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

Cheng, Zhibo; Chen, Yun; Zhang, Fenghua

doi:10.1016/j.still.2018.12.015

Cited by 46 publications

(40 citation statements)

References 51 publications

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“…To the best of our knowledge, there are only a few studies of the long‐term effect of land‐use change on the microbial communities in a desert‐oasis ecotone. 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.…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…Therefore, BC amendment affects adversely soil bacterial growth and reduces α‐diversity in small particles (<0.25‐mm aggregates). Notably, the predicted functions should be cautiously considered due to the inherent limitations of PICRUSt (Cheng, Chen, & Zhang, ). Metagenomics studies are needed to better understand the changes in bacterial functions under different organic amendments.…”

Section: Discussionmentioning

confidence: 99%

Linking bacterial community to aggregate fractions with organic amendments in a sandy soil

et al. 2019

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Soil aggregates provide microhabitats for microorganisms. However, the bacterial communities within various aggregate size fractions under organic amendments have rarely been evaluated especially in sandy soils. A field experiment involving addition of biogas residue (BR), pig manure (PM), biochar (BC), and straw (ST) of a sandy soil was performed to determine the structure of the bacterial community in aggregate size fractions by using high‐throughput sequencing. We found that organic amendments change soil aggregate fractions and nutrient content, alter bacterial diversity and composition, and contribute to the predicted bacterial functions. The BR increased bacterial α‐diversity in <0.25‐mm aggregates. The Nitrospirae was abundant in almost all aggregate sizes, whereas the abundance of Actinobacteria decreased in most of aggregates following BR addition. The PM amendment primarily facilitated the growth of Bacteroidetes and inhibited the growth of Acidobacteria and Chloroflexi in 0.25‐ to 2‐mm aggregates, whereas bacterial α‐diversity was decreased in the >0.25‐mm aggregates. The BC treatment decreased the bacterial α‐diversity in the <0.25‐mm aggregates and the Gemmatimonadetes abundance in all <2‐mm aggregates, but the Actinobacteria abundance was significantly increased in the >0.053‐mm aggregates. Collectively, the effects of organic amendments on the bacterial community varied greatly depending on type of amendments and aggregate size. The BR supported highly diverse bacterial taxa in the <0.25‐mm aggregates, whereas it proliferated N cycling‐related bacteria in all aggregates. Our results highlight the links between bacterial community and aggregate size fractions in sandy soils depending on organic amendments.

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“…The concentrations of total organic carbon (TOC), total nitrogen (TN), and total phosphate (TP) were determined by the potassium dichromate oxidation spectrophotometric method, modified kjeldahl method, and digestion‐Mo‐Sb antispectrophotometric method, respectively (Ma et al, 2016). Soil pH and oxidation–reduction potential (ORP) were measured in a soil–water suspension (1:5 and 1:2.5 soil–water ratio, respectively) (Cheng, Chen, & Zhang, 2019). Soil moisture (SM) and ash‐free dry mass (AFDM) were determined as described in our previous study (Ma et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

Soil bacterial and fungal communities and associated nutrient cycling in relation to rice cultivation history after reclamation of natural wetland

Huang

et al. 2020

Land Degrad Dev

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The reclamation and utilization of natural wetlands can affect the community structure of soil microorganisms. However, knowledge regarding succession of microbial communities during long‐term reclamation and the links with related nutrient cycles is still limited. Using Illumina sequencing, we identified the patterns and environmental drivers of soil bacterial and fungal succession along a 150‐year chronosequence of paddy fields. Soil enzyme activities were determined to characterize functions related to C, N, and P cycles. The results showed that reclamation activity and its history have greatly altered the bacterial community structure and the bacterial groups. This change being mainly reflected in the bacterial genera Halomonas, genera Isosphaera, and family Planctomycetaceae. The change of fungal community was mainly apparent between natural wetlands and paddy fields, manifested as an increase in the classes Sordariomycetes and Dothideomycetes and a significant decrease inthe class Agaricomycetes in paddy fields compared with natural wetland. Compared with fungi, bacteria were more strongly affected by soil chemical nutrient properties and physical properties. Furthermore, the structural equation model indicated that both bacterial and fungal community structure and diversity had a great influence on the C, N, and P cycles. In summary, the bacterial community was more sensitive throughout the history of rice cultivation after reclamation than the fungal community, but both bacteria and fungi may play major roles in soil ecological functions. These findings contribute to the understanding of ecosystem functional mechanisms, which provides a new perspective for the management of natural wetlands.

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

Cited by 46 publications

References 51 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

Linking bacterial community to aggregate fractions with organic amendments in a sandy soil

Soil bacterial and fungal communities and associated nutrient cycling in relation to rice cultivation history after reclamation of natural wetland

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