| 土壤水分波动对高寒草甸生态系统CO_2和N_2O排放的影响 | |
| Alternative Title | Effect of soil moisture fluctuations on CO_2 and N_2O emission in alpine meadow ecosystem |
王瑞1,2; 王平1; 高永恒2 ; 马钢1,2
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| Corresponding Author | 王平 |
| 2018 | |
| Source Publication | 草业科学
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| ISSN | 1001-0629 |
| Volume | 35Issue:2Pages:266-275 |
| Subtype | Article |
| Abstract | 受地形和气候的影响,高寒草地土壤经历着频繁的土壤水分波动过程,为探索土壤水分波动对青藏高原高寒草甸生态系统CO_2和N_2O排放的影响,采用原状土柱模拟土壤由高含水量(60 cm~3·cm~(-3))到低含水量(30 cm~3·cm~(-3))再到高含水量(60 cm~3·cm~(-3))的波动过程,各阶段持续时间相应为38、57和46 d,并以恒定含水量(60 cm~3·cm~(-3))为对照,研究了高寒草甸生态系统CO_2和N_2O的释放量及其与土壤温湿度、土壤铵态氮(NH_4~+ -N) 、硝态氮(NO_3~--N)和可溶性有机碳(DOC)的关系。结果表明,土壤水分波动增加了高寒草甸生态系统CO_2排放通量。在土壤水分波动过程中,CO_2排放通量与土壤温度呈正指数关系;在开始的高含水量阶段,CO_2排放与DOC含量有显著正相关关系(P < 0.05),但在低含水量阶段,相关性不明显(P > 0.05);土壤水分波动显著降低了N_2O的排放(P < 0.05) 。恒湿对照的N_2O通量与其土壤NH_4~+ -N含量呈极显著负相关关系(P < 0.01),土壤水分波动处理的N_2O通量与土壤NH_4~+ -N和NO_3~--N含量相关性均不显著(P > 0.05) 。 |
| Other Abstract | Under the influence of topography and climate,plateau grassland soil experiences frequent soil moisture fluctuations. To explore the influence of soil moisture fluctuations on CO_2 and N_2O emission from alpine meadows in the Qinghai-Tibet Plateau,we used an undisturbed soil column to simulate soil water content fluctuation from a high (60 cm~3·cm~(-3)) to low value (30 cm~3·cm~(-3)),and to a high (60 cm~3·cm~(-3)) again; this duration of each phase was 38,57,and 46 days. A soil column with constant HYPERLINKjavascript:; humidity level (soil humidity 60 cm~3· cm~(-3)) was considered the control. The results showed that: 1) soil moisture fluctuations significantly increased CO_2 emission. A significant relationship was observed between CO_2 emission and soil temperature; additionally,CO_2 emission correlated positively with soil dissolved organic carbon (DOC) concentration in the first high soil-water content phase. 2) Moisture fluctuations significantly decreased N_2O emission. In the control treatment,there was a strong significant negative correlation between N_2O emission and NH_4~+ -N; however,no close relation between N_2O emission and NH_4~+-N level was observed throughout the moisture fluctuation process. |
| Keyword | 高寒草甸生态系统 土壤水分波动 土壤可溶性有机碳 二氧化碳 硝态氮 铵态氮 |
| DOI | 10.11829/j.issn.1001-0629.2016-0241 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:6192755 |
| Citation statistics |
Cited Times:2[CSCD]
[CSCD Record]
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| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/23006 |
| Collection | 山地表生过程与生态调控重点实验室 |
| Affiliation | 1.甘肃农业大学资源与环境学院; 2.中国科学院成都山地灾害与环境研究所 |
| First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Recommended Citation GB/T 7714 | 王瑞,王平,高永恒,等. 土壤水分波动对高寒草甸生态系统CO_2和N_2O排放的影响[J]. 草业科学,2018,35(2):266-275. |
| APA | 王瑞,王平,高永恒,&马钢.(2018).土壤水分波动对高寒草甸生态系统CO_2和N_2O排放的影响.草业科学,35(2),266-275. |
| MLA | 王瑞,et al."土壤水分波动对高寒草甸生态系统CO_2和N_2O排放的影响".草业科学 35.2(2018):266-275. |
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| 土壤水分波动对高寒草甸生态系统CO_2和（1474KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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