| Modeling on sensitivity of soil salt ions to electrical conductivity of soil extract |
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| DOI：10.7606/j.issn.1000-7601.2011.06.27 |
| Key Words: salt ion electrical conductivity of soil extract sensitive factor principal component analysis grey re-lational analysis |
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| Abstract: |
| A study was conducted on the sensitivity of soil salt ions to the electrical conductivity of soil extract to
promote technical progress in improved alkaline field and salt water movement theory in depth. A preliminary qualitative analysis was first made by applying grey relational analysis in electrical conductivity of soil extract and salt ions，and then by default factor analysis and principal component analysis for further authentication. The results show that: Cl- and Na+ ions are mors sensitive than any other ions to the electrical conductivity of soil extract; the results of qray relational analysis method are the same as the results of principal component analysis model based on the default factor method; the seven salt ions have multicollinearity on electrical conductivity of soil extract，and the conductivity prediction model based on principal component reqression method can make reasonable simulation of v ariables. This provides a new way for further study on salt- water movement theory. |