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生态学杂志 ›› 2021, Vol. 40 ›› Issue (3): 644-653.doi: 10.13292/j.1000-4890.202103.003

• 研究报告 • 上一篇    下一篇

冻融交替对长白山不同林型土壤两种温室气体排放的影响

辛贵民1,赵清竹1,尹航2,李龙1,贺殊敏1,周佩华1,傅民杰*   

  1. 1延边大学农学院, 吉林延吉 133002;2长白山科学研究院, 吉林安图 133613)
  • 出版日期:2021-03-10 发布日期:2021-03-12

Effects of freeze-thaw process on the emission of two greenhouse gases from different forest soils in Changbai Mountain.

XIN Gui-min1, ZHAO Qing-zhu1, YIN Hang2, LI Long1, HE Shu-min1, ZHOU Pei-hua1, FU Min-jie1*   

  1. (1College of Agriculture, Yanbian University, Yanji 133002, Jilin, China; 2Changbai Mountain Scientific Research Institute, Antu 133613, Jilin, China).
  • Online:2021-03-10 Published:2021-03-12

摘要: 以长白山5种林型土壤(硬阔叶林、红松阔叶林、次生白桦林、长白松林和蒙古栎林)为对象,利用原位培养连续取样法研究了冻融过程中5种林型土壤CO2和N2O排放特征及相关机理。结果表明:冻融期5种林型土壤是CO2和N2O的源。次生白桦林和红松阔叶林土壤CO2和N2O的平均通量显著高于其他3种林型。除硬阔叶林外,各林型土壤CO2通量与土壤含水量间存在显著负相关,但不同林型的土壤CO2排放对水分敏感性差异较大;除硬阔叶林外,各林型土壤N2O通量与土壤含水量间存在显著正相关,但水分敏感性因林型而异。5种林型土壤CO2和N2O排放通量均与土壤表层温度呈二次函数关系。

关键词: 冻融交替, 森林土壤, 二氧化碳, 氧化亚氮

Abstract: We examined the emission of CO2 and N2O from soils of five forest types (hardwood broad-leaved forest, Korean pine broad-leaved forest, secondary birch forest, Changbai pine forest and Mongolian oak forest) in the process of freeze-thaw by in situ continuous sampling. The results showed that soils from all the forest types were CO2 and N2O source during freeze-thaw season. The average flux of CO2 and N2O for secondary birch forest and Korean pine broad-leaved forest soils were significantly higher than that of other forest types. Except for the hardwood broad-leaved forest, there was a significant negative correlation between CO2 flux and soil water content in the forest soils. The water sensitivity of soil CO2 emissions varied greatly among different forest types. There was a significant positive correlation between soil N2O flux and soil water content in all forest types except the hardwood broad-leaved forest. The soil CO2 and N2O emission fluxes in five forest types were related to the temperature of surface soils by quadratic function.

Key words: freeze-thaw, forest soil, CO2, N2O.