15,609 results match your criteria nitrogen application


Integration of swine manure anaerobic digestion and digestate nutrients removal/recovery under a circular economy concept.

J Environ Manage 2021 Sep 24;301:113825. Epub 2021 Sep 24.

Universidade Federal da Fronteira Sul, 99700-000, Erechim, RS, Brazil; Universidade Estadual Do Oeste Do Paraná, 85819-110, Cascavel, PR, Brazil; Embrapa Suínos e Aves, 89715-899, Concórdia, SC, Brazil. Electronic address:

The application of the circular economy concept should utilize the cycles of nature to preserve materials, energy and nutrients for economic use. A full-scale pig farm plant was developed and validated, showing how it is possible to integrate a circular economy concept into a wastewater treatment system capable of recovering energy, nutrients and enabling water reuse. A low-cost swine wastewater treatment system consisting of several treatment modules such as solid-liquid separation, anaerobic digestion, biological nitrogen removal by nitrification/denitrification and physicochemical phosphorus removal and recovery was able to generate 1880. Read More

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September 2021

Ammonium regulates redox homeostasis and photosynthetic ability to mitigate copper toxicity in wheat seedlings.

Ecotoxicol Environ Saf 2021 Sep 24;226:112825. Epub 2021 Sep 24.

Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China.

As an essential plant micronutrient, copper (Cu) is required as a component of several enzymes, but it can be highly toxic to plants when present in excess quantities. Nitrogen (N) application can help to alleviate the phytotoxic effects of heavy metals, including Cu, and different N forms significantly affect the uptake and accumulation of heavy metals in plants. The aim of this study was to determine the effects of different N forms, i. Read More

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September 2021

Melatonin enhances drought stress tolerance in maize through coordinated regulation of carbon and nitrogen assimilation.

Plant Physiol Biochem 2021 Sep 8;167:958-969. Epub 2021 Sep 8.

College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, 030800, China. Electronic address:

Melatonin is a pleiotropic regulatory molecule in plants and is involved in regulating plant tolerance to drought stress. Here, we conducted transcriptomic and physiological analyses to identify metabolic processes associated with the enhanced tolerance of the melatonin-treated maize (Zea mays L.) seedlings to water deficit. Read More

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September 2021

Biochar and alternate wetting-drying cycles improving rhizosphere soil nutrients availability and tobacco growth by altering root growth strategy in Ferralsol and Anthrosol.

Sci Total Environ 2021 Sep 22;806(Pt 1):150513. Epub 2021 Sep 22.

Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark; Sino-Danish Center for Education and Research, Eastern Yanqihu Campus, University of Chinese Academy of Sciences, 380 Huaibeizhuang, 101400 Beijing, China. Electronic address:

Biochar has been advocated as a sustainable and eco-friendly practice to improve soil fertility and crop productivity which could aid in the mitigation of climate change. Nonetheless, the combined effects of biochar and irrigation on tobacco growth and soil nutrients in diverse soil types have been incompletely explored. We applied a split-root experiment to investigate the impacts of amendment with 2% softwood- (WBC) and wheat-straw biochar (SBC) on growth responses and rhizosphere soil nutrients availability of tobacco plants grown in a Ferralsol and an Anthrosol. Read More

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September 2021

Two-stage microbial fuel cell (MFC) and membrane bioreactor (MBR) system for enhancing wastewater treatment and resource recovery based on MFC as a biosensor.

Environ Res 2021 Sep 24:112089. Epub 2021 Sep 24.

Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Science, Lanzhou University, 222 South Tianshui Rd, Lanzhou, Gansu, 730000, PR China. Electronic address:

Lack of process control between the two stages of a combined microbial fuel cell-membrane bioreactor (MFC-MBR) system limits its application in wastewater treatment due to membrane fouling and high energy consumption. In this study, a two-stage MFC-MBR integrated system was established to investigate the impact of incorporating process control on petroleum refinery wastewater treatment. The results showed that chemical oxygen demand (COD) removal exhibits a linear relationship with the MFC voltage output (R = 0. Read More

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September 2021

Gene Fitness of Under Diazotrophic Growth.

J Bacteriol 2021 Sep 27:JB0040421. Epub 2021 Sep 27.

Department of Bioproducts and Biosystems Engineering.

is a nitrogen-fixing free-living soil microbe that has been studied for decades in relation to biological nitrogen fixation (BNF). It is highly amenable to genetic manipulation, helping to unravel the intricate importance of different proteins involved in the process of BNF, including the biosynthesis of cofactors that are essential to assembling the complex metal cofactors that catalyze the difficult reaction of nitrogen fixation. Additionally, accomplishes this feat while growing as an obligate aerobe, differentiating it from many of the nitrogen-fixing bacteria that are associated with plant roots. Read More

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September 2021

Regulation of nitrogen configurations and content in 3D porous carbons for improved lithium storage.

Dalton Trans 2021 Sep 27. Epub 2021 Sep 27.

Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, Qinzhou Key Laboratory for Development and Application of High Performance Functional Materials, Beibu Gulf University, Qinzhou, 535011, China.

The incorporation of active nitrogen species in carbon materials has been widely demonstrated as a viable means to produce superior lithium storage materials, while the precise regulation of nitrogen configurations as well as their content still remains a formidable challenge. Herein, nitrogen-free porous carbon frameworks were synthesized by a self-templating strategy from disodium citrate, and post-annealing yielded 10.4 at% N that was primarily pyrrolic-N and pyridinic-N with an atomic ratio of about 3 : 1, with negligible inactive graphitic-N. Read More

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September 2021

Effects of nitrogen supply rate on photosynthesis, nitrogen uptake and growth of seedlings in a Eucalyptus/Dalbergia odorifera intercropping system.

Plant Biol (Stuttg) 2021 Sep 26. Epub 2021 Sep 26.

College of Forestry, Guangxi University, Nanning, Guangxi, China.

The introduction of N -fixing species into a Eucalyptus plantation resulted in a successful planting system. It is essential to understand the contribution of nitrogen (N) competition and photosynthetic efficiency to plant dry matter yield to shed more light on the growth mechanism of the Eucalyptus/legume system. We compared N competition, photosynthesis and dry matter yield of Eucalyptus urophylla × E. Read More

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September 2021

Agricultural management and cultivation period alter soil enzymatic activity and bacterial diversity in litchi (Litchi chinensis Sonn.) orchards.

Bot Stud 2021 Sep 26;62(1):13. Epub 2021 Sep 26.

Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan.

Background: Agricultural management and temporal change including climate conditions and soil properties can result in the alteration of soil enzymatic activity and bacterial community, respectively. Therefore, different agricultural practices have been used globally to explore the soil quality. In this study, the temporal variations in soil property, enzymatic activity, and bacterial community at three successive trimester sampling intervals were performed in the soil samples of litchi orchards that were maintained under conventional and sustainable agricultural practices. Read More

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September 2021

Comprehensive Analysis of the Influence of Fulvic Acid from Paper Mill Effluent on Soil Properties, Soil Microbiome, and Growth of Rehd. Seedlings under Replant Conditions.

ACS Omega 2021 Sep 10;6(37):24027-24038. Epub 2021 Sep 10.

College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, China.

In this study, the potential regulatory effects of fulvic acid extracted from paper mill effluent (PFA) in apple replant disease (ARD) were investigated through a comprehensive experimental evaluation of the effects of PFA on soil properties, growth inhibition of apple replant pathogens, and growth of replanted Rehd. seedlings. PFA with a relatively lower molecular weight was mainly composed of carbohydrates, lignin derivatives, and polysaccharides and was rich in functional groups such as carboxyl and phenolic hydroxyl groups. Read More

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September 2021

Optimizing interaction between crop residues and inorganic N under zero tillage systems in sub-humid region of Kenya.

Heliyon 2021 Sep 11;7(9):e07908. Epub 2021 Sep 11.

Alliance of Bioversity International and the International Center for Tropical Agriculture, c/o International Centre of Insect Physiology and Ecology (ICIPE), Duduville Campus Off Kasarani Road, P.O. Box 823-00621, Nairobi, Kenya.

Conservation agriculture practices involving zero tillage and residue retention are promising nutrient management strategies for soil health restoration. Despite their potential positive impact on soil fertility, improved crop yields and increased revenues for smallholder farmers; their effect on nitrogen inputs and crop growth is not clearly understood. This may limit their potential as a nutrient management strategy that may remedy soil degradation and boost crop yields for farmers. Read More

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September 2021

Proteases Production and Chitin Preparation from the Liquid Fermentation of Chitinous Fishery By-Products by .

Mar Drugs 2021 Aug 25;19(9). Epub 2021 Aug 25.

Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan.

Chitinous fishery by-products have great application in the production of various bioactive compounds. In this study, TKU051, a protease-producing bacterial strain, was isolated using a medium containing 1% squid pens powder (SPP) as the sole carbon/nitrogen (C/N) source. TKU051 was found to produce at least four proteases with molecular weights of 100 kDa, 57 kDa, 43 kDa, and 34 kDa (determined by the gelatin zymography method). Read More

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Organic inputs to reduce nitrogen export via leaching and runoff: A global meta-analysis.

Environ Pollut 2021 Sep 18;291:118176. Epub 2021 Sep 18.

Center for Resources, Environment and Food Security, China Agricultural University, Beijing, 100193, China. Electronic address:

Organic inputs as a substitution for, or addition to, chemical fertilizers can potentially mitigate N losses. However, it is not well known how their effects on N leaching and runoff depend on application approaches. We conducted a global meta-analysis of 129 studies to compare the effects of organic inputs on N export via leaching and runoff. Read More

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September 2021

Restoration of organic-matter-impoverished arable soils through the application of soil conditioner prepared via short-time hydrothermal fermentation.

Environ Res 2021 Sep 23;204(Pt B):112088. Epub 2021 Sep 23.

Xi'an High-Tech Institute, Xi'an, 710025, China.

The diversity and stability of critical microbial communities are of great importance for ensuring soil fertility. From the perspective of stimulating microbial diversity in organic-matter-impoverished arable soils, soil conditioner with a certain proportion of labile organic carbon was prepared by short-time hydrothermal fermentation (SHF). The effects of applying SHF, along with soil conditioner derived from traditional aerobic fermentation (TF) and heterogeneous fertilizer (HF), on soil texture, dissolved organic matter evolution, the structure of humic acid, and the succession of dominant microbial taxa were evaluated. Read More

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September 2021

Spatial effects and impact factors of food nitrogen footprint in China based on spatial durbin panel model.

Authors:
Chun Liu Guihua Nie

Environ Res 2021 Sep 23:112046. Epub 2021 Sep 23.

School of Economics, Wuhan University of Technology, Wuhan, 430070, Hubei, China; Hubei Provincial Research Center for E-Business Big Data Engineering Technology, Wuhan, 430070, Hubei, China.

Reactive nitrogen (Nr) has far-reaching advantages and disadvantages on human beings. Nitrogen footprint (NF) is a tool to quantify the use of Nr in the environment. Food nitrogen footprint (FNF) accounts for the largest proportion of the total NF, and the differences between provinces in China exist objectively. Read More

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September 2021

Research on application of a new bottom trap technology to catch particles rich in nutrients in a large shallow lake.

J Environ Manage 2021 Sep 22;300:113798. Epub 2021 Sep 22.

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.

The resuspension and sedimentation of particulate matter and the release of nutrients from sediment are important factors affecting the eutrophication of shallow lakes. The capture and removal of particles rich in nitrogen, phosphorus, and other nutrients at the bottom of lakes is of great significance for improving the management and eutrophication status of lakes. This study investigated the feasibility of applying lake bottom trap technology in seven different locations in Lake Chaohu, which is the fifth largest freshwater lake in China. Read More

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September 2021

Evolutionarily informed machine learning enhances the power of predictive gene-to-phenotype relationships.

Nat Commun 2021 Sep 24;12(1):5627. Epub 2021 Sep 24.

Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY, 10003, USA.

Inferring phenotypic outcomes from genomic features is both a promise and challenge for systems biology. Using gene expression data to predict phenotypic outcomes, and functionally validating the genes with predictive powers are two challenges we address in this study. We applied an evolutionarily informed machine learning approach to predict phenotypes based on transcriptome responses shared both within and across species. Read More

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September 2021

Adsorption of copper (II) and cadmium (II) ions by in situ doped nano-calcium carbonate high-intensity chitin hydrogels.

J Hazard Mater 2021 Sep 10;423(Pt B):127137. Epub 2021 Sep 10.

Guangxi University for Nationalities, Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Key Laboratory of New Technology for Chemical and Biological Transformation Process of Guangxi Higher Education Institutes, Nanning 530006, China. Electronic address:

Most natural polymers exhibit limited functional groups, which is not favourable for the adsorption of various ions and their utilisation. To overcome this drawback, a novel in-situ-doped nano-calcium carbonate (CaCO) chitin hydrogel was synthesised as an efficient adsorbent for Cu (II) and Cd (II) ions. Scanning electron microscopy and Brunauer-Emmett-Teller results revealed that the synthesised CaCO/chitin hydrogel exhibited loose macropores and mesopores. Read More

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September 2021

Simultaneously Improving the Resolving Power and Sensitivity for Planar High-Field Asymmetric Waveform Ion Mobility Spectrometry Using a Mixed Gas Inlet Mode at Two Ends.

Rapid Commun Mass Spectrom 2021 Sep 24:e9198. Epub 2021 Sep 24.

School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, China.

Rationale: Resolution and sensitivity are two key parameters for describing the performance of high-field asymmetric waveform ion mobility spectrometry (FAIMS). An increase in the resolving power of FAIMS has been realized by adding helium to nitrogen in planar FAIMS, but it comes at the expense of sensitivity.

Methods: Here, a new hollow needle-to-ring discharge device integrated on a PCB substrate is used as the ion source of FAIMS. Read More

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September 2021

A steady-state N balance approach for sustainable smallholder farming.

Proc Natl Acad Sci U S A 2021 09;118(39)

College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.

Hundreds of millions of smallholders in emerging countries substantially overuse nitrogen (N) fertilizers, driving local environmental pollution and global climate change. Despite local demonstration-scale successes, widespread mobilization of smallholders to adopt precise N management practices remains a challenge, largely due to associated high costs and complicated sampling and calculations. Here, we propose a long-term steady-state N balance (SSNB) approach without these complications that is suitable for sustainable smallholder farming. Read More

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September 2021

Glycerol or crude glycerol as substrates make Pseudomonas aeruginosa achieve anaerobic production of rhamnolipids.

Microb Cell Fact 2021 Sep 23;20(1):185. Epub 2021 Sep 23.

Research Institute of Petroleum Exploration and Development (Langfang), Langfang, 065007, Hebei, China.

Background: The anaerobic production of rhamnolipids is significant in research and application, such as foamless fermentation and in situ production of rhamnolipids in the anoxic environments. Although a few studies reported that some rare Pseudomonas aeruginosa strains can produce rhamnolipids anaerobically, the decisive factors for anaerobic production of rhamnolipids were unknown.

Results: Two possible hypotheses on the decisive factors for anaerobic production of rhamnolipids by P. Read More

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September 2021

A high sensitivity electrochemical sensor based on a dual-template molecularly imprinted polymer for simultaneous determination of clenbuterol hydrochloride and ractopamine.

Analyst 2021 Sep 23. Epub 2021 Sep 23.

Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, China.

A nitrogen-doped Fe-MOF shows a high specific surface area and excellent electrical conductivity after high temperature carbonization. A novel electrochemical sensor based on a [email protected]@C loaded dual-template molecularly imprinted polymer (DTMIP) modified glassy carbon electrode (GCE) was proposed for the rapid and ultra-sensitive simultaneous detection of clenbuterol hydrochloride (CLB) and ractopamine (RAC). [email protected]@C combined with a MIP significantly enhanced the electrical signal. Read More

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September 2021

Interaction of amino acids with nanoplastic traces and their effect on .

J Environ Sci Health A Tox Hazard Subst Environ Eng 2021 Sep 22:1-11. Epub 2021 Sep 22.

Health Services Vocational School of Higher Education, T. C. Istanbul Aydin University, Sefakoy Kucukcekmece, 34295, Istanbul, Turkey.

In this study, we reported the interaction between plastic traces and vital amino acids (L-homocysteine, L-valine, and L-lysine) in an aqueous system and characterized this interaction by Fourier transform infrared spectroscopy and Scanning electron microscopy with energy-dispersive X-ray spectroscopy studies. Bacterial activity and biofilm formation and their characteristics of non-treated and amino acid-treated plastic traces was tested against the bacterial pathogen. The surface results showed that the carbonyl groups and oxygen to carbon ratios were increased, and the attachment of nitrogen- and sulfur-related substances on the plastic surface occurred by the homocysteine over time. Read More

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September 2021

Synergistic anti-oxidative and antimicrobial effects of oat phenolic compounds and ascorbate palmitoyl on fish balls during cold storage.

J Food Sci 2021 Sep 21. Epub 2021 Sep 21.

College of Food and Pharmaceutical Sciences, Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, Zhejiang Province, P. R. China.

This study investigated the effect of antioxidants on lipid stability of mackerel (Scomber japonicus) fish balls. Oat phenolic acid compounds (OPC) and ascorbate palmitoyl (AP) were used to prolong the shelf life of steamed mackerel fish balls. Fish balls were stored at 4°C for 21 days, and the total bacterial count, hardness, whiteness, water holding capacity (WHC), pH, total volatile basic nitrogen (TVB-N), and thiobarbituric acid reactive substances (TBARS) value were monitored regularly. Read More

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September 2021

Establishment and application of population pharmacokinetics model of vancomycin in infants with meningitis.

Pediatr Neonatol 2021 Sep 2. Epub 2021 Sep 2.

Department of Pharmacy, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, 350001, China. Electronic address:

Background: To establish a population pharmacokinetics (PPK) model of vancomycin (VCM) for dose individualization in Chinese infants with meningitis.

Methods: We collected the data of 82 children with meningitis in hospital from July 2014 to June 2016. The initial vancomycin dosage regimen for children was 10 or 15 mg/kg for q12 h, q8 h or q6 h. Read More

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September 2021

Multifunctional Biomedical Applications of Nitrogen and Sulfur Co-Doped Carbon Dots.

J Biomed Nanotechnol 2021 Aug;17(8):1598-1611

School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, P. R. China; National Demonstration Center for Experimental Ethnopharmacology Education (South-Central University for Nationalities), Wuhan 430065, China.

Multifunctional carbon dots have drawn considerable attention due to their potential biomedical application value. We report the preparation of blue-green fluorescence-emitting, multifunctional, nitrogen-and-sulfur co-doped carbon dots (N, S-CDs) synthesized via a one-step process using 1-thioglycerol as a sulfur source, glucose and citric acid as carbon sources, and polyethyleneimine as a nitrogen source. Because of abundant amino and sulfur content, the CDs exhibited high sensibility and selectivity for detecting Cu (detection limit: 0. Read More

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Accumulation of phthalates under high versus low nitrogen addition in a soil-plant system with sludge organic fertilizers instead of chemical fertilizers.

Environ Pollut 2021 Sep 16;291:118193. Epub 2021 Sep 16.

State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.

Nitrogen is the main nutrient in soil. The long-term addition of N leads to changes in the soil dissolved organic matter (DOM) and other quality indicators, which affects the adsorption and accumulation of organic pollutants. The use of organic fertilizer is important for the development of green agriculture. Read More

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September 2021

Cultivable microalgae diversity from a freshwater aquaculture filtering system and its potential for polishing aquaculture derived water streams.

J Appl Microbiol 2021 Sep 20. Epub 2021 Sep 20.

Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal.

Aims: Microalgae are ubiquitous in aquatic environments, including aquaculture farms, but few studies have delved into their phytoplankton diversity and bioremediation potential. In this study, the cultivable phytoplankton of a rainbow trout freshwater aquaculture farm was isolated, phylogenetically analysed and used to assemble a consortium to polish an aquaculture derived effluent, with low concentrations of ammonium, nitrite, and nitrate.

Methods And Results: Through standard plating in different selective media, a total of 15 microalgae strains were isolated from sludge from a rotary drum filtering system which removes suspended solids from the water exiting the facility. Read More

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September 2021

Density functional theory study of active sites on nitrogen-doped graphene for oxygen reduction reaction.

R Soc Open Sci 2021 Sep 1;8(9):210272. Epub 2021 Sep 1.

College of Architecture and Environment, Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, People's Republic of China.

Oxygen reduction reaction (ORR) remains challenging due to its complexity and slow kinetics. In particular, Pt-based catalysts which possess outstanding ORR activity are limited in application with high cost and ease of poisoning. In recent years, nitrogen-doped graphene has been widely studied as a potential ORR catalyst for replacing Pt. Read More

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September 2021