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| Analysis of spatial differences and temporal trends of agricultural N2O emissions based on ESDA-R/S |
| Received:April 02, 2018 |
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| KeyWord:agricultural N2O emissions;ESDA;Hurst index;spatial and temporal characteristics;county-level |
| Author Name | Affiliation | E-mail | | HUANG Zhao-chang | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Ornamental Germplasm Resources Innovation & Engineering Application Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | CHEN Si-ming | Ocean College, Minjiang University, Fuzhou 350108, China
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Ornamental Germplasm Resources Innovation & Engineering Application Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | MAO Yan-ling | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Ornamental Germplasm Resources Innovation & Engineering Application Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China | fafum@126.com | | SONG Xing-xing | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | WU Qun | College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | |
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| Abstract: |
| Investigating the spatial and temporal patterns of agricultural N2O emissions in Fujian Province is necessary to formulate effective emission reduction measures and help mitigate the global greenhouse effect. Using agricultural data of Fujian Province from 1983 to 2014, Exploratory Spatial Data Analysis and R/S method were employed to analyze the spatial differences and temporal trends of agricultural N2O emissions in 52 counties across Fujian. The results revealed that there were significant spatial differences in agricultural N2O emissions among Fujian's counties from 1983 to 2014. Over 40% of counties with high agricultural N2O emissions were concentrated in the south of the province and continued to exhibited a persistent growth rate, while 25% of counties with low agricultural N2O emissions were concentrated in the central and northern regions and exhibited a slowing or declining growth rate. In the future, growth trends indicated that there would be an overall increase in agricultural N2O emissions in Fujian; controlling emissions in the southern region was key to slowing or reversing this trend. Our results provide a more complete picture of the spatial differences and temporal trends of agricultural N2O emissions at the county level, and provide crucial data support for the establishment of emission reduction measures in Fujian Province. |
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