Reducing methane emission by promoting its oxidation in rhizosphere through nitrogen-induced root growth in paddy fields

Li, Siyu; Chen, Yun; Feng, Yu; Zhang, Yajun; Liu, Kun; Zhuo, Xinxin; Qiu, Yuanyuan; Zhang, Hao; Gu, Junfei; Wang, Weilu; Yang, Jie; Liu, Lijun

doi:10.1007/s11104-022-05360-1

Cited by 21 publications

(6 citation statements)

References 88 publications

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“…As mentioned above, N fertilizer plays a critical role in promoting crop growth and enhancing soil nutrient contents [ 24 , 27 ]. Generally, the variety of crop growth is accompanied by changes in root oxygen secretion, root exudates as well as litterfall [ 10 ]. On one hand, the increased root exudates, residue and crop litterfall with fertilization can be preferentially utilized by soil microorganisms; this increases soil LOC and/or promotes methane production [ 9 , 39 ].…”

Section: Discussionmentioning

confidence: 99%

“…As mentioned above, the varieties in soil organic carbon (SOC), plant biomass and the abundance of microorganisms associated with methane emissions may affect paddy methane emissions under warming [ 3 , 7 ]. Specifically, changes in crop growth are accompanied by changes in root oxygen secretion [ 10 ]. Furthermore, changes of temperature may affect soil carbon turnover and soil physicochemical properties [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…Notably, one factor change may cause the linkage effect of other factors; e.g., increased root oxygen secretion with crop growth can accelerate soil mineralization and promote the copies of methanogens and methanotrophs [ 10 , 15 ]; the response of soil carbon turnover to temperature is also closely related to microorganisms [ 12 ]. Combined with the above analysis, it is not clear which indicator is the key factor affecting methane emissions, especially as the response of paddy CH 4 emission to warming varies with background temperature.…”

Section: Introductionmentioning

confidence: 99%

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Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

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“…Root exudates can not only activate insoluble nutrients in the soil and improve fertilizer efficiency [94], but can also increase the absorption and transport of NO 3…”

Section: Root Secretionmentioning

confidence: 99%

Research Progress in Crop Root Biology and Nitrogen Uptake and Use, with Emphasis on Cereal Crops

Wang

Sun

Cai³

et al. 2023

Agronomy

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The biological characteristics of crop roots are closely related to the efficient utilization of nitrogen and have become a research hotspot in agricultural cultivation and breeding in recent years. The root system and root microbiota play a crucial role in both the basic and the plastic growth and development of plants in response to external environmental changes. Nitrogen is an indispensable nutrient element for crop growth, and the efficient utilization of nitrogen is the key to achieving the high yield and quality of crops and establishing environmentally friendly agricultural production. The nitrogen absorbed and utilized by rice mainly enters the aboveground part of the plant through the root system from within the soil. This process is explored from the perspective of root biology (root morphology, physiological and biochemical characteristics, root growth and development process and regulation, rhizosphere microorganisms, and their symbiotic systems), which is in line with the directions of “less investment, increased production, environmental protection, and sustainable development” in China. Based on the research status in this field at present, this article explored the interaction mechanism between crop root biology and nitrogen absorption and utilization, and looks forward to the future research directions for root biology. This study provides a theoretical basis for reducing nitrogen fertilizer application, optimizing nitrogen-efficient cultivation management techniques, and selecting nitrogen-efficient varieties.

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“…However, large uncertainties exist in the estimates of global inland water CH 4 emissions, partly due to the lack of a clear understanding on the various processes driving CH 4 saturation and emission in aquatic environments. Aerobic methane oxidation (MOX), for example, plays a central role in regulating the global CH 4 budget by biologically mitigating CH 4 emissions from various natural (e.g., wetlands, rivers, lakes, and ocean) and anthropogenic (e.g., rice paddy fields, landfills) sources (King, 1992;Guérin and Abril, 2007;Reeburgh, 2007;Bastviken et al, 2008;Chanton et al, 2009;Chanton et al, 2011;Serrano-Silva et al, 2014;Cai et al, 2016;Sawakuchi et al, 2016;Li et al, 2022). Despite its pivotal role in controlling CH 4 emissions, accurate quantification of MOX is constrained methodologically and often represents one of the largest uncertain components in the budgets of various CH 4 sources.…”

Section: Introductionmentioning

confidence: 99%

Variability and controls of stable carbon isotopic fractionation during aerobic methane oxidation in temperate lakes

Thottathil

Reis²,

Prairie³

2022

Front. Environ. Sci.

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The aerobic oxidation of methane (CH4) by methanotrophic bacteria (MOB) is the major sink of this highly potent greenhouse gas in freshwater environments. Yet, CH4 oxidation is one of the largest uncertain components in predicting the current and future CH4 emissions from these systems. While stable carbon isotopic mass balance is a powerful approach to estimate the extent of CH4 oxidation in situ, its applicability is constrained by the need of a reliable isotopic fractionation factor (αox), which depicts the slower reaction of the heavier stable isotope (13C) during CH4 oxidation. Here we explored the natural variability and the controls of αox across the water column of six temperate lakes using experimental incubation of unamended water samples at different temperatures. We found a large variability of αox (1.004–1.038) with a systematic increase from the surface to the deep layers of lake water columns. Moreover, αox was strongly positively coupled to the abundance of MOB in the γ-proteobacteria class (γ-MOB), which in turn correlated to the concentrations of oxygen and CH4, and to the rates of CH4 oxidation. To enable the applicability in future isotopic mass balance studies, we further developed a general model to predict αox using routinely measured limnological variables. By applying this model to δ13C-CH4 profiles obtained from the study lakes, we show that using a constant αox value in isotopic mass balances can largely misrepresent and undermine patterns of the extent of CH4 oxidation in lakes. Our αox model thus contributes towards more reliable estimations of stable carbon isotope-based quantification of CH4 oxidation and may help to elucidate large scale patterns and drivers of the oxidation-driven mitigation of CH4 emission from lakes.

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Reducing methane emission by promoting its oxidation in rhizosphere through nitrogen-induced root growth in paddy fields

Cited by 21 publications

References 88 publications

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Research Progress in Crop Root Biology and Nitrogen Uptake and Use, with Emphasis on Cereal Crops

Variability and controls of stable carbon isotopic fractionation during aerobic methane oxidation in temperate lakes

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