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Agronomy
Special Issues
Integrated Nitrogen Management for Improved Use Efficiency in Agroecosystems
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Integrated Nitrogen Management for Improved Use Efficiency in Agroecosystems

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1037

Special Issue Editors

Dr. Peter Omara

E-Mail Website1 Website2
Guest Editor
College of Agriculture & Life Sciences, Texas A&M University, Weslaco, TX, USA
Interests: soil science; soil fertility; nitrogen management; cropping systems
Dr. Bee Khim Chim

E-Mail Website1 Website2
Guest Editor
School of Food and Agriculture—Cooperative Extension, University of Maine, Presque Isle, ME, USA
Interests: nutrient management; nitrogen; cover crop; soil health

Special Issue Information

Dear Colleagues,

Nitrogen fertilizer management remains a challenge due to spatial and temporal variability, which presents numerous loss pathways. Agroecosystems with high fertilizer nitrogen requirements necessitate the use of innovative and sustainable management strategies to mitigate contamination from reactive nitrogen in both above-ground and below-ground environments. Despite numerous advanced research investigations on this subject, the issue of nitrogen loss and low utilization efficiency remains apparent in many agroecosystems. Using management approaches independently seems to have minimal benefits in improving low use efficiency compared to an integrated strategy. The goal of this Special Issue is to collect innovative and integrated research on the management of nitrogen fertilizers in different agroecosystems. We encourage research conducted in field plots, on-farm experiments, and greenhouses and review papers that addresses, soil qualities, integrated soil management, cropping systems, fertilizer technologies, soil amendments, and climate change, among other topics. Research topics that combine more than one strategy are preferred. We strongly encourage the submission of review papers and original research covering a wide range of geographical scales, including regional, national, and global levels.

Dr. Peter Omara
Dr. Bee Khim Chim
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nitrogen fertilizers
  • agroecosystems
  • nitrogen use efficiency
  • enhanced fertilizers
  • precision nitrogen management
  • cropping systems
  • integrated nutrient management

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Published Papers (1 paper)

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Research

24 pages, 4282 KiB  
Article
Mechanisms of N2O Emission in Drip-Irrigated Saline Soils: Unraveling the Role of Soil Moisture Variation in Nitrification and Denitrification
by Fang Zhang, Zhi Qu, Qian Zhao, Zixuan Xi and Zhen Liu
Agronomy 2025, 15(1), 10; https://doi.org/10.3390/agronomy15010010 - 25 Dec 2024
Viewed by 594
Abstract
Drip irrigation generates structural bodies in soil, forming layered structures with moisture content gradients. There are four typical soil moisture characteristic values in this concentric structure as saturation capacity (θs), field capacity (FC), 60% field capacity (60% FC), and 30% field capacity (30% [...] Read more.
Drip irrigation generates structural bodies in soil, forming layered structures with moisture content gradients. There are four typical soil moisture characteristic values in this concentric structure as saturation capacity (θs), field capacity (FC), 60% field capacity (60% FC), and 30% field capacity (30% FC). In this study, we simulated these four soil water characteristic values to conduct an indoor soil incubation experiment under three different incubation conditions: aerobic (O), aerobic with 10 pa acetylene (OC), and anaerobic (AO). The results indicate that in soil with saturated water content, denitrification under aerobic conditions leads to high N2O emissions; in soil at field holding capacity, nitrification under aerobic conditions dominates low N2O emissions, which is most conducive to N2O reduction and greenhouse gas emission mitigation; in soil with 60% of field holding capacity, denitrification under anaerobic conditions leads to high N2O emissions; and in soil with 30% of field holding capacity, microbial activity decreases, inhibiting nitrification, denitrification, and N2O emissions. Our research has found that when conducting aerobic drip irrigation in soil at field capacity (FC), denitrification was reduced by 99%, nitrification was increased by 70%, and microbial activity was enhanced by 5%. Therefore, during drip irrigation, the position and flow rate of the dripper should be controlled to reduce soil water saturation areas, maintain soil aeration, control soil moisture content below field holding capacity, promote the nitrification process, reduce N2O emissions, and improve soil nitrogen use efficiency. Our study elucidates the characteristics of nitrogen transformation and N2O emissions across various soil moisture contents within the soil water structure under drip irrigation conditions, providing a scientific basis for the formulation of precise irrigation management practices and strategies for efficient soil nitrogen utilization. Full article
(This article belongs to the Special Issue Integrated Nitrogen Management for Improved Use Efficiency in Agroecosystems)
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