Effect of reclamation of abandoned salinized farmland on soil bacterial communities in arid northwest China

Cheng, Zhibo; Chen, Yun; Zhang, Fenghua

doi:10.1016/j.scitotenv.2018.02.259

Cited by 45 publications

(35 citation statements)

References 49 publications

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“…The relative abundance of the top bacterial phyla among land‐use types was distinct (Figure 3 and Table S1) revealing that soil microbial composition was impacted by reclamation of DL to different land‐use types even after 60 years of reclamation. The high‐throughput sequencing showed that CL sustained a higher relative abundance of Actinobacteria than in other land‐use types in our study which was similar to that of Cheng et al (2018). The results indicate that the Actinobacteria remained relatively stable for a long time (e.g., ~60 years) after the desert land is reclaimed to the cropland.…”

Section: Discussionsupporting

confidence: 90%

“…Bacterial community composition and diversity change in an ecosystem indicate the bacterial response to the environment change (Cheng et al, 2018). As we hypothesized, the composition of the bacterial community in DL and reclaimed soils differed substantially based on taxa composition (Figures 3 and 4; Tables S1 and S2) and the NMDS (Figure 6) analyses.…”

Section: Discussionmentioning

confidence: 99%

“…Cheng, Chen, and Zhang (2019) studied the effect of land‐use types 5 years after land‐use change in a desert‐oasis ecotone and found that a cropping system with maize‐wheat rotation had a higher bacterial diversity and metabolic function than that ofa system with tree‐intercrop and monoculture cotton. In another study, Cheng, Chen, and Zhang (2018) observed a substantial increase in bacterial diversity (Chao1 and Shannon) after a land‐use change to cotton land from abandoned salinized farmland. However, it is still unclear if the effects of land reclamation can persist for several decades.…”

Section: Introductionmentioning

confidence: 98%

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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%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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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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“…Firmicutes, Actinobacteria, Proteobacteria, Acidobacteria, Chloroflexi, Bacteroidetes, and Planctomycetes were the most dominant phyla at all study area. Other studies of soil bacteria have confirmed that these phyla were also a major component [43]. The relative abundance of some dominant phylum changed significantly under the influence of rhizosphere, aridity, and dune type (Fig 2B, 2C, 2E and 2F).…”

Section: Discussionmentioning

confidence: 59%

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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“…The total number of OTUs and bacterial diversity indices (including ACE, Chao, and Shannon) were the highest in LC. This is related to the higher SOM content in the LC rhizosphere soil, since accumulation of organic matter increases the chances of successful migration of soil bacteria community 29 . These consequences indicate the LC is more conducive to the restoration of soil bacterial diversity in salinealkali conditions compared with PT and SG.…”

Section: Discussionmentioning

confidence: 99%

Drivers on The Halophytes' Rhizosphere Bacteria Community and Functions in North China Salinized Areas

Yin

Zhang

Cheng

et al. 2021

Preprint

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Soil salinity is a serious environmental issue in arid China. Soil bacteria play a fundamental role in soil systems and respond rapidly to environmental changes. However, the responses of soil bacterial community to the different halophytes remains poorly understood. We investigated rhizosphere soil bacterial community changes under different halophytes in north China using high-throughput sequencing. Three typical halophytes were Leymus chinensis (LC), Puccinellia tenuiflora (PT), Suaeda glauca (SG). The dominant phyla were Proteobacteria, Actinobacteria, and Chloroflexi across three halophytic vegetation. These bacteria have important assistance for halophytes adapt to saline soil. PICRUSt forecasts demonstrated that energy metabolism, amino acid metabolism and carbohydrate metabolism are main bacterial functions in halophyte vegetation soil, and the abundance of metabolism these bacterial functions in SG was significantly higher than that in LC and PT. The pH value of different halophyte rhizosphere soils has a more significant effect on bacterial diversity than EC and soil trophic status, and soil water content (SWC) was important effect factors leading to differences in bacterial functions. These results give us a deeper understanding of the diversity and functional differences of rhizosphere soil bacterial communities in the typical halophytic vegetation of northern China.

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Effect of reclamation of abandoned salinized farmland on soil bacterial communities in arid northwest China

Cited by 45 publications

References 49 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

Drivers on The Halophytes' Rhizosphere Bacteria Community and Functions in North China Salinized Areas

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