摘要
土壤盐渍化是宁夏引黄灌区农业发展面临的主要问题之一。为了查明导致土壤盐碱危害的主要盐分离子,为改良利用盐碱地提供科学依据,利用相关分析法和主成分分析法,研究了该区不同类型盐碱地土壤盐分及盐分离子相关性。结果表明,盐化土壤全盐除与HCO3-相关性不显著外,与其他离子均呈显著或极显著正相关,无论是盐化土壤还是碱化土壤,土壤总盐均与SO42-、Cl-、Na+呈极显著正相关,Na+与Cl-、SO42-之间也呈极显著正相关,相关系数大于0.80;碱化土壤碱化度、pH与CO32-呈极显著正相关,主成分分析结果表明,Na+、SO42-、Cl-可作为研究区土壤盐化状况的特征因子。Cl-、SO42-、Na+、CO32-可作为研究区土壤碱化状况的特征因子。消除试区土壤盐碱化,应重点对Cl-、SO42-、Na+、CO32-这些有害盐分离子含量进行消减。
Soil salinization is one of the main problems for agricultural district. In order to ascertain the main salt ions causing soil saline-alkali development in Ningxia irrigation damage, and to provide scientific evidence for improving saline-alkali land, correlations between soil salinity and salt ions of different types of saline-alkali soil in Ningxia irrigation district were studied by the methods of correlation and principle component analysis. The results showed that, there were significant positive correlation between salt content of the saline soil and other salt ions except HCO3-. Whether saline soil or alkali soil, there were extremely significant positive correlation between total soil salt content and SO42-, CI-, Na ＋, respectively. There were significant positive correlations among Na＋ and CI-, S042- with a correlation coefficient greater than 0.80. Soil alkalinity of the alkali soil and pH showed an extremely significantly positive correlation with CO32- content. The principal component analysis results showed that, Na＋, SO42- and C1- contents were Eigen factors of soil salinization condition of the study area, and CI-, SO42-, Na ＋ and CO32- contents were Eigen factors of soil alkalization condition of the study area. In order to eliminate soil salinization and basification of the study area, it should focus on eliminating these harmful salt ions contents such as CI-, S042-, Na＋ and CO32-.
出处
《中国农学通报》
CSCD
2012年第35期221-225,共5页
Chinese Agricultural Science Bulletin
基金
国家"十一五"科技支撑计划重点项目(2007BAC08B05:2007BAC08B02)
关键词
引黄灌区
盐化土壤
碱化土壤
盐分特征
相关性
Ningxia irrigation district
saline soil
alkali soil
salinity characteristics
correlation
