐分动态变化特征分析

根据实测的土壤盐分要素,分析了不同季节土壤盐分含量、电导率及主要离子在土壤剖面中的动态变化及其原因。通过对不同季节各离子含量在土壤垂向剖面中的分布进行统计分析,研究它们在土壤中的分布均匀性和迁移性大小。并通过建立秋季不同深度土壤主要组分之间的相关矩阵,发现除SO42-外其他各离子含量之间存在着较强的相关性,并运用线性回归分析不同季节土壤含盐量与苏打盐渍土主要离子HCO3-含量之间的关系,结果计算得出的离子含量与实测值之间的误差较小,因此可以根据土壤含盐量来确定各离子含量,而SO42-则可根据土壤含盐量和其他各离子含量进行大致估算。本文对不同季节苏打盐渍土盐分动态的研究,为松嫩平原苏打盐渍土的改良和控制提供了科学依据。

Analysis of Salt Dynamic Characters in Saline- sodic Soil Sections

According to measured soil salt elements,dynamical changes of soil salt contents, conductivity and dominating ions in soil sections in different seasons were analyzed.Distributionsof every ion content in vertical soil section in different seasons were analyzed statistically and uniformityand transferenceof these ions in soil as well as their variationalreasons were studied.Through correlative matrix based on main components of different depth of soil in autumn,it was found that ions showed close correlations among each other except SO_42-,and the relations between soil salt content and main ion HCO_3-in different seasons were analyzed using linear regression.The error between calculated and actual values was comparativesmall,so ions content could be ascertained based on soil salt contents,SO_42-content could be estimated roughly through soil salt content and other ions.Studies of soil salt dynamics in saline-sodic soil in different seasons provided scientificbasis for the improvement and control of salinized and alkalinesoil in Songnen plain.