Abstract:

There are many types and widely distribution of saline-alkali soils with largely area in China, which also have a wide range of potential applications in future. Since 1973, numerous saline-alkali land treatment technological innovations and ecological projects had been carried out in Quzhou County, Hebei Province, thus the areas with severe saline-alkali obstacle had been decreasing, but in some areas secondary salinization were increasing due to water resources restriction in recent years. Although China had made great progress in basic research, management technology development and ecological utilization of water and salt transport laws in saline-alkali land since the 1980 s, there was still a lack of systematic and integrated management and utilization system. There were many shortcomings, such as low technology maturity, imperfect engineering measures, insufficient post-maintenance, basic supporting construction projects of farmland and national industries disconnection and so on, which led to technology demonstration and promotion difficulties, and relevant enterprises with lower participation enthusiasm. Considering above issues, we summarized the formation mechanism, ecological management strategies, technology system construction and the development trends in future of saline-alkali soils, which could be useful for theory and key technology breakthroughs of water-soil-biological resources with high efficient utilization in saline-alkali lands, and improving the construction technology supporting system, in order to establish a virtuous circle of saline-alkali land ecology with win-win ecological, economic and social benefits.

Key words: saline-alkali soils, ecological management, integrated utilization, ecological industry