Abstract: Soda_solonchak in the inland of northeast China is one of the difficultly ameliorate soil types and further improvement study for cultivation of the dry crop is still rare. On condition of cultivating corn, The field experiments of applying good peat to ameliorate the soil were carried out. The results showed that applying more peat can obviously lower bad physical and chemical property of the soil such as soluble salt content, pH_value, high alkalinity etc. In the meantime, soil fertility, especially the content of organic matter, nitrogen and phosphorus in agric horizon had notably increased. Correspondingly, production of the cultivated corn in the tests reached 5.6-6.8 tons per hectare, 1.3-1.8 times as many as the original one.

Key words: ecological conservation, ecosystem, ecosystem service, systematic conservation planning.