|
水位波动对蒲草湿地土壤碳排放的影响研究
|
Abstract:
为了研究黄河中游水位波动对蒲草湿地土壤碳排放的影响,利用室内培养法分析不同水位变化后的CO2排放速率。结果表明:低水位水平下蒲草湿地土壤CO2排放速率变化于0~0.035 mmol·m?2·h?1,平均水平为0.017 mmol·m?2·h?1。高水位下蒲草湿地土壤CO2排放速率变化于0.005~0.035 mmol·m?2·h?1,平均水平为0.020 mmol·m?2·h?1。低水平水位下土壤CO2排放速率波动幅度大于高水平状态。水位变化对蒲草湿地土壤CO2排放速率的影响与土壤、植被的环境适应过程以及排放环境紧密相关。
In order to study the influence of water level fluctuation in the middle reaches of the Yellow River on soil carbon emission in cattail (Typha angustifolia) wetland, the CO2 emission rate of different water level changes was collected by static alkaline absorption method. The results showed that under low water levels, the CO2 emission rate of soil in cattail wetland varied from 0 to 0.035 mmol·m?2·h?1, with an average level of 0.017 mmol·m?2·h?1. Under high water level, the CO2 emission rate of soil in cattail wetland varied from 0.005 to 0.035 mmol·m?2·h?1, with an average level of 0.020 mmol·m?2·h?1. The fluctuation amplitude of soil CO2 emission rate under low-level water level was greater than that under high-level state. The effect of water level changes on soil CO2 emission rate in cattail wetland is closely related to the environmental adaptation process of soil and vegetation and the emission environment.
[1] | 李永涛, 杜振宇, 等. 黄河三角洲自然保护区湿地生态服务功能价值评估[J]. 海洋环境科学, 2019, 38(5): 761-768. |
[2] | 吕海波, 谢恒星. 黄河中游芦苇群落土壤CO2排放及其影响因素[J]. 人民黄河, 2018, 40(1): 62-65. |
[3] | 李新鸽. 模拟降雨量变化对黄河三角洲滨海湿地土壤碳排放的影响[D]: [硕士学位论文]. 开封: 河南大学, 2019. |
[4] | 胡天军, 张苗. 黄河中游“揭河底”冲刷机理分析[J]. 人民黄河, 2017, 39(3): 14-16. |
[5] | 侯翠翠. 水文条件变化对三江平原沼泽湿地土壤碳蓄积的影响[D]: [博士学位论文]. 北京: 中国科学院大学, 2012. |
[6] | 刘敏, 金会军, 罗栋梁, 等. 青藏高原土壤碳排放研究进展[J]. 冰川冻土, 2015, 37(6): 1544-1554. |
[7] | 李晓晴. 乌江洪家渡水库消落带土壤和植被淹水后碳氮释放量研究[D]: [硕士学位论文]. 拉萨: 西藏大学, 2021. |
[8] | ZHANG, Y. J., GUO, S. L., ZHAO, M., et al. Soil moisture influence on the interannual variation in temperature sensitivity of soil organic carbon mineralization in the Loess Platea. Biogeosciences, 2015, 12(11): 3655-3664. https://doi.org/10.5194/bg-12-3655-2015 |
[9] | BIRCH, H. F. The effect of soil drying on humus decomposition and nitrogen availability. Plant and Soil, 1958(10): 9-31. https://doi.org/10.1007/bf01343734 |
[10] | 李冰, 朱湾湾, 韩翠, 等. 降水量变化下荒漠草原土壤呼吸及其影响因素[J]. 植物生态学报, 2023, 47(9): 1310-1321. |