Innovative Fertilization Strategies for Sustainable Agriculture

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant–Soil Interactions".

Deadline for manuscript submissions: 28 February 2026 | Viewed by 597

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MED—Mediterranean Institute for Agriculture, Environment and Development, Departamento de Fitotecnia, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
Interests: vegetable crops; vegetable production systems; greenhouse and open-field systems; fertigation; root dynamics; salinity; organic fertilization and soilless cultivation
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Special Issue Information

Dear Colleagues,

Soil degradation presents a major challenge to global agriculture, threatening long-term productivity and food security. Key factors such as erosion, compaction, loss of organic matter, salinization, and acidification are increasingly compromising soil health. It is estimated that up to 40% of arable soils are acidic and approximately 20% of irrigated land suffers from salinization. Climate change further exacerbates these issues by accelerating degradation processes and contributing to greenhouse gas emissions.

Although inorganic fertilizers have played a vital role in achieving high crop yields, their extensive use raises serious environmental concerns, including increased greenhouse gas emissions and a significant carbon footprint. To address these challenges, innovative fertilization strategies are needed—approaches that reduce dependency on inorganic inputs while maintaining or enhancing soil fertility and supporting sustainable crop production.

Such strategies may include the use of biofertilizers, green manures, organic amendments, circular economy principles, and agronomic practices aimed at improving nutrient use efficiency. Integrating multiple methods can enhance both adaptability and effectiveness across diverse agroecological contexts.

This Special Issue invites original research, reviews, and case studies focusing on fertilization strategies that reduce reliance on inorganic fertilizers while sustaining crop productivity and minimizing environmental impact.

Dr. Rui Manuel Almeida Machado
Guest Editor

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Keywords

  • soil fertility
  • fertilization strategies
  • sustainable crop production
  • organic amendments
  • nutrient use efficiency

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Published Papers (1 paper)

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Research

24 pages, 3720 KB  
Article
Effects of Microbial Fertilizer Combined with Organic Fertilizer on Forage Productivity and Soil Ecological Functions in Grasslands of the Muli Mining Area
by Zongcheng Cai, Jianjun Shi, Shouquan Fu, Fayi Li, Liangyu Lv, Qingqing Liu, Hairong Zhang and Shancun Bao
Plants 2025, 14(20), 3156; https://doi.org/10.3390/plants14203156 - 14 Oct 2025
Viewed by 414
Abstract
To address grassland ecosystem degradation caused by mining disturbance and its severe threats to regional ecological security in alpine mining areas, this study systematically evaluated the synergistic effects of different application ratios of Effective Microorganisms inoculant and organic fertilizers on artificial grassland ecosystem [...] Read more.
To address grassland ecosystem degradation caused by mining disturbance and its severe threats to regional ecological security in alpine mining areas, this study systematically evaluated the synergistic effects of different application ratios of Effective Microorganisms inoculant and organic fertilizers on artificial grassland ecosystem functions in the Muli alpine mining region of the Qinghai-Tibet Plateau, based on field experiments conducted from 2022 to 2024. The results demonstrated significant improvements in production performance. The Y2E2 treatment (0.60 t·hm−2 Effective Microorganisms inoculant + 20 t·hm−2 organic fertilizer) exhibited optimal effects, with aboveground biomass increasing by 75.97% and 68.88% in 2023 and 2024, respectively, compared to the control (p < 0.05), while belowground biomass simultaneously increased by 36.05% and 35.53% (p < 0.05), showing a sustained upward trend. Nutritional quality was markedly enhanced, with the Y2E2 treatment consistently achieving the best performance across both years. Crude protein and ether extract contents increased by 46.18%~46.52% and 62.42%~63.25%, respectively (p < 0.05), while soluble sugar content rose significantly by 19.49%~20.56% (p < 0.05). Concurrently, crude ash and fiber fractions were significantly reduced. Soil physicochemical properties improved substantially, with the Y2E2 treatment in 2024 reducing soil pH and bulk density by 11.10% and 37.20%, respectively (p < 0.05), while increasing soil organic carbon, available nitrogen, and available potassium by 92.94%, 49.25%, and 96.08% (p < 0.05). Soil biological activity was significantly enhanced, as evidenced by increases of 78.33%, 55.69%, 55.87%, and 183.67% in β-glucosidase, dehydrogenase, urease, and acid phosphatase activities, respectively (p < 0.05), alongside rises of 117.64% and 94.78% in microbial biomass carbon and phosphorus (p < 0.05). Mechanistic analysis via structural equation modeling revealed strong positive direct effects of the Effective Microorganisms inoculant–organic fertilizer combination on forage yield (β = 0.27, p < 0.001) and nutritional quality (β = 0.73, p < 0.001). Principal component analysis (cumulative variance explained: 88.90%) further confirmed Y2E2 treatment superior performance in soil improvement, microbial function enhancement, and grassland productivity. In conclusion, the optimal remediation strategy for alpine mining grasslands was identified as the combined application of 0.60 t·hm−2 Effective Microorganisms inoculant and 20 t·hm−2 organic fertilizer. This approach drives ecosystem function restoration through a multidimensional synergistic mechanism involving soil physicochemical amelioration–microbial activity stimulation–nutrient supply optimization, providing both theoretical foundations and practical solutions for ecological restoration of degraded grasslands in similar regions. Full article
(This article belongs to the Special Issue Innovative Fertilization Strategies for Sustainable Agriculture)
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