Wang Li-qin, Qi Yu-chun, Dong Yun-she, Peng Qin, Guo Shu-fang, He Yun-long, Yan Zhong-qing
Ying Yong Sheng Tai Xue Bao. 2015 Nov;26(11):3532-44.
As a widespread natural phenomenon in the soil of middle and high latitude as well as high altitude, freeze-thawing cycles have a great influence on the nitrogen cycle of terrestrial ecosystem in non-growing season. Freeze-thawing cycles can alter the physicochemical and biological properties of the soil, which thereby affect the migration and transformation of soil nitrogen. The impacts of freeze-thawing cycles on key processes of nitrogen cycle in terrestrial ecosystem found in available studies remain inconsistent, the mechanism is still not clear, and the research methods also need to be further explored and innovated. So it is necessary to sum up and analyze the existing achievements in order to better understand the processes of soil nitrogen cycle subjected to freeze-thawing cycles. This paper reviewed the research progress in China and abroad about the effects and mechanisms of freeze-thawing cycles on key processes of nitrogen cycle in terrestrial ecosystem, including mineralization, immobilization, nitrification and denitrification, N leakage and gaseous loss, and analyzed the deficiencies of extant research. The possible key research topics that should be urgently paid more attention to in the future were also discussed.
作为中高纬度以及高海拔地区土壤中广泛存在的自然现象，冻融循环对陆地生态系统非生长季的氮循环有很大影响。冻融循环会改变土壤的物理化学和生物学性质，进而影响土壤氮的迁移和转化。现有研究中关于冻融循环对陆地生态系统氮循环关键过程的影响仍不一致，机制尚不明确，研究方法也有待进一步探索和创新。因此，有必要总结分析现有成果，以便更好地理解受冻融循环影响的土壤氮循环过程。本文综述了国内外关于冻融循环对陆地生态系统氮循环关键过程（包括矿化、固持、硝化和反硝化、氮淋失和气态损失）的影响及机制的研究进展，并分析了现有研究的不足。还讨论了未来应亟待更多关注的可能关键研究课题。
