Anammox co-fungi accompanying denitrifying bacteria are the thieves of the nitrogen cycle in paddy-wheat crop rotated soils

Abbas, Touqeer; Zhou, Huifang; Zhang, Qichun; Li, Yong; Liang, Yongchao; Di, Hongjie; Zhao, Yanfang

doi:10.1016/j.envint.2019.104913

Cited by 20 publications

(8 citation statements)

References 41 publications

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“…In addition, the denitrifying bacteria Rhodanobacter was abundant in CF-treated soil. Denitrifying bacteria converts nitrates in the soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity [63]. Another member of Rhodanobacteraceae, Chujaibacter, was highly abundant in CF group.…”

Section: Abundance Of Nitrifying Bacteria and Archaea In Sf-treated S...mentioning

confidence: 99%

Seaweed Fertilizer Prepared by EM-Fermentation Increases Abundance of Beneficial Soil Microbiome in Paddy (Oryzasativa L.) during Vegetative Stage

et al. 2022

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Excessive use of chemical fertilizer could potentially decrease soil productivity by decreasing soil microbiome diversity. In this study, we evaluated the effects of fermented seaweed fertilizer in the soil microbial community of paddy plants (Oryza sativa L.). The paddy seedlings were divided into five groups, control (C0), chemical fertilizer (CF), seaweed fertilizer (SF), chemical and seaweed fertilizer combination 50:50 (CFSF1), and chemical and fertilizer combination 75:25 (CFSF2). The CFSF1 combination showed to be the most effective in inducing plant height (83.99 ± 3.70 cm) and number of tillers (24.20 ± 4.08). After 8 weeks after transplantation, the isolated DNA from each soil treatment were subjected to 16S rRNA (v3–v4 region) next-generation sequencing. The beneficial Acidobacteriota was most abundant in CFSF1. At genus level, the nitrifying bacteria MND1 was seen to be abundant in CFSF1 and also present in other SF treatments. The genus Chujaibacter is highly abundant in CF, which potentially plays a role in denitrification resulting in soil degradation. In addition, the CFSF1-treated soils show significantly higher diversity of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA). The current results could potentially contribute to the utilization of SF as a bioremediator and promoting green agriculture practice by reducing the amount of CF usage.

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Section: Abundance Of Nitrifying Bacteria and Archaea In Sf-treated S...mentioning

confidence: 99%

Seaweed Fertilizer Prepared by EM-Fermentation Increases Abundance of Beneficial Soil Microbiome in Paddy (Oryzasativa L.) during Vegetative Stage

et al. 2022

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“…The pH values are higher in the anaerobic phase than the aerobic phase. Since the phosphorus removal is >80% for wastewater containing 75 ppm phosphorus, the phosphorus concentration is increased to 100 ppm, keeping the same HRTs in the anaerobic and aerobic reactors [20,21]. Fig.…”

Section: Biological Phosphorus Removalmentioning

confidence: 99%

Development of a high rate biological system (Anammox + phosporous) for the treatment of low strength wastewaters

Ramesh

Goel²,

Sudarsan³

et al. 2023

Environmental Chemistry and Ecotoxicology

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“…Due to the tight coupling of carbon (C) and N, the input of organic matter would inevitably lead to changes in the N transformation processes (Pitombo et al, 2017;Wang et al, 2020). Straw returning has been demonstrated to increase denitrification, anammox and DNRA rates Abbas, Zhou, et al, 2019; by altering the nitrate reduction associated microbial communities in paddy soils. Rahman et al (2018) found that long-term NPK and pig manure fertilization significantly stimulated denitrification and anammox rates mainly through enhancing soil organic C (SOC) contents in the paddy soils.…”

Section: Introductionmentioning

confidence: 99%

Long‐term fertilization regulates dissimilatory nitrate reduction processes by altering paddy soil organic carbon components

Li,

Wei,

Wang

et al. 2023

Soil Use and Management

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To enhance rice yields, synthetic nitrogen (N) fertilizers are often applied in rice paddy fields. Under waterlogged conditions, denitrification, anaerobic ammonium oxidation (anammox) and dissimilatory nitrate reduction to ammonium (DNRA) are the main N transformation processes. However, the effects of long‐term fertilization on the dissimilatory nitrate reduction processes remain largely unclear. Here, we investigated rates of denitrification, anammox and DNRA and the abundance of bacterial and nitrate reduction‐related genes (16S rRNA, narG, nirK, nirS, nosZ and hzsB) in rice paddy fields under different fertilization regimes [i.e., non‐fertilization (CK), NPK fertilization (NPK) and NPK fertilization plus straw returning (NPKS)]. The rates of denitrification, anammox and DNRA in the CK treatment were 46.18, 0.35 and 1.29 nmoL N g−1 h−1, respectively, which were significantly (p < .05) increased by 7.32%–27.78%, 2.45–4.12 folds and 1.01–13.23 folds by NPK and NPKS treatments. This was largely consistent with the increased bacterial and nitrate reduction‐related gene abundances in the NPK and NPKS treatments. In addition, NPKS also significantly increased the relative contribution of DNRA to the total nitrate reduction relative to NPK and CK treatments, indicating that NPKS was more beneficial to N retention in the paddy field. Changes in rates of dissimilatory nitrate reduction processes in response to NPK and NPKS treatments were correlated to variations of soil total N, ammonium contents, pH, soil organic carbon (SOC) contents and nitrate reduction‐related genes, among which SOC contents had the highest explanation. Specifically, fulvic‐like compounds, alkyl C and methoxyl and nitrogen‐alkyl C were the key components determining denitrification, anammox and DNRA rates, respectively. Overall, our study suggests that long‐term NPK and NPKS fertilization stimulate rates of dissimilatory nitrate reduction processes mainly by altering soil C components and NPKS is more effective in maintaining soil fertility in the paddy field.

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Anammox co-fungi accompanying denitrifying bacteria are the thieves of the nitrogen cycle in paddy-wheat crop rotated soils

Cited by 20 publications

References 41 publications

Seaweed Fertilizer Prepared by EM-Fermentation Increases Abundance of Beneficial Soil Microbiome in Paddy (Oryzasativa L.) during Vegetative Stage

Seaweed Fertilizer Prepared by EM-Fermentation Increases Abundance of Beneficial Soil Microbiome in Paddy (Oryzasativa L.) during Vegetative Stage

Development of a high rate biological system (Anammox + phosporous) for the treatment of low strength wastewaters

Long‐term fertilization regulates dissimilatory nitrate reduction processes by altering paddy soil organic carbon components

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