Effects of addition of nitrogen on soil fungal and bacterial biomass and carbon utilisation efficiency in a city lawn soil

Jiang, Xinyu; Cao, Lixue; Zhang, Renduo

doi:10.1071/sr13210

Cited by 7 publications

(4 citation statements)

References 57 publications

(60 reference statements)

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“…Members of this phylum have been associated with high abundance of recalcitrant compounds (Fierer et al, 2013), and their enhancement may be due to the loss of soil C through priming effect caused by addition of labile C sources via UNP and CSP. Previous studies reported that addition of easily degradable C sources into soil caused an enhanced degradation of native C sources due to the priming effect that led to a loss of C from soil (Bell et al, 2003; Jiang et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Wadduwage,

Liu,

Egidi

et al. 2023

J of Sust Agri & Env

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IntroductionDespite their potential benefits, it is not well understood how the application of biostimulants influences soil biological properties and their microbial communities in field conditions. In this study, we aimed to evaluate the impacts of biostimulants on soil biological and physicochemical properties relevant to soil health.Materials and MethodsTo achieve this, we conducted a field study to investigate the effects of two types of commercially available biostimulants, Universal Natural Plant food (UNP) and Converte Seed Primer (CSP), on microbial activity, bacterial and fungal abundance, community structure and diversity, and soil chemical and physical properties across two depths (0–10 and 10–20 cm) from five sites under either wheat or pasture cultivation.ResultsOur findings suggest that application of UNP stimulated microbial activity by 40.1% in surface (0–10 cm) and 36.4% in deeper (10–20 cm) soil, but was dependant on site. Effects were generally greater in grasslands compared with arable soils. At sites where UNP stimulated microbial respiration, substrate‐induced respiration was also stimulated in surface soils and was associated with increased soil moisture content and higher total carbon and nitrogen. At the one site where UNP was combined with CSP, soil enzymes associated with carbon and nitrogen cycling were stimulated in UNP and UNP + CSP treatments. Total bacterial and fungal abundance and their alpha diversity did not respond to biostimulant treatment. However, microbial indicator communities were identified that responded positively to UNP and CSP addition across the two depths. Bacterial indicator species included Elsterales, Propionibacteriales, Solibacterales, Candatus, Reyranellales and Sphingomonadales, but differed between depths. For the fungal indicator species Filobasidiales (Basidiomycota) and Pleosporales (Ascomycota) were strong responders and common across both depths.ConclusionOverall, our results suggest some positive effects of biostimulants on soil biological and physicochemical properties. Further long‐term studies should be conducted to evaluate the effects of biostimulants on crop yield and farm resilience.

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Section: Discussionmentioning

confidence: 99%

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Wadduwage,

Liu,

Egidi

et al. 2023

J of Sust Agri & Env

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“…Therefore, the change in soil pH might be the indirect controlling factor in regulating microbial community structure. Microbial PLFAs had a positive correlation with soil pH in our study, which is generally consistent with those identified in previous studies (Nicol et al ., ; Rousk et al ., ; Jiang et al ., ; Zhang et al ., ). According to the path analysis with SEM, the soil microbial community structure was determined mainly by soil pH, which accords with the result from the forest sites in Germany (Bååth & Anderson, ).…”

Section: Discussionmentioning

confidence: 97%

Response of soil microbial community structure to increased precipitation and nitrogen addition in a semiarid meadow steppe

Sun

Zhao

Xing

et al. 2017

European J Soil Science

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Additions of nitrogen (N) and water might have an interactive effect on the structure of the soil microbial community. The effects and importance of a fluctuating natural precipitation regime on the soil microbial community in a semiarid meadow steppe are very variable and less well known. On a Stipa baicalensis Rosh. meadow steppe, we used phospholipid fatty acid (PLFA) analysis to evaluate the effects of increased precipitation, addition of nitrogen and precipitation regime in regulating the structure of the microbial community. The experiment had a complete randomized block design with additions of N of 0, 5 and 10 g N m−2 year−1 and of water of 15 or 30% above the natural precipitation from 2010 to 2012. Additional water and number of years had interactive effects on the soil's microbial community structure. The indirect effects of water and N on soil properties such as pH might explain, at least in part, the changes in microbial groups. Additional water significantly decreased PLFAs for most microbial groups in the dry year, but had no effect in the wet year. The results reflected fluctuation in the natural precipitation regime during two hydrologically contrasting years. Changes in the structure of the soil microbial community might depend on variation in interannual precipitation on meadow steppe. Overall, this study emphasizes the importance of the precipitation regime for the soil's microbial community structure. Increases in natural precipitation will weaken the negative effects of nitrogen fertilizers on the grassland ecosystem in future. Highlights Effects of fluctuating natural precipitation and additions of nitrogen on soil's microbial community structure. Structure of soil's microbial community might depend on variation in interannual precipitation on meadow steppe. Increases in natural precipitation weaken the negative effects of nitrogen fertilizers on the grassland ecosystem. Precipitation regime has an important effect on soil's microbial community structure.

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“…GN and Sap regulated SOC by affecting on the activity of PER, which was involved in lignin degradation. However, some previous have reported that oxidases are produced directly by fungi (Jiang, Cao & Zhang, 2014; Zhang et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Microbial regulation of soil carbon properties under nitrogen addition and plant inputs removal

Cheng

Zhou

et al. 2019

PeerJ

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Background Soil microbial communities and their associated enzyme activities play key roles in carbon cycling in terrestrial ecosystems. Soil microbial communities are sensitive to resource availability, but the mechanisms of microbial regulation have not been thoroughly investigated. Here, we tested the mechanistic relationships between microbial responses and multiple interacting resources. Methods We examined soil carbon properties, soil microbial community structure and carbon-related functions under nitrogen addition and plant inputs removal (litter removal (NL), root trench and litter removal (NRL)) in a pure Larix principis-rupprechtii plantation in northern China. Results We found that nitrogen addition affected the soil microbial community structure, and that microbial biomass increased significantly once 100 kg ha−1 a−1 of nitrogen was added. The interactions between nitrogen addition and plant inputs removal significantly affected soil bacteria and their enzymatic activities (oxidases). The NL treatment enhanced soil microbial biomass under nitrogen addition. We also found that the biomass of gram-negative bacteria and saprotrophic fungi directly affected the soil microbial functions related to carbon turnover. The biomass of gram-negative bacteria and peroxidase activity were key factors controlling soil carbon dynamics. The interactions between nitrogen addition and plant inputs removal strengthened the correlation between the hydrolases and soil carbon. Conclusions This study showed that nitrogen addition and plant inputs removal could alter soil enzyme activities and further affect soil carbon turnover via microbial regulation. The increase in soil microbial biomass and the microbial regulation of soil carbon both need to be considered when developing effective sustainable forest management practices for northern China. Moreover, further studies are also needed to exactly understand how the complex interaction between the plant and below-ground processes affects the soil microbial community structure.

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Effects of addition of nitrogen on soil fungal and bacterial biomass and carbon utilisation efficiency in a city lawn soil

Cited by 7 publications

References 57 publications

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Response of soil microbial community structure to increased precipitation and nitrogen addition in a semiarid meadow steppe

Microbial regulation of soil carbon properties under nitrogen addition and plant inputs removal

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