Effects of reclamation years on composition and diversity of soil bacterial communities in Northwest China

Cheng, Zhibo; Zhang, Fenghua; Gale, William F.; Wang, Weichao; Sang, Wen; Yang, Haichang

doi:10.1139/cjm-2017-0362

Cited by 24 publications

(20 citation statements)

References 58 publications

(59 reference statements)

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“…Soil bacterial community structure was also found to be most affected by SOC (Figure 7 and Table 4) based on RDA analysis. The result was similar to that of Cheng et al (2017) and Li, Liu, and Chen (2016) in which bacterial community compositions were found to be driven by SOC in semi‐arid agricultural ecosystem. Soil pH has been considered as a significant factor that explains the diversity and richness changes in many different ecosystems (Fierer & Jackson, 2006; Ramirez et al, 2014).…”

Section: Discussionsupporting

confidence: 90%

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Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Pokharel

Chen

2020

Land Degrad Dev

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Understanding the impacts of different land‐uses on soil microbial communities is essential for maintaining soil health and sustainability in a desert‐oasis ecotone. Information on the microbial community composition of reclaimed soils under different land‐use types after several decades of reclamation are limited. The objective of this study was to investigate the impacts of reclamation of the non‐productive desert to productive lands on soil microbial community composition and identify the critical soil chemical factors associated with these changes. Soil samples were collected from a control (natural desert land [DL]) and reclaimed lands: cotton land (CL), grape land (vinyards) (GL), and shelterbelt (SL). Soil microbial community composition and diversity were determined by high throughput sequencing. The results showed that soil organic carbon (SOC), total nitrogen (N), phosphorus (P), potassium (K), and pH were significantly different between DL and reclaimed soils (CL, GL, and SL). Sixty years after reclamation, the CL contained a higher relative abundance of Actinobacteria, while the GL and SL contained a higher relative abundance of Acidobacteria. There were 541 operational taxonomic units (OTUs) shared by all the four land‐use types. The highest number of shared OTUs was found in the GL and SL. The variance observed in the bacterial communities in all land‐use types were mainly explained by SOC, followed by total N, total K, pH, and total P. Our results suggest that land‐use type change has significant impacts on soil bacterial community composition and diversity through modifications in soil chemical properties in desert‐oasis ecotone.

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Section: Discussionsupporting

confidence: 90%

“…Soil microbial diversity is critical to the long‐term sustainability of soil ecosystems (Cheng et al, 2017; Kennedy & Smith, 1995). Diversity indices are useful to understand the status of soil microbial communities (Kennedy & Smith, 1995).…”

Section: Discussionmentioning

confidence: 99%

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Pokharel

Chen

2020

Land Degrad Dev

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“…Soil EC was a major factor affecting the structure and distribution of soil bacterial community in many studies [60]. It has an impact on many dominant phyla, especially Firmicutes and Proteobacteria, which was consistent with the findings of other studies [61,62]. At different types of dunes, Actinobacteria, Planctomycetes, and Gemmatimonadetes were particularly affected by environmental factors (Fig 7B).…”

Section: Discussionsupporting

confidence: 87%

Effect of aridity and dune type on rhizosphere soil bacterial communities of Caragana microphylla in desert regions of northern China

et al. 2019

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Understanding the response of soil properties and bacterial communities in rhizosphere soil to aridity and dune types is fundamental to desertification control. This study investigated soil properties and bacterial communities of both rhizosphere and bulk soils of Caragana microphylla from four sites with different aridity indices, and one site with three different types of dunes. All sites were located in the desert regions of northern China. The results indicated that compared with the bulk soil, the soil nutrient content of rhizosphere, especially the content of total phosphorus, was generally significantly improved in different desertification environments. The bacterial richness and diversity were also higher than those of bulk soil, especially in arid regions and fixed dunes. Firmicutes, Actinobacteria, Proteobacteria, and Acidobacteria were the most dominant phyla in all samples. The regression analyses showed that at different sites, soil total organic C, total N, Na+, and total P played key roles in determining the bacterial community structure while total organic carbon, electronic conductivity, pH and total phosphorus were the dominant factors at the different dunes. The results further revealed that the dominant phyla strongly affected by environmental factors at different sites were Acidobacteria, Gemmatimonadetes, and Actinobacteria among which, Acidobacteria and Gemmatimonadetes were negatively correlated with Na+ content. At different types of dunes, Actinobacteria, Planctomycetes, and Gemmatimonadetes were particularly affected by environmental factors. The increased abundance of Actinobacteria in the rhizosphere soil was mainly caused by the decreased soil pH.

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“…At the phylum level, Proteobacteria, Acidobacteria, Nitrospirae, Planctomycetes, Verrucomicrobia, Armatimonadetes, Latescibacteria, and Elusimicrobia had a negative relation with soil salinity, whereas Gemmatimonadetes, Actinobacteria, Chloroflexi, Bacteroidetes, and Saccharibacteria had a positive relation. However, previous studies found that Gemmatimonadetes, Acidobacteria, Nitrospirae, and Chloroflexi are also negatively correlated with soil salinity [36,37]. In this study, pH was negatively correlated with salinity, indicating that pH indirectly affected bacterial community composition via other soil properties.…”

Section: Discussioncontrasting

confidence: 51%

Long-Term Irrigation with Saline Water Decreases Soil Nutrients, Diversity of Bacterial Communities, and Cotton Yields in a Gray Desert Soil in China

Guo¹,

Shi²,

Ma³

et al. 2020

Pol. J. Environ. Stud.

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Irrigation with saline water alters the soil environment, thereby influencing soil microbial processes and crop growth. The objective of this field experiment was to compare the effects of long-term irrigation with saline water or freshwater on cotton growth, soil physicochemical properties, and bacterial community structure. High-throughput sequencing of DNA of the 16S rRNA gene was used to assess the composition of bacterial communities. Saline-water irrigation significantly increased soil salinity and significantly decreased pH, soil organic matter, total nitrogen, and biomass and yield of cotton. Cotton biomass and yield were negatively correlated with soil salinity but were positively correlated with soil organic matter, and total nitrogen. Compared with fresh water irrigation, irrigation with saline water significantly decreased the Shannon diversity index of the bacterial community. Compared with freshwater irrigation, saline-water irrigation significantly increased the relative abundance of two phyla of bacteria (Gemmatimonadetes and Actinobacteria) and decreased that of two (Proteobacteria and Acidobacteria). In addition, the relative abundance of 5 genera was significantly higher (Sphingomonas, Gemmatimonas, Gaiella, Solirubrobacter, and Nocardioides) and that of 7 was significantly lower (RB41, H16, Haliangium, Nitrospira, Lysobacter, Acidobacteria_bacterium, and Bryobacter) in the saline-water treatment. Soil salinity and pH were the major environmental factors that shaped bacterial communities. According to LEfSe analysis, only 3 indicator species were associated with saline-water irrigation, whereas 5 indicator species were associated with freshwater irrigation. Overall, long-term irrigation with saline water adversely affected soil properties and led to decreases in soil bacterial community diversity and cotton growth and yield. These results contribute to a more comprehensive understanding of bacterial communities in saline environments.

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Effects of reclamation years on composition and diversity of soil bacterial communities in Northwest China

Cited by 24 publications

References 58 publications

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Effect of aridity and dune type on rhizosphere soil bacterial communities of Caragana microphylla in desert regions of northern China

Long-Term Irrigation with Saline Water Decreases Soil Nutrients, Diversity of Bacterial Communities, and Cotton Yields in a Gray Desert Soil in China

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