Technical Model of Comprehensive Management of Saline-alkali Land in Songnen Plain

The saline alkali land in Songnen Plain, as one of the three major concentration areas of soda saline alkali land in the world, seriously restricts the local agricultural development. Due to the content of Na2CO3 and NaHCO3 is higher than normal cultivated soil, the soil pH value is higher and the soil porosity is lower, which eventually leads to the gradual degradation of the soil.

Technical Model

Technical model for efficient desalination and ecological treatment of saline-alkali land by reshaping soil structure. It is comprehensively considered that the soluble salts of saline-alkali land in Songnen Plain are mainly Na2CO3 and NaHCO3, with biological-based amendment as the technical core, technical integration and matching are carried out to establish an engineering and technical model for rapid desalination and ecological restoration of heavy saline-alkali land. 

Technology Principle

Through multiple functional groups in its structure and multiple dispersed saline-alkali soil particle colloids at the same time, bio-based amendment form the action mechanism of water-stable aggregate structure by winding, wrapping, adsorption and even chemical bonds, and reshape the soil structure. as a result, the porosity and desalination efficiency of soil are greatly improved. At the same time, through the efficient replacement of Ca/Zn for the basic action mechanism of sodium ions adsorbed on soil particles, the alkalinity was reduced from 80% to 20%, the soil salt content was reduced to 3 ‰.

Key Technical Points

1. Exploring the characteristics of obstacle factors in Saline-Alkali soil

2. Application of new bio-based improver, slow and controlled release fertilizer and seed treatment agent

3. Integrated field management measures

4. Create an industrial chain

Technical effect

The results of typical cases show that the soil desalination efficiency is increased by 13 times, the alkalinity is reduced from 80% to 20%, the total salt content is reduced to 3 ‰, and the crop yield is increased by 50% to 200%.

Related References:

1. Technical Model of Moderate Salinized Cultivated Land Improvement in Ordos, Inner Mongolia

http://www.wfpchinacoe.net/2022-09/15/content_78420529.shtml

2. Technical Model of Salinized Soil Improvement in Shandong Province

http://www.wfpchinacoe.net/2022-09/15/content_78420702.shtml

3. Technical Model of Salt Suppression of Green Manure Cultivation in Pingyao County, Jinzhong City, Shanxi Province

http://www.wfpchinacoe.net/2022-09/15/content_78420651.shtml

4. Mild Saline-alkali Land Management Model in Xinrong District, Datong City, Shanxi Province

http://www.wfpchinacoe.net/2022-09/15/content_78420619.shtml

5. Technical Model of Comprehensive Management of Saline - alkali Land in Ningxia

http://www.wfpchinacoe.net/2022-09/15/content_78420736.shtml