The Emissions of Carbon Dioxide, Methane, and Nitrous Oxide during Winter without Cultivation in Local Saline-Alkali Rice and Maize Fields in Northeast China

Hao Zhang, Jie Tang, Shuang Liang, Zhaoyang Li, Ping Yang, Jingjing Wang and Sining Wang
Additional contact information
Hao Zhang: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, China
Jie Tang: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, China
Shuang Liang: Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China
Zhaoyang Li: College of Environment and Resources, Jilin University, Changchun 130012, China
Ping Yang: College of Environment and Resources, Jilin University, Changchun 130012, China
Jingjing Wang: College of Environment and Resources, Jilin University, Changchun 130012, China
Sining Wang: College of Environment and Resources, Jilin University, Changchun 130012, China

Sustainability, 2017, vol. 9, issue 10, 1-16

Abstract: Agricultural ecosystems are important contributors to atmospheric greenhouse gasses (GHGs); however, in situ winter emission data in saline-alkali fields are scarce. Gas samples were collected during different periods, from three rice (R1–R3) and three maize (M1–M3) fields with different soil pH levels and salinity conditions. Carbon dioxide (CO 2 ) emissions in the rice and maize fields decreased with decreasing temperature during the freezing period and increased with the rising temperature during the thawing period, with the majority of winter CO 2 emissions occurring during these two periods. Peaks in methane (CH 4 ) emissions were observed during the freezing period in the rice fields and during the snow-melting period in the rice and maize fields. CH 4 emissions in the rice fields and CH 4 uptake rates in the maize fields were significantly ( P < 0.05) related to surface soil temperature. Nitrous oxide (N 2 O) emissions remained relatively low, except for during the peaks observed during the snow-melting period in both the rice and maize fields, leading to the high GHG contribution of the snow-melting period throughout the winter. Higher pH and salinity conditions consistently resulted in lower CO 2 , CH 4 , and N 2 O emissions, CH 4 uptake, and lower global warming potential (GWP). These results can contribute to the assessment of the GWP during winter in saline-alkali regions.

Keywords: greenhouse gas; saline-alkali field; rice field; maize field; seasonal freeze-thaw (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/2071-1050/9/10/1916/pdf (application/pdf)
https://www.mdpi.com/2071-1050/9/10/1916/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:9:y:2017:i:10:p:1916-:d:116008

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().