scholarly journals Effects of Straw Incorporation Time on Rice Yield and Methane Emissions from Sandy Loam Paddy Fields

2019 ◽  
Vol 64 (2) ◽  
pp. 213-218
Author(s):  
Deogratius LUYIMA ◽  
Hyun–Cheol JEONG ◽  
Jae–Han LEE ◽  
Su–Hun KIM ◽  
Yoshiyuki SHINOGI ◽  
...  
Keyword(s):  
Rice Yield ◽  
Sandy Loam ◽  
Methane Emissions ◽  
Paddy Fields ◽  
Straw Incorporation

scholarly journals Effects of Biochar Amendment on CO2 Emissions from Paddy Fields under Water-Saving Irrigation

2018 ◽  
Vol 15 (11) ◽  
pp. 2580 ◽  
Author(s):  
Shihong Yang ◽  
Zewei Jiang ◽  
Xiao Sun ◽  
Jie Ding ◽  
Junzeng Xu
Keyword(s):  
Co2 Emissions ◽  
Rice Yield ◽  
Rice Paddy ◽  
C Sequestration ◽  
Sensitivity Coefficient ◽  
Water Saving ◽  
Paddy Fields ◽  
Flood Irrigation ◽  
Controlled Irrigation ◽  
Biochar Amendment

The role of carbon pool of biochar as a method of long-term C sequestration in global warming mitigation is unclear. A two-year field study was conducted to investigate the seasonal variations of CO2 emissions from water-saving irrigation paddy fields in response to biochar amendment and irrigation patterns. Three biochar treatments under water-saving irrigation and one biochar treatment under flooding irrigation were studied, and the application rates were 0, 20, 40, and 40 t ha−1 and labeled as CI + NB (controlled irrigation and none biochar added), CI + MB (controlled irrigation and medium biochar added), CI + HB (controlled irrigation and high biochar added), and FI + HB (flood irrigation and high biochar added), respectively. Results showed that biochar application at medium rates (20 t ha−1) decreased CO2 emissions by 1.64–8.83% in rice paddy fields under water-saving irrigation, compared with the non-amendment treatment. However, the CO2 emissions from paddy fields increased by 4.39–5.43% in the CI + HB treatment, compared with CI + NB. Furthermore, the mean CO2 emissions from paddy fields under water-saving irrigation decreased by 2.22% compared with flood irrigation under the same amount of biochar application (40 t ha−1). Biochar amendment increased rice yield and water use efficiency by 9.35–36.30% and 15.1–42.5%, respectively, when combined with water-saving irrigation. The CO2 emissions were reduced in the CI + MB treatment, which then increased rice yield. The CO2 emissions from paddy fields were positively correlated with temperature. The highest value of the temperature sensitivity coefficient (Q10) was derived for the CI + MB treatment. The Q10 was higher under water-saving irrigation compared with flooding irrigation.

Groundwater impact on methane emissions from flooded paddy fields

2015 ◽  
Vol 83 ◽  
pp. 340-350 ◽  
Author(s):  
A. Rizzo ◽  
F. Boano ◽  
R. Revelli ◽  
L. Ridolfi
Keyword(s):  
Methane Emissions ◽  
Paddy Fields

Methane emissions from a rice agroecosystem in South China: Effects of water regime, straw incorporation and nitrogen fertilizer

2012 ◽  
Vol 93 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Jinyang Wang ◽  
Xiaolin Zhang ◽  
Zhengqin Xiong ◽  
M. A. K. Khalil ◽  
Xu Zhao ◽  
...  
Keyword(s):  
South China ◽  
Nitrogen Fertilizer ◽  
Water Regime ◽  
Methane Emissions ◽  
Straw Incorporation

Effects of Soil Microbes on Methane Emissions from Paddy Fields under Varying Soil Oxygen Conditions

2018 ◽  
Vol 110 (5) ◽  
pp. 1738-1747
Author(s):  
Xu Chunmei ◽  
Chen Liping ◽  
Chen Song ◽  
Chu Guang ◽  
Zhang Xiufu ◽  
...  
Keyword(s):  
Soil Microbes ◽  
Methane Emissions ◽  
Paddy Fields ◽  
Soil Oxygen ◽  
Oxygen Conditions
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