Investigation on Temporal Variation in Methane Emission from Different Rice Cultivars under the Influence of Weeds

Tyagi, Larisha; Verma, A. K.; Singh, Sunil Kumar

doi:10.1023/b:emas.0000016793.13260.6e

Cited by 6 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Factors like parential metrial, redox state, fertilization level, pesticide application, mineralogy, rice cultivar, and growth stage may also influence the geography of the microbial community and DOM [ 29 , 48 – 53 ]. In submerged paddy soil, rice aerenchyma enables the transport of atmospheric O 2 to the roots [ 54 ], influencing soil redox states [ 55 ]; moreover, rice straw and stubble are assumed to provide substrates for microbial activity in the early growth stage, while exudates become more important during late tillering and ripening [ 56 , 57 ]. Therefore, the effect of the rice plant on the soil microbial community largely depends on the plants growth stage.…”

Section: Discussionmentioning

confidence: 99%

The chemodiversity of paddy soil dissolved organic matter correlates with microbial community at continental scales

Li¹,

Wang²,

Wang³

et al. 2018

Microbiome

149

View full text Add to dashboard Cite

BackgroundPaddy soil dissolved organic matter (DOM) represents a major hotspot for soil biogeochemistry, yet we know little about its chemodiversity let alone the microbial community that shapes it. Here, we leveraged ultrahigh-resolution mass spectrometry, amplicon, and metagenomic sequencing to characterize the molecular distribution of DOM and the taxonomic and functional microbial diversity in paddy soils across China. We hypothesized that variances in microbial community significantly associate with changes in soil DOM molecular composition.ResultsWe report that both microbial and DOM profiles revealed geographic patterns that were associated with variation in mean monthly precipitation, mean annual temperature, and pH. DOM molecular diversity was significantly correlated with microbial taxonomic diversity. An increase in DOM molecules categorized as peptides, carbohydrates, and unsaturated aliphatics, and a decrease in those belonging to polyphenolics and polycyclic aromatics, significantly correlated with proportional changes in some of the microbial taxa, such as Syntrophobacterales, Thermoleophilia, Geobacter, Spirochaeta, Gaiella, and Defluviicoccus. DOM composition was also associated with the relative abundances of the microbial metabolic pathways, such as anaerobic carbon fixation, glycolysis, lignolysis, fermentation, and methanogenesis.ConclusionsOur study demonstrates the continental-scale distribution of DOM is significantly correlated with the taxonomic profile and metabolic potential of the rice paddy microbiome. Abiotic factors that have a distinct effect on community structure can also influence the chemodiversity of DOM and vice versa. Deciphering these associations and the underlying mechanisms can precipitate understanding of the complex ecology of paddy soils, as well as help assess the effects of human activities on biogeochemistry and greenhouse gas emissions in paddy soils.Electronic supplementary materialThe online version of this article (10.1186/s40168-018-0561-x) contains supplementary material, which is available to authorized users.

show abstract

Section: Discussionmentioning

confidence: 99%

The chemodiversity of paddy soil dissolved organic matter correlates with microbial community at continental scales

Li¹,

Wang²,

Wang³

et al. 2018

Microbiome

149

View full text Add to dashboard Cite

show abstract

“…Rice that is grown in submerged paddy soils form aerenchyma which enable the transport of atmospheric O 2 to the roots (Armstrong, 1971, Begg et al, 1994, where a higher redox potential (Flessa and Fischer, 1992;Tyagi et al, 2004) mediates the detoxification of Mn 4+ , Fe 2+ by oxidation and results in the precipitation of Mn and Fe oxides in the root apoplast, which is visible as so-called plaque at the root surface (Trolldenier, 1988). The formation of these plaques can restrict the acquisition of phytotoxic elements such as Cu (Greipsson (1994), Ni (Greipsson, 1995), Cd (Lui et al, 2008) and As by rice (Bravin et al, 2008;Liu et al, 2005).…”

Section: Redox Cycling and Ph Conditionsmentioning

confidence: 99%

Biogeochemistry of paddy soils

et al. 2010

View full text Add to dashboard Cite

“…Our experimental results showed that malic, citric, and succinic acid were positively correlated with CH 4 emission fluxes (Table 3), and the SEM showed that organic acids directly and positively affected CH 4 emission fluxes (Figure 6). This may be because organic acids are easily decomposed into methanogen substrates, which promotes CH 4 production [50]. Organic acids are recognized as phytotoxins in anaerobic soils.…”

Section: Effect Of Organic Acids On Ch 4 Emissionsmentioning

confidence: 99%

Effect and Mechanism of Root Characteristics of Different Rice Varieties on Methane Emissions

Qi,

Guan,

Zhang

et al. 2024

Agronomy

View full text Add to dashboard Cite

Methane (CH4), which is an important component of the greenhouse gases from paddy ecosystems, is a major contributor to climate change. CH4 emissions from paddy ecosystems are closely related to the rice root system; however, how the rice root system affects CH4 emissions remains unclear. We conducted a field experiment in 2023 at the Heping Irrigation District Rice Irrigation Experiment Station in Qing’an County, Heilongjiang Province. The field experiment used five local rice varieties with similar fertility periods to observe rice root morphology and physiology indexes, CH4 emission fluxes, and cumulative CH4 emissions. A structural equation model (SEM) was established to investigate the effects of root characteristics on the CH4 emissions from rice and understand the potential mechanisms of these effects. The results showed that the seasonal patterns of CH4 emission fluxes were similar in different rice varieties, and that, during the tillering to heading–flowering stages, the cumulative CH4 emissions accounted for 89.8–92.6% of the total cumulative CH4 emissions of rice. Significant negative correlations were observed between CH4 emission fluxes and root volume, root dry weight, root oxidation activity (ROA), and root radial oxygen loss (ROL) (r = −0.839, −0.885, −0.401 and −0.934, p < 0.05), while there were significant positive correlations between root diameter; malic acid, citric acid, and succinic acid contents; and CH4 emission fluxes (r = 0.407, 0.753, 0.797, and 0.685, p < 0.05). The SEM showed that CH4 emission fluxes were directly influenced by ROL and organic acid contents, while the other root indicators had indirect effects by modulating ROL and organic acid contents. ROL and root volume had the largest total effect, indicating that ROL and root volume were the most significant root physiological and morphological indicators affecting CH4 emission fluxes. This study provides theoretical support and reference data for achieving sustainable agricultural development in the black soil region of Northeast China.

show abstract

Investigation on Temporal Variation in Methane Emission from Different Rice Cultivars under the Influence of Weeds

Cited by 6 publications

References 5 publications

The chemodiversity of paddy soil dissolved organic matter correlates with microbial community at continental scales

The chemodiversity of paddy soil dissolved organic matter correlates with microbial community at continental scales

Biogeochemistry of paddy soils

Effect and Mechanism of Root Characteristics of Different Rice Varieties on Methane Emissions

Contact Info

Product

Resources

About