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1. Impacts of pollution heterogeneity on population exposure in dense urban areas using ultra-fine resolution air quality data

Author:
Wenwei Che; Yumiao Zhang; Changqing Lin; Yik Him Fung; Jimmy C.H. Fung; Alexis K.H. Lau
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 513-523
ISSN:
1001-0742
Subject:
nitrogen dioxide,   etc   ; air pollution; air quality; meteorology; particulates; traffic; urban areas; urbanization; China;     Show all 9 Subjects
Abstract:
... Traditional air quality data have a spatial resolution of 1 km or above, making it challenging to resolve detailed air pollution exposure in complex urban areas. Combining urban morphology, dynamic traffic emission, regional and local meteorology, physicochemical transformations in air quality models using big data fusion technology, an ultra-fine resolution modeling system was developed to provid ...
DOI:
10.1016/j.jes.2022.02.041

2. Nitrogen-doped porous carbons from polyacrylonitrile fiber as effective CO2 adsorbents

Author:
Changdan Ma; Jiali Bai; Xin Hu; Zhuohan Jiang; Linlin Wang
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 533-543
ISSN:
1001-0742
Subject:
nitrogen content,   etc   ; adsorbents; adsorption; carbon; carbon dioxide; carbonization; heat; polyacrylonitrile; porosity; temperature; China;     Show all 11 Subjects
Abstract:
... In this report, nitrogen-doped porous carbons were synthesized from polyacrylonitrile fiber by a facile two-step synthesis process i.e. carbonization followed by KOH activation. Activation temperature and KOH/carbon ratio are two parameters to tune the porosity and surface chemical properties of sorbents. The as-obtained sorbents were carefully characterized. Special attention was paid concerning ...
DOI:
10.1016/j.jes.2022.03.016

3. Water mimosa (Neptunia oleracea Lour.) can fix and transfer nitrogen to rice in their intercropping system

Author:
Zewen Hei; Huimin Xiang; Jiaen Zhang; Kaiming Liang; Xiaoqiao Ren; Yanran Sun; Ruiqin Wu
Source:
Journal of the science of food and agriculture 2022 v.102 no.1 pp. 156-166
ISSN:
0022-5142
Subject:
ammonium nitrogen; nitrate nitrogen; nitrogen,   etc   ; Neptunia oleracea; agriculture; nitrogen fertilizers; nitrogen fixation; rice; soil; sustainable agriculture; urease;     Show all 11 Subjects
Abstract:
... BACKGROUND: Cereal–legume intercropping systems are an environmentally friendly practice in sustainable agriculture. However, research on the interspecific interaction of nitrogen (N) between rice and aquatic legumes has rarely been undertaken. To address this issue, a pot experiment was conducted to investigate N utilization and the N interaction between rice and water mimosa (Neptunia oleracea L ...
DOI:
10.1002/jsfa.11342

4. Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems

Author:
Jagdish K. Ladha; Mark B. Peoples; Pallavolu M. Reddy; Jatish C. Biswas; Alan Bennett; Mangi L. Jat; Timothy J. Krupnik
Source:
Field crops research 2022 v.283 pp. 108541
ISSN:
0378-4290
Subject:
nitrogen; nitrogen cycle; nitrogen fertilizers,   etc   ; agroecosystems; alternative crops; corn; crop production; diet; legumes; nitrogen fixation; nitrogen-fixing bacteria; research; rice; soil; soil organic nitrogen; symbiosis; wheat;     Show all 17 Subjects
Abstract:
... The demand for nitrogen (N) for crop production increased rapidly from the middle of the twentieth century and is predicted to at least double by 2050 to satisfy the on-going improvements in productivity of major food crops such as wheat, rice and maize that underpin the staple diet of most of the world’s population. The increased demand will need to be fulfilled by the two main sources of N suppl ...
DOI:
10.1016/j.fcr.2022.108541

5. Two co‐dominant nitrogen‐fixing cyanobacteria demonstrate distinct acclimation and adaptation responses to cope with ocean warming

Author:
Ping‐Ping Qu; Fei‐Xue Fu; Xin‐Wei Wang; Joshua D. Kling; Mariam Elghazzawy; Megan Huh; Qian‐Qian Zhou; Chunguang Wang; Esther Wing Kwan Mak; Michael D. Lee; Nina Yang; David A. Hutchins
Source:
Environmental microbiology reports 2022 v.14 no.2 pp. 203-217
ISSN:
1758-2229
Subject:
nitrogen; nitrogen cycle; nitrogen fixation,   etc   ; Trichodesmium; acclimation; directed evolution; evolution; nitrogen-fixing bacteria; nitrogen-fixing cyanobacteria; phenotype; phenotypic plasticity; sympatry; temperature;     Show all 13 Subjects
Abstract:
... The globally dominant N₂‐fixing cyanobacteria Trichodesmium and Crocosphaera provide vital nitrogen supplies to subtropical and tropical oceans, but little is known about how they will be affected by long‐term ocean warming. We tested their thermal responses using experimental evolution methods during 2 years of selection at optimal (28°C), supra‐optimal (32°C) and suboptimal (22°C) temperatures. ...
DOI:
10.1111/1758-2229.13041

6. Estuarine microbial diversity and nitrogen cycling increase along sand–mud gradients independent of salinity and distance

Author:
Jian Sheng Boey; Redmond Mortimer; Agathe Couturier; Katie Worrallo; Kim M. Handley
Source:
Environmental microbiology 2022 v.24 no.1 pp. 50-65
ISSN:
1462-2912
Subject:
nitrogen; nitrogen cycle; nitrogen retention,   etc   ; ammonia; estuaries; fauna; genes; habitats; microbiology; salinity;     Show all 10 Subjects
Abstract:
... Estuaries are depositional environments prone to terrigenous mud sedimentation. While macrofaunal diversity and nitrogen retention are greatly affected by changes in sedimentary mud content, its impact on prokaryotic diversity and nitrogen cycling activity remains understudied. We characterized the composition of estuarine tidal flat prokaryotic communities spanning a habitat range from sandy to m ...
DOI:
10.1111/1462-2920.15550

7. Effect of thermophilic microbial agents on nitrogen transformation, nitrogen functional genes, and bacterial communities during bean dregs composting

Author:
Xiaojia Chen; Guilin Du; Chengjian Wu; Qinyu Li; Peng Zhou; Jiping Shi; Zhijun Zhao
Source:
Environmental science and pollution research 2022 v.29 no.21 pp. 31846-31860
ISSN:
0944-1344
Subject:
ammonium nitrogen; nitrate nitrogen; nitrogen,   etc   ; Weissella; beans; denitrification; genes; mineralization; nitrates; nitrification; nitrites; nitrogen fixation; nitrous oxide; pH; pollution; research; seed germination; temperature; total nitrogen; water solubility;     Show all 20 Subjects
Abstract:
... This study explored how a thermophilic microbial agent altered nitrogen transformation, nitrogen functional genes, and bacterial communities during bean dregs composting with (T) and without (CK) a thermophilic microbial agent for 15 days. The results showed that the maximum temperature in T reached 73 °C and remained above 70 °C for 8 days, while that in CK was only 65 °C. The pH in T had essenti ...
DOI:
10.1007/s11356-021-17946-w

8. Cover crops and controlled-release urea decrease need for mineral nitrogen fertilizer for cotton in sandy soil

Author:
Carlos Felipe dos Santos Cordeiro; Daniel Rodela Rodrigues; Fábio Rafael Echer
Source:
Field crops research 2022 v.276 pp. 108387
ISSN:
0378-4290
Subject:
nitrogen; nitrogen content; nitrogen fertilizers,   etc   ; cotton; fallow; grasses; legumes; micronaire; research; sandy soils; urea;     Show all 11 Subjects
Abstract:
... Cover crops can affect nitrogen fertilization efficiency, soil nitrogen content, and cotton yield. However, the interaction effects of controlled-release nitrogen fertilizers, applied N rate, and cover crops on cotton growth, yield and fiber quality remains unknown, especially in sandy soils with low N content. Soil nitrogen and cotton growth, yield and fiber quality were evaluated as a function o ...
DOI:
10.1016/j.fcr.2021.108387

9. Compound-specific amino acid 15N-stable isotope probing for the quantification of biological nitrogen fixation in soils

Author:
Mashita Chiewattanakul; Adam D.A. McAleer; Michaela K. Reay; Robert I. Griffiths; Heather L. Buss; Richard P. Evershed
Source:
Soil biology & biochemistry 2022 v.169 pp. 108654
ISSN:
0038-0717
Subject:
nitrogen; nitrogen fixation; nitrogen-fixing bacteria,   etc   ; ecosystems; energy; glucose; glutamic acid; mass spectrometry; microbial communities; peat; plant nitrogen content; primary productivity;     Show all 12 Subjects
Abstract:
... Biological nitrogen fixation (BNF) performed by diazotrophs is vital to our understanding of ecosystem functions, as plant nitrogen (N) is commonly a limiting nutrient for primary productivity. However, significant limitations have remained in our knowledge of the controls and rates of this process, due to technical difficulties in directly quantifying nitrogen (N₂) fixation rates. To address this ...
DOI:
10.1016/j.soilbio.2022.108654

10. Contribution of cauliflower residues to N nutrition of subsequent lettuce crops grown in rotation in an Italian Alpine environment

Author:
Marco Tempesta; Giuseppina Pennisi; Giorgio Gianquinto; Markus Hauser; Massimo Tagliavini
Source:
Agronomy for sustainable development 2022 v.42 no.2 pp. 25
ISSN:
1774-0746
Subject:
nitrogen; nitrogen fertilizers; total nitrogen,   etc   ; agronomy; cauliflower; lettuce; nutrition; residual effects; soil; sustainable development; Italy;     Show all 11 Subjects
Abstract:
... Up to 75% of nitrogen (N) taken up during cauliflowers production is allocated to leaves, which are left as crop residues after harvest. The inclusion of cauliflower, cultivated alone or intercropped with legumes, in rotation schemes, is a promising tool to optimize N availability to subsequent crops. This original study assessed, for the first time in South Tyrol, Italy, the effect of removal or ...
DOI:
10.1007/s13593-022-00756-w

11. Micromanaging the nitrogen cycle in agroecosystems

Author:
Isaac M. Klimasmith; Angela D. Kent
Source:
Trends in microbiology 2022 pp. -
ISSN:
0966-842X
Subject:
nitrogen; nitrogen cycle; nitrogen fixation,   etc   ; agroecosystems; climate change; crop production; nitrates; nitrous oxide; nutrient management;     Show all 9 Subjects
Abstract:
... While large inputs of synthetic nitrogen fertilizers enable our current rate of crop production and feed a growing global population, these fertilizers come at a heavy environmental cost. Driven by microbial processes, excess applied nitrogen is lost from agroecosystems as nitrate and nitrous oxide (N₂O) contaminate aquatic ecosystems and contribute to climate change. Interest in nitrogen-fixing m ...
DOI:
10.1016/j.tim.2022.04.006

12. The response of photosystem I to fluctuating light is influenced by leaf nitrogen content in tomato

Author:
Hu Sun; Qi Shi; Shi-Bao Zhang; Wei Huang
Source:
Environmental and experimental botany 2022 v.193 pp. 104665
ISSN:
0098-8472
Subject:
leaf nitrogen content; nitrogen; nitrogen content,   etc   ; carbon dioxide; chlorophyll; leaves; lighting; photoinhibition; photosystem II; tomatoes;     Show all 10 Subjects
Abstract:
... Fluctuating light and nitrogen (N) deficiency can occur synchronously under natural growth conditions. However, little is known about the photosynthetic regulation under fluctuating light in plants grown with N deficiency. In the present study, we examined the effect of N supply on the response of photosystem I (PSI) to fluctuating light in tomato. Plants grown under high N concentration (HN-plant ...
DOI:
10.1016/j.envexpbot.2021.104665

13. A novel approach for determining nitrogen requirement based on a new agronomic principle—sugarcane as a crop model

Author:
Guilherme M. Sanches; Rafael Otto
Source:
Plant and soil 2022 v.472 no.1-2 pp. 29-43
ISSN:
0032-079X
Subject:
nitrogen; nitrogen fixation,   etc   ; Saccharum; crop models; sugarcane; Brazil;     Show all 6 Subjects
Abstract:
... There are growing evidence that nitrogen (N) recommendation based on the expected yield concept developed by Stanford in 1973 lacks in agronomic principles, despite it widespread use worldwide. In Brazil, the main sugarcane producer worldwide, for example, a fixed N factor of 1 kg N per Mg⁻¹ of stalk is used. However, literature demonstrates that sugarcane responsiveness to N is much higher in san ...
DOI:
10.1007/s11104-021-05263-7

14. Combined biochar and double inhibitor application offsets NH3 and N2O emissions and mitigates N leaching in paddy fields

Author:
Tiehu He; Junji Yuan; Jian Xiang; Yongxin Lin; Jiafa Luo; Stuart Lindsey; Xia Liao; Deyan Liu; Weixin Ding
Source:
Environmental pollution 2022 v.292 pp. 118344
ISSN:
0269-7491
Subject:
nitrogen; nitrogen fertilizers; total nitrogen,   etc   ; ammonia; biochar; dicyandiamide; hydroquinone; nitrification inhibitors; nitrous oxide; nutrient use efficiency; pH; paddies; pollution; rice; urea nitrogen; urease;     Show all 16 Subjects
Abstract:
... The effects of combined biochar and double inhibitor application on gaseous nitrogen (N; nitrous oxide [N₂O] and ammonia [NH₃]) emissions and N leaching in paddy soils remain unclear. We investigated the effects of biochar application at different rates and double inhibitor application (hydroquinone [HQ] and dicyandiamide [DCD]) on NH₃ and N₂O emissions, N leaching, as well as rice yield in a padd ...
DOI:
10.1016/j.envpol.2021.118344

15. Estimating plant nitrogen content in tomato using a smartphone

Author:
Livia Paleari; Ermes Movedi; Fosco M. Vesely; Mattia Invernizzi; Daniele Piva; Giacomo Zibordi; Roberto Confalonieri
Source:
Field crops research 2022 v.284 pp. 108564
ISSN:
0378-4290
Subject:
nitrogen; nitrogen content; plant nitrogen content,   etc   ; environmental impact; mobile telephones; precision agriculture; research; satellites; tomatoes; Italy;     Show all 10 Subjects
Abstract:
... Optimizing nitrogen (N) fertilization is increasingly becoming a key issue to maximize productivity and farmers’ income while reducing environmental impact of agricultural productions. Among the most sophisticated approaches to support variable rate N applications, a central role is played by frameworks that integrate satellite images and smart-scouting driven ground estimates of plant N content ( ...
DOI:
10.1016/j.fcr.2022.108564

16. Estimation of nitrogen in cotton leaves using different hyperspectral region data

Author:
Qiang ZHANG; Lulu MA; Xiangyu CHEN; Jiao LIN; Caixia YIN; Qiushuang YAO; Xin LV; Ze ZHANG
Source:
Notulae botanicae Horti Agrobotanici Cluj-Napoca 2022 v.50 no.1 pp. -
ISSN:
1842-4309
Subject:
leaf nitrogen content; nitrogen; nitrogen content,   etc   ; cotton; flowers; model validation; models; nutrition; reflectance; spectral analysis; China;     Show all 11 Subjects
Abstract:
... As an important index of a plant’s N nutrition, leaf nitrogen content (LNC) can be quickly monitored in real time with hyperspectral information, which is helpful to guide the precise application of N in cotton leaves. In this study, taking cotton dripping in Xinjiang, China, as the object of study, five N application treatments (0, 120, 240, 360, 480 kg·ha-1) were set up, and the hyperspectral da ...
DOI:
10.15835/nbha50112595

17. From use efficiency to effective use of nitrogen: A dilemma for maize breeding improvement

Author:
Ignacio A. Ciampitti; Gilles Lemaire
Source:
Science of the total environment 2022 v.826 pp. 154125
ISSN:
0048-9697
Subject:
nitrogen; nitrogen content; nitrogen fertilizers,   etc   ; Zea mays; corn; environment; food security; nutrient use efficiency; nutrition; phytomass;     Show all 10 Subjects
Abstract:
... Maize (Zea mays L.) breeding is continuously moving forward yield gains for many fields crops, increasing dependency to technology such as high input seed costs and high use of nitrogen (N) fertilizers. For this crop, breeding improvement led to concomitantly enhancing N recovery and uptake but following a similar ratio relative to the plant biomass (W) and nitrogen nutrition index (NNI, as actual ...
DOI:
10.1016/j.scitotenv.2022.154125

18. Transforming heterotrophic to autotrophic denitrification process: Insights into microbial community, interspecific interaction and nitrogen metabolism

Author:
Xiao Huang; Chongsen Duan; Jianghua Yu; Wenyi Dong
Source:
Bioresource technology 2022 v.345 pp. 126471
ISSN:
0960-8524
Subject:
nitrate nitrogen; nitrite nitrogen; nitrogen metabolism,   etc   ; Hydrogenophilaceae; Methylophilaceae; carbon; denitrification; microbial communities; oxidation; sulfides; sulfur; technology;     Show all 12 Subjects
Abstract:
... For investigating the microbial community, interspecific interaction and nitrogen metabolism during the transform process from heterotrophic to synergistic and autotrophic denitrification, a filter was built, and carbon source and sulfur concentration were changed to release the transformation process. The results demonstrated that the transformation process was feasible to keep nitrate nitrogen ( ...
DOI:
10.1016/j.biortech.2021.126471

19. Unexpected high retention of 15N‐labeled nitrogen in a tropical legume forest under long‐term nitrogen enrichment

Author:
Jinhua Mao; Qinggong Mao; Per Gundersen; Geshere A. Gurmesa; Wei Zhang; Juan Huang; Senhao Wang; Andi Li; Yufang Wang; Yabing Guo; Rongzhen Liu; Jiangming Mo; Mianhai Zheng
Source:
Global change biology 2022 v.28 no.4 pp. 1529-1543
ISSN:
1354-1013
Subject:
nitrogen; nitrogen cycle; nitrogen fixation,   etc   ; carbon sequestration; ecosystems; forest litter; global change; legumes; mineral soils; prediction;     Show all 10 Subjects
Abstract:
... The responses of forests to nitrogen (N) deposition largely depend on the fates of deposited N within the ecosystem. Nitrogen‐fixing legume trees widely occur in terrestrial forests, but the fates of deposited N in legume‐dominated forests remain unclear, which limit a global evaluation of N deposition impacts and feedbacks on carbon sequestration. Here, we performed the first ecosystem‐scale ¹⁵N ...
DOI:
10.1111/gcb.16005

20. Biochar and potassium humate shift the migration, transformation and redistribution of urea-N in salt-affected soil under drip fertigation: soil column and incubation experiments

Author:
Rongjiang Yao; Hongqiang Li; Wei Zhu; Jingsong Yang; Xiangping Wang; Chunyan Yin; Yupeng Jing; Qiang Chen; Wenping Xie
Source:
Irrigation science 2022 v.40 no.2 pp. 267-282
ISSN:
0342-7188
Subject:
ammonium nitrogen; nitrate nitrogen; nitrogen,   etc   ; agroecosystems; biochar; fertigation; hydrolysis; irrigation; macropores; nitrification; nitrogen fertilizers; potassium; soil quality; soil salinity; soil salinization; soil salts; soil water; soil water retention; urea; urea nitrogen;     Show all 20 Subjects
Abstract:
... Improper fertilization or excessive nitrogen input may cause serious environmental problems and affect soil health. This is particularly the case in saline agroecosystems, as soil salinization alters nitrogen cycling and contributes to substantial nitrogen losses. However, the impact of amendment materials on the combined processes of nitrogen transformation and migration in salt-affected soil has ...
DOI:
10.1007/s00271-021-00763-x