Impact of tillage management on the short- and long-term soil carbon dioxide emissions in the dryland of Loess Plateau in China

Soil carbon dioxide (CO2) emission from agricultural areas is a complex phenomenon with high temporal and spatial variability. Tillage practices can affect drivers of CO2 production and therefore influence emissions by soils. However, the impact of tillage management on CO2 emissions from soil is un...

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Bibliographic Details
Published in:Geoderma 2017-12, Vol.307, p.38-45
Main Authors: Dong, Wenyi, Liu, Enke, Wang, Jianbo, Yan, Changrong, Li, Juan, Zhang, Yanqing
Format: Article
Language:English
Subjects:
CO2 emissions
Conventional-tillage
Loess Plateau
No-tillage
Straw mulching
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Summary:Soil carbon dioxide (CO2) emission from agricultural areas is a complex phenomenon with high temporal and spatial variability. Tillage practices can affect drivers of CO2 production and therefore influence emissions by soils. However, the impact of tillage management on CO2 emissions from soil is uncertain due to specific climate and soil characteristics. A field experiment was initiated in 1992 in Shanxi, China including the no-tillage plots with straw mulching (NT) and conventional-tillage (CT) treatment. In 2012, another treatment (NT0) was conducted during which the straw was not returned to the plots when the winter wheat harvested. The CO2 emissions, soil temperatures and soil moisture content were measured during the fallow and wheat-growing periods from 2013 to 2015. Results showed that the rate of CO2 emissions was significantly higher immediately after tillage operation in the CT treatment. The annual CO2 emission rate in the NT treatment was significantly greater than that in the CT and NT0 treatments (P
ISSN:0016-7061
1872-6259
DOI:10.1016/j.geoderma.2017.07.036