A Circular Economy: Chemical, Microbiological and Environmental Implications of Mineral and Organic Fertilizers Use in Soils—2nd Edition

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

Deadline for manuscript submissions: 31 March 2026 | Viewed by 507

Special Issue Editor

Special Issue Information

Dear Colleagues,

The continuous pressure on natural resources and the related environmental pollution are sources of concern around the world, and the intensive development of industry is causing direct or indirect impacts on the environment and human health and wellbeing as a result of the production of large quantities of waste and the emission of toxic chemicals. The circular economy is increasingly gaining in importance as it introduces the development of new, environmentally friendly technologies, minimizes the generation of waste and pollution, and reduces the negative impact of human activities on the environment. Particular attention, in the context of environmental impact, should be given both to important nutrients for plants and impurities that may be introduced into the soil along with fertilizers. The need to protect the environment is forcing us to take a new look at the problems of fertilization and the use of components of applied fertilizers. In recent years, the quality and health of soil fertilized with organic fertilizers (including waste), as part of the principles of sustainable development and the circular economy, is widely recognized by and of great interest to a wide range of scientists around the world.

The following are some of the major areas in which papers are solicited:

  • A circular economy in waste management;
  • Innovative practices in the management of organic fertilizers;
  • The monitoring of soil pollution by trace elements and organic contaminants;
  • The reclamation and revitalization of contaminated soils;
  • Ecotoxicity assessments and ecological risk assessment;
  • Organic fertilization impact on soil fertility and its effect on soil environment and plants;
  • The agricultural usefulness of organic fertilizers and waste products enriching soil with organic matter (sludges and industrial composts) and raw materials deacidifying soils (calcium or calcium–magnesium fertilizers);
  • Comparisons of the effect of organic and mineral fertilization on soil quality and yield quality;
  • The fertilization value of organic materials and organic fertilizers;
  • Best practices in solid waste collection and recycling—the generation and characterization of waste;
  • Recycling and reuse;
  • Treatment (mechanical, biological, chemical, thermal, and other);
  • Innovative mineral fertilizers with the addition of organic matter.

Dr. Monika Mierzwa-Hersztek
Guest Editor

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Keywords

  • circular economy
  • organic matter
  • nutrients
  • plant quality
  • exogenic organic matter
  • soil improvers
  • waste management
  • ecological risk assessment
  • microorganisms
  • enzymatic activity
  • soil pollution

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Published Papers (1 paper)

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Research

14 pages, 1602 KB  
Article
Impacts of Organic Fertilizer Substitution on Soil Ecosystem Functions: Synergistic Effects of Nutrients, Enzyme Activities, and Microbial Communities
by Weidan Lu, Yuanhang Zhou, Xiaolong Ma, Jianglong Gao, Jianfu Guo, Xiaoqin Fan, Wang Xing, Weishi Gao, Ming Lin and Ronghua Wang
Agronomy 2025, 15(12), 2798; https://doi.org/10.3390/agronomy15122798 - 4 Dec 2025
Viewed by 345
Abstract
This study aimed to investigate the effects of varying organic fertilizer substitution ratios on soil nutrients, organic matter, enzyme activities, and microbial communities, with the goal of optimizing fertilization strategies, enhancing soil fertility, and promoting sustainable agricultural development. Experimental Design: A three-year consecutive [...] Read more.
This study aimed to investigate the effects of varying organic fertilizer substitution ratios on soil nutrients, organic matter, enzyme activities, and microbial communities, with the goal of optimizing fertilization strategies, enhancing soil fertility, and promoting sustainable agricultural development. Experimental Design: A three-year consecutive field experiment was conducted using an equal nitrogen application design with the following treatments: no fertilizer control (CK), conventional farmer fertilization (CF), and organic fertilizer substitutions at 10% (SF1), 20% (SF2), 30% (SF3), 40% (SF4), and 50% (SF5) of chemical fertilizer. Key soil parameters were analyzed, including available nutrients (alkali-hydrolyzable nitrogen, available phosphorus, and available potassium), organic matter content, enzyme activities (e.g., urease and phosphatase), and microbial community structure (bacterial and fungal diversity and abundance). Results: Partial substitution with organic fertilizer significantly enhanced soil available nutrient content and organic matter levels, with the 30–50% substitution treatments (SF3–SF5) demonstrating particularly pronounced effects. Moreover, organic fertilizer amendments markedly improved soil enzyme activities and altered microbial community composition, notably increasing the abundance of beneficial taxa such as Gemmatimonadota. These modifications further facilitated soil nutrient cycling and utilization efficiency. Conclusions: The findings demonstrate that appropriate organic fertilizer substitution not only improves soil fertility but also enhances microbial activity, thereby creating a healthier soil environment for crop growth. This study provides critical theoretical and practical insights for optimizing fertilization regimes, reducing chemical fertilizer reliance, and improving soil ecosystem functionality. Full article
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