Anammox microbial community and activity changes in response to water and dissolved oxygen managements in a paddy-wheat soil of Southern China

Abbas, Touqeer; Zhang, Qichun; Jin, Hua; Li, Yong; Liang, Yongchao; Di, Hongjie; Zhao, Yanfang

doi:10.1016/j.scitotenv.2019.03.392

Cited by 36 publications

(9 citation statements)

References 43 publications

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“…Changes in precipitation can alter the anammox rates under climate changes. Higher water contents can increase the abundance of anammox bacteria in dry areas (Abbas et al, 2019), and high soil moisture can revive dormant anammox bacteria (Zhu et al, 2019). The greater abundance and activities of anammox bacteria under increased precipitation may likely contribute to the higher anammox rates.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, the changes in environmental factors can affect anammox rates by altering some anammox bacteria. The abundance and activities of anammox bacteria can be influenced by soil moisture and availability of anammox substrates (Abbas et al, 2019; Bai, Xi, et al, 2015), which can ultimately alter the anammox rate. Therefore, we hypothesized that the abundances of anammox bacteria contributed eminently to the geographical variations of anammox rates on a global scale (H1).…”

Section: Introductionmentioning

confidence: 99%

“…The lower and/ or higher temperatures impede the anammox rate due to reduced enzymatic activities and/or the disintegration of microbial cells (Sobotka et al, 2021;Zhou et al, 2014). The greater soil moisture levels under increased precipitation (Tan et al, 2021) can accelerate anammox rates (Abbas et al, 2019). Li et al (2020) suggested that the rate of anammox was increased from 0.13 to 1.55 nmol N 2 g −1 h −1 with the soil water contents rising from 34.5% to 40.1%.…”

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confidence: 99%

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Global variations and controlling factors of anammox rates

Yao

Han

Liu

et al. 2023

Global Change Biology

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Soil anammox is an environmentally friendly way to eliminate reactive nitrogen (N) without generating nitrous oxide. Nevertheless, the current earth system models have not incorporated the anammox due to the lack of parameters in anammox rates on a global scale, limiting the accurate projection for N cycling. A global synthesis with 1212 observations from 89 peer‐reviewed papers showed that the average anammox rate was 1.60 ± 0.17 nmol N g−1 h−1 in terrestrial ecosystems, with significant variations across different ecosystems. Wetlands exhibited the highest rate (2.17 ± 0.31 nmol N g−1 h−1), followed by croplands at 1.02 ± 0.09 nmol N g−1 h−1. The lowest anammox rates were observed in forests and grasslands. The anammox rates were positively correlated with the mean annual temperature, mean annual precipitation, soil moisture, organic carbon (C), total N, as well as nitrite and ammonium concentrations, but negatively with the soil C:N ratio. Structural equation models revealed that the geographical variations in anammox rates were primarily influenced by the N contents (such as nitrite and ammonium) and abundance of anammox bacteria, which collectively accounted for 42% of the observed variance. Furthermore, the abundance of anammox bacteria was well simulated by the mean annual precipitation, soil moisture, and ammonium concentrations, and 51% variance of the anammox bacteria was accounted for. The key controlling factors for soil anammox rates differed from ecosystem type, for example, organic C, total N, and ammonium contents in croplands, versus soil C:N ratio and nitrite concentrations in wetlands. The controlling factors in soil anammox rate identified by this study are useful to construct an accurate anammox module for N cycling in earth system models.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Global variations and controlling factors of anammox rates

Yao

Han

Liu

et al. 2023

Global Change Biology

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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, Zhang, et al., 2019; Abbas, Zhou, et al., 2019; Zhang, Zhang, Wu, et al., 2021) by altering the nitrate reduction associated microbial communities in paddy soils. Rahman et al.…”

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 microbial community and activity changes in response to water and dissolved oxygen managements in a paddy-wheat soil of Southern China

Cited by 36 publications

References 43 publications

Global variations and controlling factors of anammox rates

Global variations and controlling factors of anammox rates

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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