Emission Laws and Influence Factors of Greenhouse Gases in Saline-Alkali Paddy Fields

Jie Tang, Shuang Liang, Zhaoyang Li, Hao Zhang, Sining Wang and Nan Zhang
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Jie Tang: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Shuang Liang: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Zhaoyang Li: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Hao Zhang: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Sining Wang: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Nan Zhang: Engineering College of Jilin University, Changchun 130026, China

Sustainability, 2016, vol. 8, issue 2, 1-14

Abstract: The study of greenhouse gas emissions has become a global focus, but few studies have considered saline-alkali paddy fields. Gas samples and saline-alkali soil samples were collected during the green, tillering, booting, heading and grain filling stages. The emission fluxes of CO 2 , CH 4 , and N 2 O as well as the pH, soil soluble salt, available nitrogen, and soil organic carbon contents were detected to reveal the greenhouse gas (GHG) emission laws and influence factors in saline-alkali paddy fields. Overall, GHG emissions of paddy soil during the growing season increased, then decreased, and then increased again and peaked at booting stage. The emission fluxes of CO 2 and CH 4 were observed as having two peaks and a single peak, respectively. Both the total amount of GHG emission and its different components of CO 2 , CH 4 , and N 2 O increased with the increasing reclamation period of paddy fields. A positive correlation was found between the respective emission fluxes of CO2, CH 4 , and N 2 O and the available nitrogen and SOC, whereas a negative correlation was revealed between the fluxes of CO 2 , CH 4 , and N 2 O and soil pH and soil conductivity. The study is beneficial to assessing the impact of paddy reclamation on regional greenhouse gas emissions and is relevant to illustrating the mechanisms concerning the carbon cycle in paddy soils.

Keywords: greenhouse gas; emission law; pH; soil soluble salt; available nitrogen; soil organic carbon; saline-alkali paddy fields; reclaimation period (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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