AUTHOR=Wei Ziwen , Cheng Yunxiang , Hou Fujiang 

TITLE=Soil organic matter on arid saline-alkali land drives greenhouse gas emissions from artificial and natural grasslands in different directions

JOURNAL=Frontiers in Environmental Science

VOLUME=12

YEAR=2024

URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2024.1338180

DOI=10.3389/fenvs.2024.1338180

ISSN=2296-665X

ABSTRACT=<p>Reducing greenhouse gas (GHG) emissions and mitigating the pace of global warming are crucial to achieving a balance between economic development and ecological protection. However, research on GHG emissions from different types of artificial grasslands is limited. This study aimed to elucidate the dynamics of GHG emission fluxes in three types of artificial grasslands and natural saline meadow grassland (NG). Meteorological and soil data were collected to determine the correlations between GHG fluxes and environmental variables. All grasslands were sources of CO<sub>2</sub> and N<sub>2</sub>O. Artificial grasslands were sinks of CH<sub>4</sub>, whereas NG was a CH<sub>4</sub> source. FCO<sub>2</sub> was the main source of GHGs in grasslands. The average emissions of FCO<sub>2</sub> and FN<sub>2</sub>O in artificial grasslands were higher than those in NG. Soil temperature had a positive effect on GHG emissions in all grasslands and soil organic matter content was the main factor affecting all grassland GHG fluxes.</p>