| Author Name | Affiliation | | ZHAO Jun | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
3. Liaoning Key Laboratory of Basin Pollution Control, Liaoning Academy of Environmental Science, Shenyang 110031, China | | ZHANG Wei | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
3. Liaoning Key Laboratory of Basin Pollution Control, Liaoning Academy of Environmental Science, Shenyang 110031, China | | ZHANG Jie | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China | | FENG Yu-jie | State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China |
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| Abstract: |
| The salt-resistant nitrogen-fixing cyanobacteria 888 was experimentally applied to the reclamation of saline and alkali soil in Songnen Plain in China. The pH, electrical conductivity (EC) and sodium adsorption ratio (SAR) of different saline soils were studied and compared. Results show that different saline soils exhibit various physico-chemical properties. Saline-sodic soils in Songnen Plain are ameliorated by using nitrogen-fixing blue-green algae 888 in the experiment. It is indicated that cyanobacteria 888 can grow in saline and alkaline soils, and the conditions favorable for its growth are soil moisture of 50% and dry algae inoculation at 0.03 mg/cm2. The main actions of nitrogen-fixing cyanobacteria are keeping the adsorbability of rubber sheath for sodium, increasing the organic matter content of the soils and decreasing the pH and the degree of salinity in the soils. But the arid climate and soil depth are the main factors that limit the restoration of saline and alkaline soils. |
| Key words: saline alkaline soils Songnen Plain nitrogen-fixing cyanobacteria ecological recovery adsorbability algal crust |
| DOI：10.11916/j.issn.1005-9113.2010.01.007 |
| Clc Number:S156.4 |
| Fund: |
