Nitrogen Uptake and Loss in Agroecosystems

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

Deadline for manuscript submissions: 31 January 2026 | Viewed by 1391

Special Issue Editors


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Guest Editor
Texas A&M AgriLife Research Center, Vernon, TX 76384, USA
Interests: nitrogen cycling; management practice; nitrogen assimilation; denitrification; mitigation measures; nitric oxide; greenhouse gas emissions

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Guest Editor
CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
Interests: N2O modeling; nitrogen fertilizer; mitigation measures; process-based models; soil emissions

Special Issue Information

Dear Colleagues,

Nitrogen is a critical nutrient for agricultural productivity; it plays a central role in crop growth and ecosystem health. However, its management presents a dual challenge: optimizing nitrogen uptake by crops and increasing the yield while minimizing nitrogen losses to the environment. Inefficient nitrogen use leads to losses through pathways such as leaching, volatilization, and denitrification, contributing to greenhouse gas emissions, water contamination, and soil degradation.

This Special Issue aims to focus on advancing our understanding of nitrogen dynamics in agricultural ecosystems, emphasizing the mechanisms of nitrogen uptake and loss. We also aim to explore innovative management practices, technologies, and mitigation strategies aimed at improving nitrogen use efficiency and reducing environmental impacts.

Researchers are invited to contribute original studies and reviews on topics including nitrogen cycling, assimilation, and loss, as well as practical solutions for sustainable nutrient management. By addressing these issues, this Special Issue seeks to promote sustainable and resilient agricultural systems globally.

Dr. Arbindra Timilsina
Dr. Bikram Pandey
Guest Editors

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Keywords

  • nitrogen cycling
  • management practice
  • nitrogen assimilation
  • denitrification
  • mitigation measures

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Published Papers (1 paper)

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Research

14 pages, 1699 KB  
Article
Impact of Organic and Inorganic Sources of Nitrogen on Soil Fertility, Nitrogen Use Efficiency, and Carbon Accumulation Potential Under Subtropical Rice-Based Cropping Patterns in Farmers’ Fields
by Sabina Yeasmin, Mojakkar Noman, Zaren Subah Betto, Tamanna Rahman, Sanjida Parven Sarly, A. K. M. Mominul Islam and Md. Parvez Anwar
Nitrogen 2025, 6(3), 86; https://doi.org/10.3390/nitrogen6030086 - 19 Sep 2025
Viewed by 951
Abstract
This study aimed to assess the effect of organic amendment-based integrated nitrogen (N) application on major soil macronutrients, carbon (C) accumulation, crop productivity and N use efficiency (NUE) of different rice-based cropping patterns. This experiment was composed of various organic amendments ((i): control [...] Read more.
This study aimed to assess the effect of organic amendment-based integrated nitrogen (N) application on major soil macronutrients, carbon (C) accumulation, crop productivity and N use efficiency (NUE) of different rice-based cropping patterns. This experiment was composed of various organic amendments ((i): control (no organic amendment, application of 100% N from urea); (ii): 25% N from compost + 75% N from urea; (iii): 25% N from cowdung + 75% N from urea; iv: 25% N from vermicompost + 75% N from urea) and rice-based cropping patterns ((i) rice–rice–rice, (ii) rice–fallow–rice–mustard, and (iii) rice–vegetables–rice). Organic amendments and soils (0–20 cm) were collected from farmers’ fields and were analyzed for major nutrients: N and organic C (OC), phosphorus (P), potassium (K) and sulphur (S). Soil OC accumulation potential, system productivity and partial factor productivity of N were also calculated. The results indicate that organic amendment application significantly enhanced soil OC (0.957–1.604%) compared to control (0.916–1.292%), with vermicompost attaining the highest OC content and OC accumulation potential (up to 24.15%), especially in the rice–vegetables–rice pattern. Vermicompost also predominantly increased N (22–62%) and S (51–78%) level in soils, while cowdung significantly amended P levels (155–178%) and contributed steadily to improved K levels in soil. Overall, nutrient improvements and soil fertility were highest under the rice–vegetables–rice system, followed by rice–fallow–mustard–rice and rice–rice–rice. System productivity was maximum in the rice–vegetables–rice pattern (up to 85.7 t ha−1), with remarkable enhancements in NUE when organic amendments were applied. Cowdung and vermicompost both matched or exceeded the performance of chemical fertilizer in these cases. These results demonstrate the advantages of integrated N management and diversified cropping to improve nutrient cycling, soil health and sustainable productivity in rice-based agroecosystems. Full article
(This article belongs to the Special Issue Nitrogen Uptake and Loss in Agroecosystems)
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