Bacterial community composition is shaped by soil secondary salinization and acidification brought on by high nitrogen fertilization rates

Shen, Weishou; Ni, Yingying; Gao, Nan; Bian, Biyun; Zheng, Shunan; Lin, Xiangui; Chu, Haiyan

doi:10.1016/j.apsoil.2016.08.005

Cited by 97 publications

(52 citation statements)

References 33 publications

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“…Unweighted UniFrac PCoA of different N fertilization conditions revealed that soil bacterial community composition changed obviously with decreasing N fertilization rate under RW irrigation, which is consistent with the results of another study [16]. At the same nitrogen level, RW irrigation promoted the growth of oligotrophic bacteria (mainly Actinobacteria) as compared to CW irrigation, which was likely due to the provision of organic carbon and other elements, as is suggested by the simultaneous increase in the activity of oligotrophic bacteria [45,46].…”

Section: Effects Of Rw Irrigation On Soil Bacterial Community Strctursupporting

confidence: 79%

“…RW irrigation significantly increased soil pH, which is in accordance with other authors [8,9], and can be attributed to the additional input of exchangeable cations, especially sodium contained in irrigation water [32]. The soil pH was affected not only by the N fertilization, but also by the interaction of N level and irrigation water type [8,16].…”

Section: Changes In Soil Chemical Properties Under Rw Irrigationsupporting

confidence: 77%

“…High N fertilization was found to result in secondary salinization and acidification of soil and caused environmental stress, thereby limiting bacterial growth [16]. Proteobacteria were the main pathogenic bacteria group under long-term RW irrigation, followed by conditional pathogenic bacteria such as Flavobacterium and Aeromonas.…”

Section: Effects Of Rw Irrigation On Soil Bacterial Diversitymentioning

confidence: 99%

“…The recent development of high-throughput sequencing (HTS) technology has enabled the evaluation of the soil microbial communities to take a leap forward (i.e., 16S rRNA gene amplification coupled with HTS read length allowing maximal detection of microorganisms). HTS has been used to investigate microbial ecology under fertilization and RW irrigation, including the effects of secondary soil salinization and acidification due to high N application rates on bacterial community composition [16]. Bacterial community structure and biochemical cycling capacity of contaminants in wetlands were shown to be altered under RW irrigation [17].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Reclaimed Water Irrigation on Microbial Diversity and Composition of Soil with Reducing Nitrogen Fertilization

Guo

Xiao

et al. 2018

Water

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Reclaimed water (RW) is an alternative water resource that has been utilized all over the world, but its environmental effects are not fully understood. Soil biodiversity is an important indicator of soil tolerance and resilience. In the present study, the impact of RW irrigation on the microbial community diversity and chemical properties of topsoil was investigated by monitoring nitrogen (N) rates. Tomato plants were grown on plots which had been irrigated with reclaimed water for 5 years with varying levels of N fertilization (N270, 270 kg ha −1 ; N216, 216 kg ha −1 ; N189, 189 kg ha −1 ; and N135, 135 kg ha −1 ). Soil bacterial community composition was analyzed by PCR amplification of the 16S rDNA gene and Illumina MiSeq high-throughput sequencing technology of a total of 770,066 quality sequences. The results showed that long-term RW irrigation altered the bacterial composition of soil in an N-dependent manner. RW irrigation increased the abundances of Gemmatimonadetes, Actinobacteria, Firmicutes, and Nitrospirae in soils. The Chao, ACE, and H indices revealed no significant difference under RW irrigation with varying levels of N fertilization. The tomato yield and partial factor productivity from applied N for RN216 increased significantly under RW irrigation with reducing N fertilization. RW irrigation increased the yield of tomato and the abundance of functional microorganisms, which eventually improved the practice of irrigating with reclaimed municipal wastewater. Meanwhile, the potential environmental and health risks of long-term RW irrigation warrant further investigation.

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Section: Effects Of Rw Irrigation On Soil Bacterial Community Strctursupporting

confidence: 79%

Section: Changes In Soil Chemical Properties Under Rw Irrigationsupporting

confidence: 77%

Section: Effects Of Rw Irrigation On Soil Bacterial Diversitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Reclaimed Water Irrigation on Microbial Diversity and Composition of Soil with Reducing Nitrogen Fertilization

Guo

Xiao

et al. 2018

Water

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show abstract

“…Long‐term N fertilization reduced soil pH in our study (Fig. S3A), which explains the concurrent increase in abundance of Acidobacteria that we observed, as previously reported (Shen et al ., ; Xun et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Long‐term effects of nitrogen and phosphorus fertilization on soil microbial community structure and function under continuous wheat production

Tremblay

Bainard

et al. 2019

Environmental Microbiology

113

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Summary Soil microorganisms play a critical role in the biosphere, and the influence of cropland fertilization on the evolution of soil as a living entity is being actively documented. In this study, we used a shotgun metagenomics approach to globally expose the effects of 50‐year N and P fertilization of wheat on soil microbial community structure and function, and their potential involvement in overall N cycling. Nitrogen (N) fertilization increased alpha diversity in archaea and fungi while reducing it in bacteria. Beta diversity of archaea, bacteria and fungi, as well as soil function, were also mainly driven by N fertilization. The abundance of archaea was negatively impacted by N fertilization while bacterial and fungal abundance was increased. The responses of N metabolism‐related genes to fertilization differed in archaea, bacteria and fungi. All archaeal N metabolic processes were decreased by N fertilization, while denitrification, assimilatory nitrate reduction and organic‐N metabolism were highly increased by N fertilization in bacteria. Nitrate assimilation was the main contribution of fungi to N cycling. Thaumarchaeota and Halobacteria in archaea; Actinobacteria, Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria and Deltaproteobacteria in bacteria; and Sordariomycetes in fungi participated dominantly and widely in soil N metabolic processes.

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Response of the tomato rhizosphere bacterial community to water–oxygen coupling under micronanobubble oxygenated drip irrigation in mildly saline soil

Wang,

Guo,

Zhang

et al. 2023

Land Degrad Dev

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The deterioration of the soil water–air environment due to salinization can reduce soil bacterial activity and cause crop yield reduction. Micronanobubble oxygenated drip irrigation can significantly improve the nonsaline soil water–air environment and enhance bacterial activity, but its effect on salinized soil bacteria is unknown. In this study, we used a tomato cultivation experiment in mildly saline soil to evaluate the responses of the rhizosphere bacterial community to the soil microenvironment created by micronanobubble oxygenated drip irrigation. The results indicated that the soil environmental factors (including soil electrical conductivity, i.e., EC) (r = 0.46) and root length (r = −0.86) had important regulatory effects on bacterial community function, which had significant direct effects on tomato yield (r = 0.46). The moderate dissolved oxygen concentration treatment significantly reduced the EC by 63.22%–73.32% compared with CK (noncultivated soil treatment) and generally increased the root length; however, only the combination of a moderate dissolved oxygen concentration and excess irrigation (A15W1.2) significantly increased tomato yields by 190.90% compared with A0W0.8 (the combination of a low dissolved oxygen concentration and insufficient irrigation) because the irrigation water volume was the limiting condition affecting the benefits of the root length increase. The high dissolved oxygen concentration treatment significantly reduced the EC by 60.36%–92.31% and increased the bacterial community diversity by 4.08%–6.16% compared with CK; these aforementioned changes favored the increase in tomato yield. However, similar to the result of the moderate dissolved oxygen treatments, the tomato yields were significantly higher and among the highest of all treatments only when a high dissolved oxygen concentration was combined with sufficient irrigation or excess irrigation (A30W1 or A30W1.2) due to the limiting effect of the irrigation water volume. Therefore, accounting for the changes in EC, soil bacterial community, and tomato yields, A15W1.2, A30W1, and A30W1.2 are recommended for tomato production in mildly saline soils.

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Bacterial community composition is shaped by soil secondary salinization and acidification brought on by high nitrogen fertilization rates

Cited by 97 publications

References 33 publications

Effects of Reclaimed Water Irrigation on Microbial Diversity and Composition of Soil with Reducing Nitrogen Fertilization

Effects of Reclaimed Water Irrigation on Microbial Diversity and Composition of Soil with Reducing Nitrogen Fertilization

Long‐term effects of nitrogen and phosphorus fertilization on soil microbial community structure and function under continuous wheat production

Response of the tomato rhizosphere bacterial community to water–oxygen coupling under micronanobubble oxygenated drip irrigation in mildly saline soil

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