Optimal drainage timing for mitigating methane emissions from rice paddy fields

Souza, Rodolfo; Yin, Jun; Calabrese, Salvatore

doi:10.1016/j.geoderma.2021.114986

Cited by 26 publications

(8 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consistent with most studies, paddy CH 4 emissions were mainly concentrated in the early growing period prior to midseason aeration ( Figure 1 ). The emitting pattern highlights the critical role of soil moisture and the related soil EH (soil redox potential) in paddy CH 4 emissions [ 35 , 36 , 37 ]. Generally, the variety of soil EH is a key factor affecting methane production in flooded paddy soils with ~−150 mV as the cutoff value [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

View full text Add to dashboard Cite

Introduction: This study aimed to assess the influence of experimental warming and fertilization on rice yield and paddy methane emissions. Methods: A free-air temperature increase system was used for the experimental warming treatment (ET), while the control treatment used ambient temperature (AC). Each treatment contained two fertilization strategies, (i) normal fertilization with N, P and K fertilizers (CN) and (ii) without N fertilizer input (CK). Results: The yield was remarkably dictated by fertilization (p < 0.01), but not warming. Its value with CN treatment increased by 76.24% compared to CK. Also, the interactive effect of warming and fertilization on CH4 emissions was insignificant. The seasonal emissions from warming increased by 36.93% compared to AC, while the values under CN treatment increased by 79.92% compared to CK. Accordingly, the ET-CN treatment obtained the highest CH4 emissions (178.08 kg ha−1), notably higher than the other treatments. Also, the results showed that soil fertility is the main driver affecting CH4 emissions rather than soil microorganisms. Conclusions: Fertilization aggravates the increasing effect of warming on paddy methane emissions. It is a daunting task to optimize fertilization to ensure yield and reduce methane emissions amid global warming.

show abstract

Section: Discussionmentioning

confidence: 99%

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

View full text Add to dashboard Cite

show abstract

“…This is because flooding blocks oxygen from entering the soil, creating a conducive environment for methaneproducing bacteria [129]. By reducing flooding, bacterial methane production is reduced, leading to a decrease in methane emissions [44,45] although it can lead to increases in nitrous oxide emissions [131]. Better managing rice straw (i.e.…”

Section: Alternative Rice Cultivation Methodsmentioning

confidence: 99%

Achieving net-zero emissions in agriculture: a review

Rosa

Gabrielli

2023

Environ. Res. Lett.

View full text Add to dashboard Cite

Agriculture accounts for 12% of global annual greenhouse gas (GHG) emissions (7.1 Gt CO2 equivalent), primarily through non-CO2 emissions, namely methane (54%), nitrous oxide (28%), and carbon dioxide (18%). Thus, agriculture contributes significantly to climate change and is significantly impacted by its consequences. Here, we present a review of technologies and innovations for reducing GHG emissions in agriculture. These include decarbonizing on-farm energy use, adopting nitrogen fertilizers management technologies, alternative rice cultivation methods, and feeding and breeding technologies for reducing enteric methane. Combined, all these measures can reduce agricultural GHG emissions by up to 45%. However, residual emissions of 3.8 Gt CO2 equivalent per year will require offsets from carbon dioxide removal technologies to make agriculture net-zero. Bioenergy with carbon capture and storage and enhanced rock weathering are particularly promising techniques, as they can be implemented within agriculture and result in permanent carbon sequestration. While net-zero technologies are technically available, they come with a price premium over the status quo and have limited adoption. Further research and development are needed to make such technologies more affordable and scalable and understand their synergies and wider socio-environmental impacts. With support and incentives, agriculture can transition from a significant emitter to a carbon sink. This study may serve as a blueprint to identify areas where further research and investments are needed to support and accelerate a transition to net-zero emissions agriculture.

show abstract

“…61 In many cases, other technologies such as mid-season drainage and intermittent irrigation have also been shown to reduce CH 4 emissions from water-flooded fields. 63 , 64 …”

Section: Sectoral Emissions Mitigationmentioning

confidence: 99%

“…75 As for soil CH 4 emissions, as mentioned before, CH 4 mitigation techniques like intermittent irrigation and mid-season drainage are practiced in India and China, respectively. 63 , 64 Although these techniques can increase N 2 O emissions from soils, prevention of excess fertilizer usage can still result in net benefits.…”

Section: Sectoral Emissions Mitigationmentioning

confidence: 99%