Project leader: Han Jichang

Project source: Public welfare industry scientific research project of the Ministry of Land and Resources

Project funding: 6.35 million yuan

Research content:

1) Research on the ecological effect of sand fixation in the Mu Us Sandy Land with sand and piscite sandstone composite soil；

2) Research on water storage performance and water resource support capacity evaluation of arsenic sandstone and sand composite soil；

3) Research on the stability and sustainable utilization of arsenic sandstone and sand composite soil；

4) Impact analysis and engineering demonstration of comprehensive development of Mu Us Sandy Land

Results obtained:

Analysis of the microstructure and sand fixation mechanism of arsenic sandstone and sand composite soil，The sand-fixing effect of composite soil is clarified；Proposed a sustainable utilization plan of composite soil guided by sand fixation；Proven the water storage performance of composite soil；Developed a water-saving irrigation system for typical crops，Constructed a water-saving technology system for agricultural development and utilization in Mu Us Sandy Land；Established a sandy agricultural water dafabet mobile loginresources carrying capacity model based on water resources constraints；Explored the stability of arsenic sandstone and sand composite soil，Proposed corresponding control technology；Developed a water and fertilizer management system for typical crops on compound soil；Compiled the "Technical Specifications for Compound Soil Formation of Arsenic Sandstone and Sand for Land Reconstruction Engineering" (DB6-T 1088-2017)；Developed a decision support system for Mu Us Sandy Land development。The results have great practical significance for the ecological improvement of sandy land and the utilization of arsenic sandstone resources。