Metagenomics reveals the response of desert steppe microbial communities and carbon-nitrogen cycling functional genes to nitrogen deposition

Ye, He; Zhao, Yu; He, Shilong; Wu, Zhendan; Yue, Mei; Hong, Mei

doi:10.3389/fmicb.2024.1369196

Cited by 4 publications

(1 citation statement)

References 68 publications

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“…After N fertilizer is applied, N can be degraded in four ways. These pathways include mineralization and deposition in the soil [18], absorption by plants and microorganisms [1, [19][20][21], entering surface water bodies [22], and release into the atmosphere [3][4][5]23]. The amount of N fertilizer needed by the soil ecosystem depends on several factors.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Farming Activities on Nitrogen Degradability under a Temperate Continental Monsoon Climate

Wang,

Zou,

Liu

et al. 2024

Agronomy

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Nutrient fertilizer application to agricultural land has led to greenhouse gas emissions and has altered soil nitrogen (N) deposition. In soil, N can be degraded in four ways: entering surface water through water flow, absorption by plants and microorganisms, decomposition into gas, and deposition as minerals. This study proposes the concept of N degradability and aims to clarify how farming activities affect N degradability in soil. Over 260 soil profiles were excavated, and the effective soil depth, coordinates, soil types, and vegetation were recorded at each measurement point. The following characteristics were determined in the soil samples: pH, organic matter, total N, total phosphorus, total potassium, total soluble N, available phosphorus, and available potassium. The sample characteristics were subjected to Pearson correlation analysis, principal component analysis, and one-way analysis of variance. The 260 samples included four soil types: dark brown soil, black soil, albic black soil, and meadow soil. Black soil exhibited more stable N levels compared with the other three soil types, showing a tendency towards N accumulation. Ground vegetation was categorized into seven types: forest, rice, maize, red adzuki bean, grassland, soybean, and others. Forests contributed the most to N deposition. Conversely, planting maize led to a tendency for N loss compared with forests. This study can provide a reference for the sustainable development of agriculture and the balance of ecological protection.

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Section: Introductionmentioning

confidence: 99%

Impacts of Farming Activities on Nitrogen Degradability under a Temperate Continental Monsoon Climate

Wang,

Zou,

Liu

et al. 2024

Agronomy

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show abstract

Linking main ecological clusters of soil bacterial–fungal networks and nitrogen cycling genes to crop yields under diverse cropping systems in the North China Plain

Yu,

Chen,

Wang

et al. 2024

Chem. Biol. Technol. Agric.

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Effects of pepper–maize intercropping on the physicochemical properties, microbial communities, and metabolites of rhizosphere and bulk soils

Chen,

Wang,

Chen

et al. 2024

Environmental Microbiome

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Background Intercropping increases land use efficiency and farmland ecological diversity. However, little is understood about whether and how soil biota, metabolites, and nutrients change under interspecific competition among plants. Thus, this study aimed to explore the changes in the physicochemical properties, microbial communities, and metabolites of rhizosphere and bulk soils of pepper monocropping and pepper–maize intercropping systems. Results Intercropping significantly increased the contents of available phosphorus (AP) and available potassium (AK), and decreased the pH value, whereas it had little effect on the total nitrogen (TN) and organic matter (OM) in the rhizosphere and bulk soils, compared with those in monocropping pepper. Moreover, the OM content was higher in rhizosphere soil than in bulk soil. The microbial community structures and metabolite profiles also differed between the two systems. The diversity of bacteria and fungi increased in intercropped pepper. The relative abundances of Actinobacteria , Chloroflexi , Cyanobacteria , and Ascomycota were higher while those of Proteobacteria , Planctomycetes , Mucoromycota , and Basidiomycota were significantly lower in the rhizosphere and bulk soils from the intercropping system than in those from the monocropping system. Linear discriminant analysis revealed that the predominant bacteria and fungi in the rhizosphere soil from the intercropping system belonged to the order Sphingomonadales and genera Nitrospira , Phycicoccus and Auricularia , whereas those in the bulk soil from the intercropping system belonged to the phylum Acidobacteria and genera Calocera , Pseudogymnoascus , and Trichosporon . Intercropping promoted the secretion of flavonoids, alkaloids, and nucleotides and their derivatives in the rhizosphere soil and significantly increased the contents of organoheterocyclic compounds in the bulk soil. Furthermore, the AP and AK contents, and pH value had strong positive correlations with bacteria. In addition, co-occurrence network analysis also showed that asebogenin, trachelanthamidine, 5-methyldeoxycytidine, and soil pH were the key factors mediating root-soil-microbe interactions. Conclusion Intercropping can alter microbial community structures and soil metabolite composition in rhizosphere and bulk soils, enhancing soil nutrient contents, enriching soil beneficial microbes and secondary metabolites (flavonoids and alkaloids) of intercropped pepper, and provided a scientific basis for sustainable development in the pepper-maize inter...

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Metagenomics reveals the response of desert steppe microbial communities and carbon-nitrogen cycling functional genes to nitrogen deposition

Cited by 4 publications

References 68 publications

Impacts of Farming Activities on Nitrogen Degradability under a Temperate Continental Monsoon Climate

Impacts of Farming Activities on Nitrogen Degradability under a Temperate Continental Monsoon Climate

Linking main ecological clusters of soil bacterial–fungal networks and nitrogen cycling genes to crop yields under diverse cropping systems in the North China Plain

Effects of pepper–maize intercropping on the physicochemical properties, microbial communities, and metabolites of rhizosphere and bulk soils

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