关键词: 宁南山区, 苜蓿, 土壤有机碳官能团, 稳定性

Abstract: Ozone (O₃) is recognized as one of the most important air pollutants. At present, the worldwide average tropospheric O₃ concentration has been increased from an estimated preindustrial level of 38 nl·L^-1 (25-45 nl·L^-1, 8h summer seasonal average) to approximately 50 nl·L^-1 in 2000, and to 80 nl·L^-1 by 2100 based on most pessimistic projections. Oryza sativa L. (rice) is the most important grain crop in the world, and thus, to correctly evaluate how the elevated near-surface layer O₃ concentration will affect the growth and development of rice is of great significance. This paper reviewed the chamber (including closed and open top chamber)based studies about the effects of atmospheric ozone enrichment on the rice visible injury symptoms, photosynthesis, water relationship, phenology, dry matter production and allocation, leaf membrane protective system, and grain yield and its components. Further research directions in this field were discussed.

Key words: alfalfa, soil organic carbon functional groups, stability, hilly south region of Ningxia.