干旱地区农业研究Issue(6)：198-202,5.
松嫩平原苏打盐渍土钠吸附比的间接推算
Estimating sodium adsorption ratio(SAR)of saline-sodic soils in songnen plain,northeast China
摘要
Abstract
The Sodium adsorption ration (SAR)of soil can be calculated from measured Na+concentration and pre-dicted Ca2++Mg2+(bivalent cation)concentration or from measured bivalent cation concentration and predicted Na+concentration .In this study,four methods were used to estimate SAR of saline-sodic soils in Songnen Plain,Northeast China by using two set of soil samples .First method,the bivalent cation concentration was calculated by the total cation concentrations (TCC)that was derived from the measured Na+concentration and electrical conductivity (EC);second method,the Na+concentration was calculated from the predicted TCC and measured bivalent cation concentration;third method,the bivalent cation concentration was calculated from the measured Na+concentration and total anions concen-trations (TAC);fourth method,the Na+concentration was calculated from the measured bivalent cation concentration and TAC .The Results by T-test for a paired-samples were showed that:There was no significant difference between the calculated SAR and measured SAR (P>0 .05).However,the slope of the regression between measured SAR and pre-dicted SAR calculated from the first and third method was 0 .66 and 0 .79,respectively .This shown these methods by measured Na+concentration and predicted bivalent cation concentration to estimate SAR with a poor accuracy .For the second and fourth method,the slop of the regression between measured SAR and predicted SAR was 0 .96 and 1 .10,re-spectively,which was very close to 1 .0 with a high accuracy .So in practical use,suggested that methods by measured bivalent cation concentration and predicted Na+concentrations to estimate SAR .关键词
盐渍土/钠吸附比/电导率/钠离子浓度/二价阳离子浓度/阳离子总浓度/阴离子总浓度Key words
saline soil/sodium adsorption ration/electrical conductivity/sodium concentration/bivalent cation concentration/total cation concentration/total anion concentrations分类
农业科技引用本文复制引用
迟春明,王志春..松嫩平原苏打盐渍土钠吸附比的间接推算[J].干旱地区农业研究,2013,(6):198-202,5.基金项目
国家自然科学基金项目（41161037）；公益性行业（农业）科研专项经费项目 （）
