草地学报 ›› 2023, Vol. 31 ›› Issue (11): 3423-3435.DOI: 10.11733/j.issn.1007-0435.2023.11.021

• 研究论文 • 上一篇    下一篇

水热互作对多年冻土区高寒沼泽草甸土壤温室气体排放的影响

杨文丹1, 赵秋梅1, 翟泰雅2, 何燕2, 毛天旭3, 张涛4   

  1. 1. 贵州大学农学院, 贵州 贵阳 550025;
    2. 贵州民族大学生态环境工程学院, 贵州 贵阳 550025;
    3. 贵州大学林学院, 贵州 贵阳 550025;
    4. 贵州大学新农村发展研究院, 贵州 贵阳 550025
  • 收稿日期:2023-04-10 修回日期:2023-05-20 出版日期:2023-11-15 发布日期:2023-12-01
  • 通讯作者: 张涛,E-mail:zhangtaoeco@outlook.com
  • 作者简介:杨文丹(1998-),女,汉族,贵州遵义人,硕士研究生,主要从事资源利用与植物保护研究,E-mail:wdyang1778457341@163.com
  • 基金资助:
    国家自然科学基金(42061013,41701081);贵州省省级科技计划项目(黔科合基础-ZK[2022]一般146)资助

Effects of Hydrothermal Changes on Soil Greenhouse Gas Emissions from Alpine Swamp Meadow in the Permafrost Region

YANG Wen-dan1, ZHAO Qiu-mei1, ZHAI Tai-ya2, HE Yan2, MAO Tian-xu3, ZHANG Tao4   

  1. 1. College of Agriculture, Guizhou University, Guiyang, Guizhou Province 550025, China;
    2. College of Ecological and Environmental Engineering, Guizhou Minzu University, Guiyang, Guizhou Province 550025, China;
    3. College of Forestry, Guizhou University, Guiyang, Guizhou Province 550025, China;
    4. Institute of New Rural Development, Guizhou University, Guiyang, Guizhou Province 550025, China
  • Received:2023-04-10 Revised:2023-05-20 Online:2023-11-15 Published:2023-12-01

摘要: 为了探究温度和水分变化对多年冻土区高寒沼泽草甸土壤温室气体排放的影响,设置温度5,10和15℃(记作T5,T10和T15)和水分梯度75%,100%,130%土壤持水力(Water holding capacity, WHC, 记作W75, W100和W130)室内交互培养实验。结果表明:各水分处理CO2累积排放量随温度增加而增加,W75T5处理最低(818.59 mg·kg-1),W100T15处理最高(3 420.50 mg·kg-1);W75和W100处理CH4累积排放量无明显规律,W130处理CH4累计排放量随温度增加而增加;W75处理N2O累计排放量随温度增加而降低,W100和W130处理随温度增加先增加后降低。CO2累积排放量与微生物量碳显著负相关,与pH和过氧化氢酶显著正相关;CH4累积排放量与电导率、脲酶显著负相关。温度、水分及其交互作用对全球增温潜势(GWP)影响显著;水热因素和土壤性质共同解释了GWP变异的61.16%,表明水热互作及其驱动的土壤理化性质变化共同影响多年冻土区高寒沼泽草甸温室气体排放。

关键词: 温度, 水分, 青藏高原, 高寒沼泽草甸, 温室气体

Abstract: In order to investigate the effects of temperature and moisture changes on greenhouse gas emission from an alpine meadow in the permafrost region,indoor interactive incubation experiments were conducted with temperatures of 5, 10, and 15°C (denoted as T5, T10, and T15) and water gradient of 75%, 100%, and 130% of soil water holding capacity (WHC, separately W75, W100, and W130). The results showed that the cumulative CO2 emissions increased with the temperature raising at all moisture levels,among which the lowest cumulative CO2 emission occurred from W75 T5 (818.59 mg·kg-1) and the highest from W100 T15 (3 420.50 mg·kg-1). The cumulative CH4 emissions from W75 and W100 showed no obvious pattern with temperature change,while the cumulative soil CH4 emissions from W130 treatment increased with temperature raising. The cumulative N2O emission from W75 decreased with the increment of temperature;but under water treatments of W100 and W130,the cumulative N2O emission increased to the highest in T10 and then decreased in T15. The cumulative CO2 emissions was negatively correlated with microbial carbon and positively with pH value and catalase activity. The cumulative CH4 emission was negatively correlated with conductivity and urease activity. Temperature,moisture and their interactions had a significant effect on the Global Warming Potential (GWP) of all three greenhouse gases. The variance decomposition analysis showed that hydrothermal factors and soil properties explained 61.16% variations of GWP,demonstrating that hydrothermal interaction and its driven changes to soil physicochemical properties could regulate soil greenhouse gas emission in alpine swamp meadow of permafrost region.

Key words: Temperature, Moisture, Qinghai-Tibet Plateau, Alpine swamp meadow, Greenhouse gas

中图分类号: