Soil Nitrogen Cycling—a Keystone in Ecological Sustainability, 2nd Edition

A special issue of Nitrogen (ISSN 2504-3129).

Deadline for manuscript submissions: 30 September 2026 | Viewed by 1051

Editors


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Guest Editor
College of Forestry, Guangxi University, Nanning 530004, China
Interests: soil nitrogen cycling; soil microbial ecology; greenhouse gas emissions; agricultural sustainability
Special Issues, Collections and Topics in MDPI journals
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Interests: carbon cycles; nutrient use efficiency; climate change
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The first edition of the Special Issue Soil Nitrogen Cycling—a Keystone in Ecological Sustainability was closed in 2025: https://www.mdpi.com/journal/nitrogen/special_issues/J3E1J1R9JK.

It was a successful collection, with four excellent papers, and this success has encouraged us to launch a second edition on the same topic. As a continuation of the first Special Issue, this second edition will gather insights and findings from diverse perspectives, offering a platform for sharing innovative research in the Soil Nitrogen Cycling field.

We are looking for submissions covering a range of topics, including, but not limited to, the following:

  • Biogeochemical processes of soil nitrogen cycling;
  • The role of nitrogen cycling in agricultural ecosystems;
  • Impacts of nitrogen management strategies on ecosystems and crop yields;
  • Interactions between nitrogen cycling and global changes such as climate change and land use change;
  • Innovative methodologies and technologies in the study of nitrogen cycling.

We await your contributions, which will enrich our understanding of the significance of soil nitrogen cycling in ecological sustainability 

Dr. Cong Wang
Dr. Ji Liu
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nitrogen is an international peer-reviewed open access quarterly 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 1200 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

  • biogeochemical processes
  • ecosystems
  • crop yields
  • global changes
  • agricultural sustainability

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Published Papers (1 paper)

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Research

14 pages, 269 KB  
Article
Enhancing Soil Fertility, Improving Yield of Dai Thom 8 Rice, and Reducing Nitrogen Fertilizer Input Through Herbaspirillum seropedicae Inoculation
by Trinh Van Tuan Em and Nguyen Van Chuong
Nitrogen 2026, 7(2), 48; https://doi.org/10.3390/nitrogen7020048 - 30 Apr 2026
Viewed by 647
Abstract
The excessive use of inorganic nitrogen (N) fertilizers in rice production poses significant environmental and economic challenges, particularly in intensive farming systems such as those in the Mekong Delta, Vietnam. This study aimed to evaluate the potential of Herbaspirillum seropedicae (H. seropedicae), [...] Read more.
The excessive use of inorganic nitrogen (N) fertilizers in rice production poses significant environmental and economic challenges, particularly in intensive farming systems such as those in the Mekong Delta, Vietnam. This study aimed to evaluate the potential of Herbaspirillum seropedicae (H. seropedicae), an endophytic N-fixing bacterium, to enhance soil fertility, improve rice growth, and maintain yield while reducing N fertilizer inputs in Dai Thom 8 rice under field conditions. A randomized complete block design with five treatments, including different nitrogen reduction levels combined with bacterial inoculation, was employed. The results showed that treatments integrating H. seropedicae significantly improved soil properties, including soil organic matter, total nitrogen, and available nutrients, compared to the control. Growth parameters such as plant height, tiller density, and chlorophyll content were also enhanced, particularly in treatments with bacterial inoculation. Yield components, including grain number and filled grains per panicle, were significantly increased, leading to higher grain yield. The highest yield was observed in T5 (5.72 t ha−1), while T3 and T4 achieved comparable yields with reduced N inputs. Additionally, grain quality analysis revealed increased protein content without negatively affecting starch composition. These findings highlight the potential of H. seropedicae as a biofertilizer to improve N use efficiency and reduce dependency on chemical fertilizers. The study provides strong evidence for integrating microbial inoculants into sustainable rice production systems. Among the treatments, T3 (50% N reduction combined with bacterial inoculation) is recommended as the optimal strategy due to its balance between high yield and reduced input costs, contributing to environmentally friendly and economically viable agriculture. Full article
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