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1. Air-drying changes the distribution of Hedley phosphorus pools in forest soils

Author:
WANG, Jipeng; WU, Yanhong; ZHOU, Jun; BING, Haijian; SUN, Hongyang; LUO, Ji; PU, Shengyan
Source:
Pedosphere 2020 v.30 no.2 pp. 272-284
ISSN:
1002-0160
Subject:
microbial biomass,   etc   ; air drying; annuals; forest types; fractionation; organic horizons; phosphorus; soil organic matter; solubility; China;     Show all 10 Subjects
Abstract:
... Hedley labile phosphorus (P) pools in soil tend to be several times larger than annual forest requirements, even in highly weathered soils characterized by P limitation. The discrepancy between plant and soil P status could be partly attributable to the frequently adopted air-drying pretreatment that tends to increase soil P solubility. In this study, the effects of air-drying on the distribution ...
DOI:
10.1016/S1002-0160(17)60456-9

2. Pectin drives microbial phosphorus solubilization in soil: Evidence from isolation-based and community-scale approaches

Author:
Mise, Kazumori; Koyama, Yuki; Matsumoto, Arisa; Fujita, Kazuki; Kunito, Takashi; Senoo, Keishi; Otsuka, Shigeto
Source:
European journal of soil biology 2020 v.97 pp. 103169
ISSN:
1164-5563
Subject:
microbial biomass,   etc   ; coevolution; genes; genomics; metal ions; oxides; pectins; phosphates; phosphorus; rhizosphere; soil; soil microorganisms; solubilization;     Show all 13 Subjects
Abstract:
... A considerable part of soil phosphorus is bound to metal cations or metal oxides, and cannot be used in these forms by soil microbes and plants. Phosphate-solubilizing bacteria (PSB) are abundant in pectin-rich rhizosphere, and their pectin-degrading activity has been reported. Therefore, we hypothesized that pectin activates PSB and promotes soil phosphorus solubilization. To test this hypothesis ...
DOI:
10.1016/j.ejsobi.2020.103169

3. Cellular and extracellular C contributions to respiration after wetting dry soil

Author:
Slessarev, Eric W.; Lin, Yang; Jiménez, Beatrix Y.; Homyak, Peter M.; Chadwick, Oliver A.; D’Antonio, Carla M.; Schimel, Joshua P.
Source:
Biogeochemistry 2020 v.147 no.3 pp. 307-324
ISSN:
0168-2563
Subject:
microbial biomass,   etc   ; amino acids; carbon dioxide; iron; microorganisms; subsoil; total organic carbon; trehalose; California;     Show all 9 Subjects
Abstract:
... Wetting of dry soil triggers a pulse of microbial respiration that has been attributed to two broad mechanisms: (1) recycling of microbial cellular carbon (C), and (2) consumption of extracellular organic C made available to microbes by wetting. We evaluated these two mechanisms by measuring cumulative CO₂ release, changes in the size and chemical composition of microbial biomass, and water-extrac ...
DOI:
10.1007/s10533-020-00645-y

4. Quantification of Mineralizable Pool of Organic Matter in Tundra Cryosols of Kolyma Lowland

Author:
Khodzhaeva, A. K.; Shatilovich, A. V.; Gubin, S. V.; Lupachev, A. V.
Source:
Eurasian soil science 2020 v.53 no.2 pp. 215-222
ISSN:
1064-2293
Subject:
microbial biomass,   etc   ; Cryosols; microbial carbon; mineralization; organic horizons; porosity; temperature; total nitrogen; total organic carbon; tundra;     Show all 10 Subjects
Abstract:
... The cryogenic mass-exchange processes affect the content and distribution of organic matter in Cryosol profiles enriching the mineral horizons with organic matter. It has been shown that the mineralization capacity of organic materials in Cryosols is low even under optimum conditions of temperature and moisture. Despite the significant variation in the microbial biomass content, the general patter ...
DOI:
10.1134/S1064229320020076

5. Total soil organic carbon increases but becomes more labile after afforestation in China’s Loess Plateau

Author:
Zhang, Qingyin; Jia, Xiaoxu; Wei, Xiaorong; Shao, Mingan; Li, Tongchuan; Yu, Qiang
Source:
Forest ecology and management 2020 v.461 pp. 117911
ISSN:
0378-1127
Subject:
microbial biomass,   etc   ; afforestation; carbon sequestration; cropland; dissolved organic carbon; land use; mixed forests; soil depth; soil organic carbon; China;     Show all 10 Subjects
Abstract:
... Afforestation of cropland is recommended as an effective approach to enhance soil organic carbon (SOC) sequestration and labile organic C fractions. However, the stabilization of SOC and its labile organic C fractions on the Loess Plateau is largely unknown. Our objective was to quantify total SOC concentration and labile organic C fractions in the 0–20 cm soil depth for four land use types on the ...
DOI:
10.1016/j.foreco.2020.117911

6. Review on pulp and paper activated sludge pretreatment, inhibitory effects and detoxification strategies for biovalorization

Author:
Kaur, Rajwinder; Tyagi, Rajeshwar Dayal; Zhang, Xiaolei
Source:
Environmental research 2020 v.182 pp. 109094
ISSN:
0013-9351
Subject:
microbial biomass,   etc   ; activated sludge; cellulose; enzymes; fermentation; hemicellulose; hydrolysis; lignin; lignocellulose; microorganisms; paper; pulp; sugars; toxic substances; value-added products;     Show all 15 Subjects
Abstract:
... Biovalorization of pulp and paper activated sludge to value-added products could be an effective alternative to traditional sludge management methods, which tend to pose serious environmental issues. Since pulp and paper activated sludge consists of microbial biomass, cellulose, hemicellulose and lignin and thus, could be subjected to different hydrolysis methods to solubilize sludge solids and re ...
DOI:
10.1016/j.envres.2019.109094

7. Dynamics, Structure, and Functional Activity of Microbial Biomass in Soils of Restoring Felled Areas in Fir Forests of the Yenisei Ridge

Author:
Bogorodskaya, A. V.; Shishikin, A. S.
Source:
Eurasian soil science 2020 v.53 no.1 pp. 126-136
ISSN:
1064-2293
Subject:
microbial biomass,   etc   ; Betula; bacteria; carbon; carbon dioxide; carbon dioxide production; deciduous forests; felling; fungi; soil horizons; taiga;     Show all 11 Subjects
Abstract:
... The dynamics, structure, and functional activity of microbial biomass have been studied in soils of felling areas in southern taiga fir forests (the Yenisei Ridge, Krasnoyarsk krai), which are at different stages of natural regenerative successions. The top organomineral horizons of soddy-podzolic soil (Albic Glossic Retisol (Loamic, Cutanic, Ochric)) of the after-felling regeneration succession ( ...
DOI:
10.1134/S1064229320010056

8. Fast pyrolysis with fractional condensation of lignin-rich digested stillage from second-generation bioethanol production

Author:
Priharto, Neil; Ronsse, Frederik; Yildiz, Güray; Heeres, Hero Jan; Deuss, Peter J.; Prins, Wolter
Source:
Journal of analytical and applied pyrolysis 2020 v.145 pp. 104756
ISSN:
0165-2370
Subject:
microbial biomass,   etc   ; condensation (phase transition); ethanol production; feedstocks; fluidized beds; lignin; liquids; polysaccharides; pyrolysis; pyrolysis oils; vapors; wastes;     Show all 12 Subjects
Abstract:
... Poplar-derived lignin-rich feedstock (i.e. stillage) obtained from bioethanol production was subjected to fast pyrolysis in a modified fluidised bed reactor at 430 °C, 480 °C, and 530 °C. The stillage was pretreated by enzymatic digestion prior to fast pyrolysis. Pyrolysis vapors were collected by fractional condensation to separate the heavy organic and aqueous phase liquids. The intention of thi ...
DOI:
10.1016/j.jaap.2019.104756

9. Effects of lead (Pb) in stormwater runoff on the microbial characteristics and organics removal in bioretention systems

Author:
Liu, Cheng; Lu, Jie; Liu, Jiaqi; Mehmood, Tariq; Chen, Wei
Source:
Chemosphere 2020 v.253 pp. 126721
ISSN:
0045-6535
Subject:
microbial biomass,   etc   ; bacteria; biodegradation; bioretention areas; chemical oxygen demand; community structure; heavy metals; lead; microbial activity; organic matter; pollutants; pollution control; soil; stormwater;     Show all 14 Subjects
Abstract:
... Bioretention systems have been proved to be a natural approach for effectively reducing stormwater runoff pollution loads. However, the effects of heavy metals in stormwater runoff on microbial characteristics and organics removal in bioretention systems are unclear. In this study, two lab scale bioretention columns including the control and lead (Pb) treatment with the soil and filler layer were ...
DOI:
10.1016/j.chemosphere.2020.126721

10. Rewetting of soil: Revisiting the origin of soil CO2 emissions

Author:
Barnard, Romain L.; Blazewicz, Steven J.; Firestone, Mary K.
Source:
Soil biology & biochemistry 2020 v.147 pp. 107819
ISSN:
0038-0717
Subject:
microbial biomass,   etc   ; biochemistry; carbon; carbon dioxide; carbon sinks; climate change; greenhouse gas emissions; microbial activity; microbial ecology; mineralization; soil biology; soil carbon; soil physical properties; soil-plant interactions;     Show all 14 Subjects
Abstract:
... Rewetting dry soils is associated with a burst of microbial activity and mineralization, which manifests itself as a pulse in soil CO₂ emissions, long-known as the Birch effect. In arid and semi-arid systems, soil CO₂ losses upon rewetting at the end of extended dry periods can contribute a significant fraction to the overall carbon (C) budget. Microbial biomass is one of the sources of mineralize ...
DOI:
10.1016/j.soilbio.2020.107819

11. Hyperspectral imaging for high-resolution mapping of soil carbon fractions in intact paddy soil profiles with multivariate techniques and variable selection

Author:
Xu, Shengxiang; Wang, Meiyan; Shi, Xuezheng
Source:
Geoderma 2020 v.370 pp. 114358
ISSN:
0016-7061
Subject:
microbial biomass,   etc   ; dissolved organic carbon; hyperspectral imagery; least squares; neural networks; normal distribution; paddy soils; prediction; soil organic carbon; soil profiles; soil quality; spectroscopy; support vector machines;     Show all 13 Subjects
Abstract:
... Soil organic carbon (SOC) and its labile C fractions play a central role in soil quality and C cycles. This study aimed to investigate the potential of laboratory-based hyperspectral imaging (HSI) spectroscopy to predict and map SOC and its labile C fractions (e.g., dissolved organic C, DOC; readily oxidizable organic C, ROC; and microbial biomass C, MBC) in soil profiles with a high resolution. T ...
DOI:
10.1016/j.geoderma.2020.114358

12. Changes in N supply pathways under different long-term fertilization regimes in Northeast China

Author:
Ma, Qiang; Li, Shuailin; Xu, Zhiqiang; Fan, Shaobo; Xia, Zhuqing; Zhou, Changrui; Zhu, Mengmeng; Yu, Wantai
Source:
Soil & tillage research 2020 v.201 pp. 104609
ISSN:
0167-1987
Subject:
microbial biomass,   etc   ; ammonium; clay; clay minerals; corn; fertilizer application; long term experiments; mineral content; mineralization; nitrogen cycle; nutrient use efficiency; organic matter; soil; soil microorganisms; China;     Show all 15 Subjects
Abstract:
... Different long-term fertilization regimes probably influence N supplying capacity and N cycling processes in soils. However, the effects of fertilization regimes on the pathways of N retention and supply and the impacts of these pathways on crop N uptake remain undocumented. In this study, the contributions of different pathways to N retention and supply were investigated on the basis of a long-te ...
DOI:
10.1016/j.still.2020.104609

13. Microbial carbon use efficiency in grassland soils subjected to nitrogen and phosphorus additions

Author:
Widdig, Meike; Schleuss, Per-M.; Biederman, Lori A.; Borer, Elizabeth T.; Crawley, Michael J.; Kirkman, Kevin P.; Seabloom, Eric W.; Wragg, Peter D.; Spohn, Marie
Source:
Soil biology & biochemistry 2020 v.146 pp. 107815
ISSN:
0038-0717
Subject:
microbial biomass,   etc   ; atmospheric precipitation; carbon sequestration; grassland soils; microbial carbon; microorganisms; nitrogen; phosphorus; sand fraction; temperature; terrestrial ecosystems; topsoil; South Africa; United Kingdom; United States;     Show all 15 Subjects
Abstract:
... Soil microbial carbon use efficiency (CUE), defined as the ratio between carbon (C) allocated to growth and C taken up by microorganisms, is pivotal for the understanding of C cycling in terrestrial ecosystems. Soil microbial CUE is thought to increase under nitrogen (N) addition, thereby mediating the effects of atmospheric N deposition on C cycling in soils. We studied the effects of N, phosphor ...
DOI:
10.1016/j.soilbio.2020.107815

14. Rhizosphere-enhanced biosurfactant action on slowly desorbing PAHs in contaminated soil

Author:
Posada-Baquero, Rosa; Jiménez-Volkerink, Sara Nienke; García, José Luis; Vila, Joaquim; Cantos, Manuel; Grifoll, Magdalena; Ortega-Calvo, Jose Julio
Source:
The Science of the total environment 2020 v.720 pp. 137608
ISSN:
0048-9697
Subject:
microbial biomass,   etc   ; Helianthus annuus; bioavailability; biodegradation; bioremediation; biosurfactants; community structure; desorption; ecophysiology; greenhouse production; greenhouses; ontogeny; polluted soils; polycyclic aromatic hydrocarbons; rhamnolipids; rhizosphere; slurries; soil bacteria;     Show all 18 Subjects
Abstract:
... We studied how sunflower plants affect rhamnolipid biosurfactant mobilization of slowly desorbing fractions of polycyclic aromatic hydrocarbons (PAHs) in soil from a creosote-contaminated site. Desorption kinetics of 13 individual PAHs revealed that the soil contained initially up to 50% slowly desorbing fractions. A rhamnolipid biosurfactant was applied to the soil at the completion of the sunflo ...
DOI:
10.1016/j.scitotenv.2020.137608

15. Environmentally relevant concentrations of silver nanoparticles diminish soil microbial biomass but do not alter enzyme activities or microbial diversity

Author:
de Oca-Vásquez, Gabriela Montes; Montes de Oca-Vásquez, Gabriela; Solano-Campos, Frank; Vega-Baudrit, José R.; López-Mondéjar, Rubén; Odriozola, Iñaki; Vera, Alfonso; Moreno, José L.; Bastida, Felipe
Source:
Journal of hazardous materials 2020 v.391 pp. 122224
ISSN:
0304-3894
Subject:
microbial biomass,   etc   ; Coffea arabica; antimicrobial properties; biogeochemical cycles; community structure; enzyme activity; extracellular enzymes; fungal communities; management systems; nanosilver; physicochemical properties; soil ecosystems; soil microorganisms; tropical soils;     Show all 14 Subjects
Abstract:
... The increasing use of silver nanoparticles (AgNPs) due to their well-known antimicrobial activity, has led to their accumulation in soil ecosystems. However, the impact of environmental realistic concentrations of AgNPs on the soil microbial community has been scarcely studied. In this work, we have assessed the impact of AgNPs, that mimic real concentrations in nature, on tropical soils cultivate ...
DOI:
10.1016/j.jhazmat.2020.122224

16. Balanced nutrient stoichiometry of organic amendments enhances carbon priming in a poorly structured sodic subsoil

Author:
Fang, Yunying; Singh, Bhupinder Pal; Farrell, Mark; Van Zwieten, Lukas; Armstrong, Roger; Chen, Chengrong; Bahadori, Mohammad; Tavakkoli, Ehsan
Source:
Soil biology & biochemistry 2020 v.145 pp. 107800
ISSN:
0038-0717
Subject:
microbial biomass,   etc   ; carbon sequestration; crop yield; dissolved organic carbon; gypsum; labile carbon; mineralization; mining; nitrogen; nutrients; phosphorus; soil minerals; stoichiometry; stubble; subsoil; sugarcane bagasse;     Show all 16 Subjects
Abstract:
... Application of organic amendments (OAs), nutrients and gypsum to sodic subsoils is of great interest to improve soil functionality and crop yield. However, controversy remains about the impact of the priming effect (PE) on native soil organic carbon (SOC), and the mechanisms governing the dynamics of the PE by OAs (with variations in nutrient stoichiometry). To address these gaps in knowledge, thi ...
DOI:
10.1016/j.soilbio.2020.107800

17. Modeling the processes of soil moisture in regulating microbial and carbon-nitrogen cycling

Author:
Wang, Gangsheng; Huang, Wenjuan; Zhou, Guoyi; Mayes, Melanie A.; Zhou, Jizhong
Source:
Journal of hydrology 2020 v.585 pp. 124777
ISSN:
0022-1694
Subject:
microbial biomass,   etc   ; ammonium; carbon nitrogen ratio; climate; dormancy; environmental factors; microbial physiology; nitrates; nitrogen; nitrogen cycle; simulation models; soil carbon; soil organic matter; soil temperature; soil water; stoichiometry;     Show all 16 Subjects
Abstract:
... Soil carbon (C) and nitrogen (N) cycles and their complex responses to hydro-climatic forcing have gained increasing attention. While the temperature effects have been intensively studied, soil moisture response functions (SMRFs) are not well documented for various microbial and enzymatic processes due to the difficulties in directly measuring and differentiating the moisture effects on various pr ...
DOI:
10.1016/j.jhydrol.2020.124777

18. The T-shirt microbiome is distinct between individuals and shaped by washing and fabric type

Author:
Sterndorff, Eva Baggesgaard; Russel, Jakob; Jakobsen, Jonas; Mortensen, Martin Steen; Gori, Klaus; Herschend, Jakob; Burmølle, Mette
Source:
Environmental research 2020 v.185 pp. 109449
ISSN:
0013-9351
Subject:
microbial biomass,   etc   ; Acinetobacter; DNA; bacteria; clothing; cotton fabric; detergents; genes; laundry; males; microbial communities; microbiome; odors; polyesters; quantitative polymerase chain reaction; ribosomal RNA; sequence analysis; washing;     Show all 18 Subjects
Abstract:
... Activity of the microbial population in clothing causes unpleasant odor and textile deterioration. However, little is known about how the textile microbial community is shaped. In this study, we developed a method for extracting DNA from small amounts of detergent-washed clothing, and applied it to both worn and unworn, washed and unwashed cotton and polyester samples of the axillary region of T-s ...
DOI:
10.1016/j.envres.2020.109449

19. Comparative assessment of polymeric and other nanoparticles impacts on soil microbial and biochemical properties

Author:
Xin, Xiaoping; Zhao, Fengliang; Zhao, Haiming; Goodrich, Sofia L.; Hill, Megan R.; Sumerlin, Brent S.; Stoffella, Peter J.; Wright, Alan L.; He, Zhenli
Source:
Geoderma 2020 v.367 pp. 114278
ISSN:
0016-7061
Subject:
microbial biomass,   etc   ; Alfisols; Spodosols; agroecosystems; application rate; biochemical pathways; carbon nanotubes; ecotoxicology; environmental health; enzyme inhibition; food safety; guidelines; nanoparticles; polymers; principal component analysis; soil properties; urease;     Show all 17 Subjects
Abstract:
... Interest has been generated in nanotechnology application in agricultural and food systems and understanding ecotoxicity of nanoparticles (NPs) is imperative for ecosystem health and food safety. This study compared the dose-effects of newly synthesized polysuccinimide NPs (PSI-NPs) with multi-walled carbon nanotubes (MWCNTs), nano-Ag and nano-TiO₂, on soil microbiological and biochemical processe ...
DOI:
10.1016/j.geoderma.2020.114278

20. Wild boar grubbing causes organic carbon loss from both top- and sub-soil in an oak forest in central China

Author:
Liu, Yanchun; Liu, Xiaojing; Yang, Zhongling; Li, Guoyong; Liu, Shirong
Source:
Forest ecology and management 2020 v.464 pp. 118059
ISSN:
0378-1127
Subject:
microbial biomass,   etc   ; Quercus; bioturbation; carbon dioxide; carbon sequestration; ecological footprint; forest ecosystems; forests; greenhouse gas emissions; soil depth; soil organic carbon; soil respiration; subsoil; temperature; wild boars; China;     Show all 16 Subjects
Abstract:
... Soil disturbances by large animals are known to affect soil carbon (C) storage and thus have the potential to change ecosystem functioning in forests. However, little is known about the effects of wild boar grubbing on soil CO₂ emission in forest ecosystems. Here we investigated soil respiration and soil physico-chemical properties of top- (0–10 cm) and sub-soil (10–20 cm) on the paired grubbed an ...
DOI:
10.1016/j.foreco.2020.118059