Changes in soil bacterial and fungal community characteristics in response to long-term mulched drip irrigation in oasis agroecosystems

Wang, Jingya; Li, Haiqiang; Cheng, Zhibo; Yin, Fating; Yang, Lei; Wang, Zhenhua

doi:10.1016/j.agwat.2023.108178

Cited by 6 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most Cephalotrichum species are known for their saprotrophic function in decomposing plant materials (Woudenberg et al, 2017), corresponding with our results that the Cephalotrichum played a dominant role in POC and MAOC sequestration. In addition, higher abundance of Cephalotrichum led to the higher fungal diversity (Wang et al, 2023). Jin et al (2022) found that Cephalotrichum exerted significant inhibitory effects on several pathogenic bacteria.…”

Section: Microbial Keystone Species-driven Soc Fraction Sequestration...mentioning

confidence: 99%

Conservation tillage facilitates the accumulation of soil organic carbon fractions by affecting the microbial community in an eolian sandy soil

Li,

Wang,

Qiu

et al. 2024

Front. Microbiol.

View full text Add to dashboard Cite

Conservation tillage (CT) is an important agronomic measure that facilitates soil organic carbon (SOC) accumulation by reducing soil disturbance and plant residue mulching, thus increasing crop yields, improving soil fertility and achieving C neutrality. However, our understanding of the microbial mechanism underlying SOC fraction accumulation under different tillage practices is still lacking. Here, a 6-year in situ field experiment was carried out to explore the effects of CT and traditional tillage (CK) practices on SOC fractions in an eolian sandy soil. Compared with CK, CT increased the particulate OC (POC) content in the 0–30 cm soil layer and the mineral-associated OC (MAOC) content in the 0–20 cm soil layer. Moreover, tillage type and soil depth had significant influences on the bacterial, fungal and protistan community compositions and structures. The co-occurrence network was divided into 4 ecological modules, and module 1 exhibited significant correlations with the POC and MOC contents. After determining their topological roles, we identified the keystone taxa in the network. The results indicated that the most common bacterial taxa may result in SOC loss due to low C use efficiency, while specific fungal (Cephalotrichum) and protistan (Cercozoa) species could facilitate SOC fraction accumulation by promoting macroaggregate formation and predation. Therefore, the increase in keystone fungi and protists, as well as the reduction in bacteria, drove module 1 community function, which in turn promoted SOC sequestration under CT. These results strengthen our understanding of microbial functions in the accrual of SOC fractions, which contributes to the development of conservation agriculture on the Northeast China Plain.

show abstract

Section: Microbial Keystone Species-driven Soc Fraction Sequestration...mentioning

confidence: 99%

Conservation tillage facilitates the accumulation of soil organic carbon fractions by affecting the microbial community in an eolian sandy soil

Li,

Wang,

Qiu

et al. 2024

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…Studies have focused mainly on the effects of irrigation and plastic film mulching on soil moisture, soil nutrition, and crop yield, while ignoring their effects on the soil microscopic environment and the evolution of soil microorganisms [22]. Different irrigation systems can affect the migration transformation of mineral N, but how different irrigation systems affect soil denitrifying bacteria microorganisms, thereby affecting soil minerals N transformation, is not clear.…”

Section: Introductionmentioning

confidence: 99%

Response of Soil Nitrogen Components and nirK- and nirS-Type Denitrifying Bacterial Community Structures to Drip Irrigation Systems in the Semi-Arid Area of Northeast China

Qiang,

Wang,

et al. 2024

Agronomy

View full text Add to dashboard Cite

Denitrification is a key process in soil available nitrogen (N) loss. However, the effects of different water-saving irrigation systems on soil N components and denitrifying bacterial communities are still unclear. In this study, quantitative fluorescence PCR and Illumina MiSeq sequencing were used to investigate the effects of three main irrigation systems, conventional flooding irrigation (FP), shallow buried drip irrigation (DI), and mulched drip irrigation (MF), on the abundance, community composition, and diversity of soil nirK- and nirS-type denitrifying bacteria in the semi-arid area of Northeast China, and to clarify the driving factors of nirK- and nirS-type denitrifying bacterial community variations. The results showed that, compared with FP, MF significantly increased soil moisture, alkaline hydrolyzed nitrogen (AHN), nitrate nitrogen (NO3−-N), non-acid hydrolyzed nitrogen (AIN), and amino sugar nitrogen (ASN), but significantly decreased the contents of ammonium nitrogen (NH4+-N) and acid hydrolyzed ammonium nitrogen (AN). The irrigation system changed the relative abundance of the dominant genera of denitrifying bacteria, DI and MF significantly increased nitrate reductase (NR) and nitrite reductase (NiR) activities, and MF significantly increased the diversity of nirK- and nirS-type denitrifying bacteria but significantly decreased the richness. The community structure of nirK- and nirS-type denitrifying bacteria was significantly different among the three irrigation systems. NO3−-N was the main driving factor affecting the community structure of nirS-type denitrifying bacteria, and moisture significantly affected the community structure of nirK-type denitrifying bacteria. DI and MF significantly increased the abundance of nirK- and nirS-type denitrifying bacteria and also increased the abundance ratio of nirS/nirK genes. Therefore, although DI and MF significantly increased the abundance of denitrifying microorganisms, they did not lead to an increase in the N2O emission potential.

show abstract

Epichloë endophytes alter the soil microbial communities and soil metabolite profile after their host decomposition under salt stress

Wang,

Yang

et al. 2024

Plant Soil

View full text Add to dashboard Cite

Changes in soil bacterial and fungal community characteristics in response to long-term mulched drip irrigation in oasis agroecosystems

Cited by 6 publications

References 43 publications

Conservation tillage facilitates the accumulation of soil organic carbon fractions by affecting the microbial community in an eolian sandy soil

Conservation tillage facilitates the accumulation of soil organic carbon fractions by affecting the microbial community in an eolian sandy soil

Response of Soil Nitrogen Components and nirK- and nirS-Type Denitrifying Bacterial Community Structures to Drip Irrigation Systems in the Semi-Arid Area of Northeast China

Epichloë endophytes alter the soil microbial communities and soil metabolite profile after their host decomposition under salt stress

Contact Info

Product

Resources

About