Arbuscular mycorrhizal fungi promote litter decomposition and alleviate nutrient limitations of soil microbes under warming and nitrogen application

Mei, Linlin; Zhang, Pan; Cui, Guowen; Yang, Xue; Zhang, Tao; Guo, Jixun

doi:10.1016/j.apsoil.2021.104318

Cited by 31 publications

(15 citation statements)

References 77 publications

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“…Plant litter is an important part of forest ecosystems, acting as a link between plants and soil [1,2], while influencing the natural regeneration of forests and accompanying tree growth [3][4][5]. However, available research on forest litter has mostly focused on litter decomposition [6][7][8], litterfall production, litterfall dynamics [9][10][11], ecological function of litter, such as how litter influences soil and water conservation [12,13], and nutrient cycling [14,15]. Litter cover is a rarely studies as a factor that affect the natural regeneration, although it is the first physical environment that seeds immediately encounter after they land on the ground [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Meta-Analysis of Effects of Forest Litter on Seedling Establishment

Wang

Liu

et al. 2022

Forests

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Litter plays an important role in seedling establishment (emergence, survival, and early growth). Here, we performed a meta-analysis on 404 datasets from 33 independent studies to analyze the effects of litter cover on seedling emergence, survival, height, and biomass (root, stem, leaf, and total). Each dataset was stratified according to experimental conditions, litter type (broadleaf versus needle litter), litter amount (thickness), and seed size. The results showed that litter cover had an overall negative effect on seedling emergence and survival, a neutral effect on root, leaf, total biomass, and a positive effect on stem biomass and seedling height than the no-litter cover control. Compared to thin (<250 g m−2) and medium (250–500 g m−2) litter layers, thick litter (>500 g m−2) was more detrimental for seedling emergence, survival, and total biomass, which could be an adaptation mechanism to prevent the growth of young seedling among high densities of other plants (trees). Broadleaf litter cover had a stronger negative effect on seedling emergence and total biomass than needle litter. Litter cover had a stronger negative effect on emergence of small seeds than on emergence of larger seeds. Similarly, litter cover had a stronger overall negative effect on seedling emergence than on seedling survival. In field and common garden experiments, litter effects were negative for emergence and positive for total biomass. In glasshouse and germination chamber experiments, litter effects were negative for emergence, survival and total biomass. These findings would contribute to advancements in forest management, improving conservation and restoration efforts.

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Section: Introductionmentioning

confidence: 99%

Meta-Analysis of Effects of Forest Litter on Seedling Establishment

Wang

Liu

et al. 2022

Forests

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“…It controls nutrient cycling and energy ow by releasing nutrients from organic matter and transforming them into inorganic forms (Gui et al 2017). Traditionally, litter decomposition is regulated by litter quality (in terms of lignin and N content) (Zhang et al 2016;Hong et al 2021) and climatic factors such as temperature, water availability and soil acidity (Fernandez et al 2017;Cao et al 2022; Mei et al 2022). However, recent studies suggest that litter quality and climatic factors do not fully explain decomposition, and the species, richness and diversity of decomposer microorganism may also exert strong controls on decomposition (Herzog et Arbuscular mycorrhizal fungi (AMF) form associations with > 80% of terrestrial plant species (Smith and Smith 2011) and obtain photosynthates from their host plants and deliver nutrients, such as nitrogen (N) and phosphorus (P), for their hosts (Brundrett and Tedersoo 2018).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi influence decomposition and the litter microbial community under saline-alkali conditions

Liu

Zhang

et al. 2023

Preprint

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Recent studies have indicated that arbuscular mycorrhizal fungi (AMF) can influence decomposition of organic materials. However, the underlying mechanisms remain unclear. Here we investigated whether AMF influence the decomposition of leaf litters and change the associated litter bacterial and fungal communities and whether this effect is altered by the level of soil saline-alkali. A pot experiment was conducted using Trifolium repens as host plant without or with AMF (Funneliformis mosseae) and with two levels of soil saline-alkali (0 and 200 mmol/L). Litterbags with different mesh size were used to measure the effect of AMF on decomposition. Our study found that AMF significantly accelerated litter decomposition under both non-saline-alkali and saline-alkali conditions. The composition of bacterial and fungal communities were also altered by AMF independent of soil saline-alkali conditions. For bacterial community, AMF increased the richness but not the diversity and increased the relative abundance of Firmicutes and Nitrospirota. For fungal community, the richness and diversity were higher in AMF than in non-AMF treatment. And AMF significantly resulted in a decrease of the relative abundance of Ascomycota but an increase of the relative abundance of Basidiomycota, Chytridiomycota, Mortierellomycota and Rozellomycota. Structural equation modelling (SEM) showed that AMF increased litter decomposition under saline-alkali conditions primarily by affecting bacterial community composition. Together, we show that AMF increase decomposition and alter the bacterial and fungal communities, and that these effects are not modulated by the level of soil saline-alkali.

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“…Soil microorganisms are the primary driving forces in several key ecosystem processes, including soil structure formation, nutrient cycling, organic substance decomposition, and other soil biochemical processes; thus, soil microorganisms may help in monitoring soil fertility and health (Xiang et al, 2020 ; Vidal et al, 2021 ). Soil fungi are one of the most common soil microorganisms and important decomposers in the soil environment because they metabolize and transform organic matter for plant uptake by secreting specific extracellular enzymes (Mei et al, 2022 ). Therefore, changes in the key species involved in nutrient cycling can also affect soil fertility (De Beeck et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Combined Application of Manure and Chemical Fertilizers Alters Soil Environmental Variables and Improves Soil Fungal Community Composition and Rice Grain Yield

et al. 2022

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Soil microorganisms play vital roles in energy flow and soil nutrient cycling and, thus, are important for crop production. A detailed understanding of the complex responses of microbial communities to diverse organic manure and chemical fertilizers (CFs) is crucial for agroecosystem sustainability. However, little is known about the response of soil fungal communities and soil nutrients to manure and CFs, especially under double-rice cropping systems. In this study, we investigated the effects of the application of combined manure and CFs to various fertilization strategies, such as no N fertilizer (Neg-CF); 100% chemical fertilizer (Pos-CF); 60% cattle manure (CM) + 40% CF (high-CM); 30% CM + 70% CF (low-CM); 60% poultry manure (PM) + 40% CF (high-PM), and 30% PM + 70% CF (low-PM) on soil fungal communities' structure and diversity, soil environmental variables, and rice yield. Results showed that synthetic fertilizer plus manure addition significantly increased the soil fertility and rice grain yield compared to sole CFs' application. Moreover, the addition of manure significantly changed the soil fungal community structure and increased the relative abundance of fungi such as phyla Ascomycota, Basidiomycota, Mortierellomycota, and Rozellomycota. The relative abundances dramatically differed at each taxonomic level, especially between manured and non-manured regimes. Principal coordinates analysis (PCoA) exhibited greater impacts of the addition of manure amendments than CFs on fungal community distributions. Redundancy analysis showed that the dominant fungal phyla were positively correlated with soil pH, soil organic C (SOC), total N, and microbial biomass C, and the fungal community structure was strongly affected by SOC. Network analysis explored positive relationships between microorganisms and could increase their adaptability in relevant environments. In addition, the structural equation model (SEM) shows the relationship between microbial biomass, soil nutrients, and rice grain yield. The SEM showed that soil nutrient contents and their availability directly affect rice grain yield, while soil fungi indirectly affect grain yield through microbial biomass production and nutrient levels. Our results suggest that manure application combined with CFs altered soil biochemical traits and soil fungal community structure and counteracted some of the adverse effects of the synthetic fertilizer. Overall, the findings of this research suggest that the integrated application of CF and manure is a better approach for improving soil health and rice yield.

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Arbuscular mycorrhizal fungi promote litter decomposition and alleviate nutrient limitations of soil microbes under warming and nitrogen application

Cited by 31 publications

References 77 publications

Meta-Analysis of Effects of Forest Litter on Seedling Establishment

Meta-Analysis of Effects of Forest Litter on Seedling Establishment

Arbuscular mycorrhizal fungi influence decomposition and the litter microbial community under saline-alkali conditions

Combined Application of Manure and Chemical Fertilizers Alters Soil Environmental Variables and Improves Soil Fungal Community Composition and Rice Grain Yield

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