Effects of Straw Incorporation Years and Water-Saving Irrigation on Greenhouse Gas Emissions from Paddy Fields in Cold Region of Northeast China

Jianyi Huang, Tangzhe Nie (), Tiecheng Li, Peng Chen, Zhongxue Zhang, Shijiang Zhu, Zhongyi Sun and Lihua E
Additional contact information
Jianyi Huang: School of Water Conservancy and Electric Power, Heilongjiang University, Harbin 150006, China
Tangzhe Nie: School of Water Conservancy and Electric Power, Heilongjiang University, Harbin 150006, China
Tiecheng Li: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Peng Chen: College of Agricultural Science and Engineering, Hohai University, Nanjing 210024, China
Zhongxue Zhang: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Shijiang Zhu: College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
Zhongyi Sun: College of Ecology and Environment, Hainan University, Haikou 570208, China
Lihua E: School of Water Conservancy and Electric Power, Heilongjiang University, Harbin 150006, China

Agriculture, 2022, vol. 12, issue 11, 1-15

Abstract: Straw incorporation has a variety of impacts on greenhouse gas (GHG) emissions. However, few studies have focused on the effects of multi-year straw incorporation. In this study, a field experiment was established to study the effects of straw incorporation and water-saving irrigation on GHG emissions in the cold region of Northeast China. The following four treatments were included: (i) controlled irrigation (CI) with 1-year straw incorporation (C1), (ii) controlled irrigation with 5-year straw incorporation (C5), (iii) flooded irrigation (FI) with 1-year straw incorporation (F1), and (iv) flooded irrigation with 5-year straw incorporation (F5). The fluxes of N 2 O, CO 2 , and CH 4 were measured by the static chamber–gas chromatography method, and their global warming potential ( GWP ) and greenhouse gas intensity ( GHGI ) in units of CO 2 -equivalent at the 100-year scale were calculated. The results showed that the 5-year straw incorporation reduced N 2 O emissions but increased CH 4 emissions. Compared with C1 and F1, C5 and F5 reduced N 2 O emissions by 73.1% and 44.9%, respectively, while increasing the CH 4 emissions by 101.7 and 195.8%, respectively. Under different irrigation regimes, CI reduced CH 4 emissions by 50.4–79.7% while increasing CO 2 emissions by 8.2–44.9% compared with FI. The contribution of N 2 O and CO 2 emissions were relatively high at the mature and milk stages, respectively, with a range of 16–54% and 41–52% for the treatments. In contrast, CH 4 emissions were mainly manifested at the tillering stage, with a contribution of 36–58% for the treatments. Affected by higher CH 4 emissions in FI, the GWP of CI was 1.4–47.6% lower than FI. In addition, the yield of CI was 10.0–11.5% higher than FI, which resulted in a GHGI of 11.5–52.4% lower than FI, with C5 being the lowest. The irrigation regime of CI combined with 5-year straw incorporation was an effective agronomic measure to increase yield and reduce GHG emissions from paddy fields in the cold region of Northeast China.

Keywords: paddy fields; greenhouse gas; straw incorporation; irrigation regimes (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/12/11/1878/pdf (application/pdf)
https://www.mdpi.com/2077-0472/12/11/1878/ (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:jagris:v:12:y:2022:i:11:p:1878-:d:967285

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

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