农业环境科学学报2025，Vol.44Issue(7)：1930-1942,13.DOI:10.11654/jaes.2024-0711
长江三角洲典型小型养殖塘N2O通量时空变化特征及其影响因素
Temporal and spatial variations of N2O flux and their impactor factors in typical small aquaculture ponds in the Yangtze River Delta
摘要
Abstract
In this study,N2O fluxes at the water-air interface were observed by bulk diffusion model in typical small aquaculture ponds in the Yangtze River Delta from May 2017 to May 2021.The temporal and spatial variations of N2O flux and their impact factors were determined.The results showed that N2O flux had diurnal variations with maximum value in the noon or afternoon in the four seasons.The diurnal variation ranges of N2O flux were 11.20～117.28,30.96～150.30,3.77～22.77,4.73～21.74 μmol·m-2·d-1 in the four seasons,respectively.The N2O flux showed a seasonal variation.The value ranged from-0.97 to 217.83 μmol·m-2·d-1,which was high in summer and low in winter.The annual mean N2O flux was 34.86 μmol·m-2·d-1.The diurnal variations of N2O flux were affected by wind speed,air pressure,pH and oxidation-reduction potential(ORP).The diurnal variation of N2O flux in spring was mainly controlled by air pressure,which responded to air pressure change linearly.The diurnal variation of N2O flux in summer,autumn and winter were mainly dominated by wind speed,which increased with wind speed change linearly.The seasonal variation of N2O emission flux was affected by water temperature(20 cm depth),air temperature,air pressure,dissolved oxygen(DO),pH and ORP.The main controlling factor was water temperature.The N2O flux increased with water temperature exponentially.The temperature sensitivity(Q10)was 2.36.Artificial management practices such as feeding,application of chicken manure,and drainage can make N2O flux increase significantly.N2O flux in the area where chicken manure was applied was approximately 1.5 times higher than that in feeding area.During the drainage period,N2O flux from drained pond was about 4 times higher than that from undrained pond.关键词
养殖塘/薄边界层法/N2O通量/时空变化特征/影响因素Key words
aquaculture pond/bulk diffusion model/N2O flux/temporal and spatial variation/impact factor分类
资源环境引用本文复制引用
何洋,张弥,石婕,王娇,谢燕红,贾磊,肖薇,曹畅..长江三角洲典型小型养殖塘N2O通量时空变化特征及其影响因素[J].农业环境科学学报,2025,44(7):1930-1942,13.基金项目
江苏省碳达峰碳中和科技创新专项资金(前沿基础)项目(BK20220020) （前沿基础）
江苏省自然科学基金杰出青年基金项目(BK20220055) （BK20220055）
江苏省"333人才"领军型人才团队项目(BRA2022023) R&D Foundation of Jiangsu Province,China(BK20220020) （BRA2022023）
Jiangsu Natural Science Foundation for Distinguished Young Scholar(BK20220055) （BK20220055）
"333 Project"of Jiangsu Province(BRA2022023) （BRA2022023）
