Abstract: Yinchuan City is a typical oasis area in arid and semi-arid region of Northwest China, and its lake wetland is a kind of most characteristic and significant ecological resources. By the methods of market price, shadow price, substitute expense, expenditure, carbon tax, outcome reference, and shadow engineering, etc., the lake wetland ecosystem services of the city were evaluated. The results showed that this ecosystem provided a total of 130 288×10⁴ yuan services per year, among which, the service of material production was the largest (54 765×10⁴ yuan), followed by that of climatic regulation (25 851×10⁴ yuan), biological diversity (20 000×10⁴ yuan), recreation (9 661×10⁴ yuan), teaching and scientific research (7 460×10⁴ yuan), water conservation and flood and drought control (5 360×10⁴ yuan), habitat (5 000×10⁴ yuan), water supply (1 889×10⁴ yuan), and water purification and environmental landscaping (302×10⁴ yuan). Therefore, in the economic development and urban expansion of Yinchuan City, a scientific utilization and protection of its wetland resources should be taken, based on the consideration of whole ecosystem.

Key words: Fungal biocontrol agents, Xero-tolerant physiology, Water activity regulation, Formulation enhancement, Microbial control