pH rather than nitrification and urease inhibitors determines the community of ammonia oxidizers in a vegetable soil

Xi, Ruijiao; Long, Xiaojing; Huang, Sha; Yao, Huaiying

doi:10.1186/s13568-017-0426-x

Cited by 42 publications

(17 citation statements)

References 58 publications

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“…In contrast, Nicol et al 34 found that AOB abundances significantly decreased with decreasing pH, while AOA exhibited an opposite relationship. Further, Xi et al 55 observed that a decrease in soil pH resulted in a significant increase in AOA abundances without affecting AOB abundances. The lack of major change in AOA or AOB abundances observed here could be due to the relatively small range of pH change in this study, with salinity having a more important effect.…”

Section: Discussionmentioning

confidence: 99%

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Guo

Liang

et al. 2020

Sci Rep

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Soil nitrification via ammonia oxidation is a key ecosystem process in terrestrial environments, but little is known of how increasing irrigation of farmland soils with saline waters effects these processes. We investigated the effects of long-term irrigation with saline water on the abundances and community structures of ammonia-oxidizing bacteria (AOB) and archaea (AOA). Irrigation with brackish or saline water increased soil salinity (EC 1:5 ) and NH 4 -n compared to irrigation with freshwater, while no 3 -n, potential nitrification rates (PNR) and amoA gene copy numbers of AOA and AOB decreased markedly under irrigation regimes with saline waters. Moreover, irrigation with brackish water lowered AOA/ AOB ratios. PNR was positively correlated with AOA and AOB amoA gene copy numbers across treatments. Saline and brackish water irrigation significantly increased the diversity of AOA, as noted by Shannon index values, while saline water irrigation markedly reduced AOB diversity. In addition, irrigation with brackish or fresh waters resulted in higher proportions of unclassified taxa in the AOB communities. However, irrigation with saline water led to higher proportions of unclassified taxa in the AoA communities along with the Candidatus Nitrosocaldus genus, as compared to soils irrigated with freshwater. AOA community structures were closely associated with soil salinity, NO 3 − n, and pH, while AOB communities were only significantly associated with NO 3 − N and pH. These results suggest that salinity was the dominant factor affecting the growth of ammonia-oxidizing microorganisms and community structure. These results can provide a scientific basis for further exploring the response mechanism of ammonia-oxidizing microorganisms and their roles in nitrogen transformation in alluvial grey desert soils of arid areas.index showed a significant (P < 0.001) opposite relationship. In addition, the SW treatment soils had a significantly lower AOB Shannon index (P = 0.002) compared to the FW soils, but a significantly higher Simpson index value (P = 0.003). The BW treatment did not have a significant effect on AOB diversity index. Scientific RepoRtS | (2020) 10:489 | https://doi.Scientific RepoRtS | (2020) 10:489 | https://doi.org/10.1038/s41598-019-57402-xwww.nature.com/scientificreports www.nature.com/scientificreports/ Nitrosomonadaceae and Nitrosopumilaceae were the two most dominant families in the dataset. The relative abundances of Nitrosomonadaceae were significantly greater in the FW treatment soils than in those of the BW and SW treatments (P < 0.001). However, no significant differences were observed for the relative abundances of Nitrosopumilaceae among the FW, BW, and SW treatment soils. Nitrosopumilus and Nitrosospira were the two most dominant genera in the sequencing datasets. The relative abundances of Nitrosospira were significantly higher in the FW treatment soils than in those of the BW and SW treatments (P < 0.001). However, no significant differences were observed for the relative abundances of Ni...

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Section: Discussionmentioning

confidence: 99%

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Guo

Liang

et al. 2020

Sci Rep

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“…In relation to the activity, distribution and abundance of soil microbes in soils treated with NBPT, a few studies have been carried out. A very recent paper found that while NBPT did not influence the growth or ratio of ammonia oxidizers (archaea and bacteria) in vegetable soil, soil pH played a prominent role (Xi et al 2017). Another study found that application of NBPTcoated urea fertilizer reduced the decrease in soil pH otherwise observed on fertilization with un-amended urea, suggesting that use of NBPT may lessen the effect of urea fertilization on native soil microbial communities (Shi et al 2017).…”

Section: Ammonia Emission Mitigation By Urease Inhibitorsmentioning

confidence: 99%

The molecular processes of urea hydrolysis in relation to ammonia emissions from agriculture

Sigurdarson

Svane

Karring

2018

Rev Environ Sci Biotechnol

243

129

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Ammonia emissions from the agricultural sector give rise to numerous environmental and societal concerns and represent an economic challenge in crop farming, causing a loss of fertilizer nitrogen. Ammonia emissions from agriculture originate from manure slurry (livestock housing, storage, and fertilization of fields) as well as urea-based mineral fertilizers. Consequently, political attention has been given to ammonia volatilization, and regulations of ammonia emissions have been implemented in several countries. The molecular cause of the emission is the enzyme urease, which catalyzes the hydrolysis of urea to ammonia and carbonic acid. Urease is present in many different organisms, encompassing bacteria, fungi, and plants. In agriculture, microorganisms found in animal fecal matter and soil are responsible for urea hydrolysis. One strategy to reduce ammonia emissions is the application of urease inhibitors as additives to urea-based synthetic fertilizers and manure slurry to block the formation of ammonia. However, treatment of the manure slurry with urease inhibitors is associated with increased livestock production costs and has not yet been commercialized. Thus, development of novel, environmentally friendly and cost-effective technologies for ammonia emission mitigation is important. This mini-review describes the challenges associated with the volatilization of ammonia in agriculture and provides an overview of the molecular processes of urea hydrolysis and ammonia emissions. Different technologies and strategies to reduce ammonia emissions are described with a special focus on the use of urease inhibitors. The mechanisms of action and efficiency of the most important urease inhibitors in relation to agriculture will be briefly discussed.

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“…This research focused on the abundance of microbial community construction and the effects of specific parameters on AOA and AOB groups along streams south of the Dabie Mountains (from upstream to downstream), China. The phylogenetic analysis of the AOA amoA communities in the rivers and sediments showed that most of the revealed sequences (90.0%-97.0%) in the nine sampling sites were linked with Nitrososphaera viennensis and Nitrosopumilus sp clusters I.2, I.3, and I.4 [24]. N. viennensis and Nitrosopumilus sp (moderately) (Figure 2) were extracted from sediments, which could autotrophically or heterotrophically, or even mixotrophically, be involved in ammonia oxidation in freshwater and sediment environments [25].…”

Section: Discussionmentioning

confidence: 99%

Functional Characterization and Diversity of Ammonia-Oxidizing Microorganisms in Streams South of the Dabie Mountains, China

Ginawi¹,

Lixiao²,

Wang³

et al. 2018

Preprint

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Ammonia-oxidizing microorganism communities are abundant and functionally efficacious in nitrification. However, ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) groups complicate this process in subtropical streams. This study investigates the abundance of ammonia-oxidizing communities south of the Dabie Mountains, China, using quantitative polymerase chain reaction (qPCR). Clone libraries were utilized to analyze the abundance and microbial structures of AOA and AOB in sediments. Such analysis may provide strong evidence reflecting the links within the environment. The results show that AOB had a lower abundance of copies of the ammonia-oxidizing gene (amoA) than AOA. Interestingly, the AOA and AOB community compositions were correlated with ecological characteristics. The dissolved oxygen (DO) and oxidation-reduction potential (ORP) had significant positive correlations, whereas the phosphorus within the structure had a negative correlation with the abundance of both groups. Our study shows that it might adopt some species related to Nitrosotalea clusters that can resist comparably higher pH (toward pH 6.5). Together, these results imply that the physiological adaptation of microbial guilds to environmental pressures in ammonia-oxidizing archaea might allow them to have a more substantial function of ammonia-oxidizing communities in natural habitats.

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pH rather than nitrification and urease inhibitors determines the community of ammonia oxidizers in a vegetable soil

Cited by 42 publications

References 58 publications

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

Response of ammonia-oxidizing Bacteria and Archaea to long-term saline water irrigation in alluvial grey desert soils

The molecular processes of urea hydrolysis in relation to ammonia emissions from agriculture

Functional Characterization and Diversity of Ammonia-Oxidizing Microorganisms in Streams South of the Dabie Mountains, China

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