Nitrous Oxide Emissions from Ponds in Typical Agricultural Catchment with Intensive Agricultural Activity

被引：0

作者：

Zhang X.-Y. ^{[1
,2
]}

Xiao Q.-T. ^{[2
]}

Xie H. ^{[2
]}

Liu Z.-J. ^{[3
]}

Qiu Y.-G. ^{[2
]}

Luo J.-H. ^{[2
]}

Xu X.-H. ^{[1
]}

Duan H.-T. ^{[2
]}

机构：

[1] Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters（CIC-FEMD）, Nanjing University of Information Science & Technology, Nanjing

[2] Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing

[3] Hunan Climate Center, Changsha

来源：

Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 04期

关键词：

agricultural activity; influencing factors; N[!sub]2[!/sub]O emissions; pond water; spatial-temporal variability;

D O I：

10.13227/j.hjkx.202304223

中图分类号：

学科分类号：

摘要：

The nitrogen cycle of water bodies in agricultural watersheds is closely related to the farmland ecosystem，which will become a significant emission source of atmospheric N2O with increasing agricultural activity. Ponds are an important component of agricultural catchment due to their functions as water storage，domestic sewage receiving，and irrigation. In this study，Tongyang River Catchment，a typical agricultural catchment on the northern part of Chaohu Lake，was selected as the research object. Three different types of landscape ponds（sewage pond，irrigation pond，and storage pond）with a total number of six ponds were selected to investigate the N2O emissions based on continuous field sampling from September 2020 to September 2021. The results showed that the highest N2O emission flux occurred in sewage ponds，followed by the irrigation pond，and the N2O emissions fluxes in the sewage pond and irrigation pond were eight times and four times higher than that in storage ponds［（1. 33±2. 50）μmol·（m2·d）-1］，respectively. Continuous observation showed that N2O emissions in different landscape ponds showed obvious temporal variation，but the factors influencing the N2O emissions varied among ponds. The N2O emissions from sewage ponds and irrigation pond were mainly affected by nitrogen load and precipitation，whereas N2O emissions from ponds away from villages and farms were mainly affected by water temperature. In summary，the ponds acted as significant emission sources of atmospheric N2O emissions，with an annual mean N2O emissions flux of（5. 73 ± 10. 61）μmol·（m2·d）-1. Large exogenous nitrogen load input from the catchment contributed to significant N2O emissions. Clarifying the use and type of ponds is important for estimating N2O emissions from small-scale water bodies in agricultural watersheds. © 2024 Science Press. All rights reserved.

引用

页码：2385 / 2393

页数：8

共 54 条

[1] Tian H Q，, Xu R T，, Canadell J G，, Et al., A comprehensive quantification of global nitrous oxide sources and sinks［J］, Nature, 586, 7828, pp. 248-256, (2020)
[2] Wagner-Riddle C，, Congreves K A，, Abalos D，, Et al., Globally important nitrous oxide emissions from croplands induced by freeze-thaw cycles［J］, Nature Geoscience, 10, 4, pp. 279-283, (2017)
[3] Zhang H L，, Deng Q，, Schadt C W，, Et al., Precipitation and nitrogen application stimulate soil nitrous oxide emission ［J］, Nutrient Cycling in Agroecosystems, 120, 3, pp. 363-378, (2021)
[4] Deng L，, Huang C B，, Kim D G，, Et al., Soil GHG fluxes are altered by N deposition：New data indicate lower N stimulation of the N2O flux and greater stimulation of the calculated C pools［J］, Global Change Biology, 26, 4, pp. 2613-2629, (2020)
[5] Soued C，, Del Giorgio P A，, Maranger R., Nitrous oxide sinks and emissions in boreal aquatic networks in Québec ［J］, Nature Geoscience, 9, 2, pp. 116-120, (2016)
[6] Qin X B，, Li Y，, Goldberg S，, Et al., Assessment of indirect N2O emission factors from agricultural river networks based on long-term study at high temporal resolution［J］, Environmental Science & Technology, 53, 18, pp. 10781-10791, (2019)
[7] Webb J R，, Clough T J, Quayle W C., A review of indirect N2O emission factors from artificial agricultural waters ［J］, Environmental Research Letters, 16, 4, (2021)
[8] Outram F N，, Hiscock K M., Indirect nitrous oxide emissions from surface water bodies in a lowland arable catchment：a significant contribution to agricultural greenhouse gas budgets？［J］, Environmental Science & Technology, 46, 15, pp. 8156-8163, (2012)
[9] Turner P A，, Griffis T J，, Lee X，, Et al., Indirect nitrous oxide emissions from streams within the US Corn Belt scale with stream order［J］, Proceedings of the National Academy of Sciences, 112, 32, pp. 9839-9843, (2015)
[10] Li Y F, Liu H Y, Gao P F，, Et al., Agricultural multi-pond systems and their hydrological processes：a review［J］, Acta Ecologica Sinica, 36, 9, pp. 2482-2489, (2016)

← 1 2 3 4 5 6 →