| Relationship between salinization and alkalization of sodic soil in Da’an City |
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| DOI：10.7606/j.issn.1000-7601.2007.02.32 |
| Key Words: sodic soil salinization alkalization Da'an City |
| Author Name | Affiliation | | LI Bin | Northeast Institute of Geography and Agricultural Ecology the Chinese Academy of Sciences, Changchun 130012, China；Graduate School of the Chinese Academy of Sciences, Beijing 100049, China | | WANG Zhi-chun | Northeast Institute of Geography and Agricultural Ecology the Chinese Academy of Sciences, Changchun 130012, China | | LIANG Zheng-wei | Northeast Institute of Geography and Agricultural Ecology the Chinese Academy of Sciences, Changchun 130012, China | | CHI Chun-ming | Northeast Institute of Geography and Agricultural Ecology the Chinese Academy of Sciences, Changchun 130012, China；Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| Salinization and alkalization parameters of sodic soil were measured.Relationship between salinization and alkalization was analyzed.Results show that the natric horizon and salic horizon locates at the same soil layer,which indicates that the relation of salinization to alkalization is close.Correlations between soil salt content and alkalization parameters including exchange sodium percentage(ESP),sodium adsorption ratio(SAR),total alkalinity,residual sodium carbonate(RSC) and pH are all significant.Values of soil ESP become high as soil salt content increases.Soil salt content under 8.0 g/kg accelerates hydrolytic reaction of exchangeable sodium rather than restrains it.Inhibiting effect of soil salt content on exchangeable sodium percentage is apparent when soil salt content exceeds 8.0 g/kg.Correlations between ions including Na+,CO32-,HCO3-and alkalization parameters are very significant.Correlation between Cl-and alkalization parameters except pH is also very significant.This reflects the salinization and alkalization characteristic in sodic soil simultaneously.Na+ and CO32-ion has a stronger influence on soil ESP than other soil soluble ions. |
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