Effects of Different Biostimulants and Biochars on Crop Production and Quality

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

Deadline for manuscript submissions: 31 October 2025 | Viewed by 669

Special Issue Editors


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Guest Editor
Department of Life Sciences, University of Siena, 53100 Siena, Italy
Interests: bio-based product; wood distillate; biochar; crop production; secondary metabolites; sustainable agriculture
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Turin, Italy
Interests: physiological, biochemical, and molecular responses of plants to abiotic stresses such as deficiencies of natural resources (e.g., nutrients and water) or salinity; analysis of the effects of biofertilizers (i.e., biochar and wood distillate) on the soil–plant system; the use of solid and liquid byproducts of hydrothermal carbonization (HTC) in soilless culture systems; analysis of the impact of micro(bio)plastics on plant yield and soil quality
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The use of biostimulants and biochar is gaining increasing attention in sustainable agriculture due to their potential to enhance crop productivity, improve soil health, and boost plant resilience to stress. Biostimulants—including humic substances, seaweed extracts, and microbial inoculants—stimulate plant growth and physiological processes, while biochar improves soil structure, nutrient availability, water retention, and long-term carbon sequestration. Although both have demonstrated individual benefits, their combined effects on plant performance and soil dynamics remain underexplored and warrant further investigation. This Special Issue aims to delve into the integrated role of biostimulants and biochar in modern agricultural systems. We invite original research articles, comprehensive reviews, meta-analyses, and case studies focusing on their application, interactions, and underlying mechanisms. Topics of interest include improvements in crop yield and quality, soil fertility, microbial activity, and environmental sustainability. Contributions should offer new insights into how these tools can advance sustainable farming practices and promote resilient agroecosystems.

Dr. Riccardo Fedeli
Dr. Silvia Celletti
Guest Editors

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Keywords

  • biostimulants
  • biochar
  • wood vinegar
  • seaweed extract
  • humic substances
  • protein hydrolyzates
  • crop production
  • plant fitness

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Published Papers (1 paper)

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Research

20 pages, 1163 KB  
Article
Biochar Application Methods Matter: Biochemical and Enological Responses of an Italian Field-Grown Grapevine (Vitis vinifera L.) Using Solid and Liquid Formulations
by Riccardo Fedeli, Silvia Celletti and Stefano Loppi
Agronomy 2025, 15(9), 2124; https://doi.org/10.3390/agronomy15092124 - 4 Sep 2025
Viewed by 406
Abstract
Viticulture is increasingly seeking sustainable practices that enhance grape quality while reducing reliance on synthetic inputs. Among bio-based strategies, biochar has attracted growing interest for its potential to improve soil fertility and influence plant metabolism. However, its effects can vary depending on formulation [...] Read more.
Viticulture is increasingly seeking sustainable practices that enhance grape quality while reducing reliance on synthetic inputs. Among bio-based strategies, biochar has attracted growing interest for its potential to improve soil fertility and influence plant metabolism. However, its effects can vary depending on formulation and application methods. This study evaluated the effects of the use of solid (SB) and liquid biochar (LB) on the biochemical and nutritional composition in leaves, berry skins, and must of a grapevine (Vitis vinifera L., cv. Sangiovese) cultivated in a vineyard in Tuscany (Italy). SB was applied once to the soil at 2.5% (w/w), while LB was applied five times/season at 10% (v/v) via fertigation. Results revealed formulation-specific effects on grapevine physiology and fruit composition. SB maintained leaf chlorophyll concentrations, increased total soluble proteins (+65%), total polyphenols (+57%), and tannin content (+33%) in berry skins and must, and reduced Cu and Zn. Conversely, LB reduced leaf chlorophyll concentrations (−24%) and nutrient contents (P, Fe, Cu, and Zn), but increased total flavonoids (+13%), antioxidant capacity (+20%), and vitamin C (+18%) in berry skins, alongside higher fructose and reducing sugars in musts. The findings highlight biochar’s potential as a bio-based input in viticulture, emphasizing the importance of formulation and application strategy. SB appears suited to long-term soil improvement and enhanced phenolic richness, while LB may modulate sugar metabolism for targeted enological outcomes. Full article
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