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

doi:10.13292/j.1000-4890.202103.003

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

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-jie^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/Abstract

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.

辛贵民, 赵清竹, 尹航, 李龙, 贺殊敏, 周佩华, 傅民杰. 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[J]. 生态学杂志, 2021, 40(3): 644-653.

XIN Gui-min, ZHAO Qing-zhu, YIN Hang,  LI Long, HE Shu-min, ZHOU Pei-hua, FU Min-jie. Effects of freeze-thaw process on the emission of two greenhouse gases from different forest soils in Changbai Mountain.[J]. Chinese Journal of Ecology, 2021, 40(3): 644-653.

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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

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

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