| Amelioration model of medium saline-alkali soil by leaching with mildly saline groundwater |
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| DOI：10.7606/j.issn.1000-7601.2006.04.35 |
| Key Words: medium saline-alkali soil mildly saline groundwater leaching amelioration model Songnen Plain |
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| Abstract: |
| The effects of leaching with mildly saline groundwater on salinity and crop yield in medium saline-sodic soils were evaluated in a two-year field experiment.When applied with 700 mm and 400 mm leaching water,the electric conductivity(ECe) of all the soils at 0～1.2 m depths decreased to less than 3.0 dS/m,and the sodium absorption ratio(SARe) decreased to less than 13,indicating that the soils were ameliorated completely.The soil salinity changes were not significantly different between 700 mm and 400 mm leaching treatments.The 400 mm leaching quota applied in two years was better than that applied in one year.The sorghum yields of these two leaching treatments were as high as 5 920 kg/hm2 and 5 355 kg/hm2,and the corn yields were as high as 6 639 kg/hm2 and 5 872 kg/hm2,which were much closed to the average yields on local non-saline soils. |
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