Biochar and Ecosystem Function: Applications in Agroforestry, Urban, and Peri-Urban Soils

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Innovative Cropping Systems".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 3781

Special Issue Editors


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Guest Editor
Institute of Forestry and Conservation, University of Toronto, 33 Willcocks St., Toronto, ON M5S 3B3, Canada
Interests: biochar; forestry ecology; methane; carbon; physiological ecology; global change; silviculture
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E-Mail Website
Guest Editor
Institute of Forestry and Conservation, University of Toronto, 33 Willcocks St, Toronto, M5S 3B3, Canada
Interests: biochar; climate change; green infrastructure; forest ecology & management; biometeorology; biogeochemistry; remote sensing & GIS; designing cost-effective environmental sensor-logger systems

Special Issue Information

Dear Colleagues,

Ecosystem functions are key to sustaining various land-use systems, as they regulate essential ecological processes and biological systems. These functions depend on environmental conditions that are often threatened by climate change and increasing anthropogenic pressure; this is particularly true for highly disturbed ecosystems such as urban, peri-urban, and agroforestry systems. These managed systems face increasing pressures such as soil erosion, salinization, deposition of toxic metals and organic pollutants, nutrient depletion and imbalances, and reduced plant growth and net primary productivity. There has been increasing interest in using biochar, or pyrolyzed biomass added to soils, as a solution to address many of these challenges.

This Special Issue focuses on biochar applications in highly disturbed ecosystems. We intend to compile cutting-edge knowledge on biochar applications to restore and improve ecosystem functions, including (but not exclusive to) erosion control, nutrient retention, pollutant immobilization and detoxification, microbial community function, greenhouse gas emissions, and plant growth. We invite a variety of manuscript formats on this research topic, including, but not limited to, reviews, method papers, and original research, including both laboratory and field studies.

Prof. Dr. Sean Thomas
Dr. Md Abdul Halim
Guest Editors

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Keywords

  • ecosystem functions ecosystem services biochar
  • soil health greenhouse gas C sequestration plant growth agroforestry urban soil peri-urban soil climate change

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Published Papers (1 paper)

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Research

13 pages, 2752 KiB  
Article
Optimizing Biochar Particle Size for Plant Growth and Mitigation of Soil Salinization
by Esther Tang, Wenxi Liao and Sean C. Thomas
Agronomy 2023, 13(5), 1394; https://doi.org/10.3390/agronomy13051394 - 18 May 2023
Cited by 7 | Viewed by 3454
Abstract
Pyrolyzed waste biomass, or biochar, has been suggested as a means to increase plant growth and mitigate soil salinization, which is a widespread agricultural issue and can reach extreme levels in urban soils impacted by de-icing salts. Soil mixing is enhanced by reduced [...] Read more.
Pyrolyzed waste biomass, or biochar, has been suggested as a means to increase plant growth and mitigate soil salinization, which is a widespread agricultural issue and can reach extreme levels in urban soils impacted by de-icing salts. Soil mixing is enhanced by reduced biochar particle size; however, biochar properties vary with particle size, and recent studies have suggested that plant growth responses may be maximized at intermediate particle sizes. We examined the responses of two plant species (cowpea (Vigna unguiculata) and velvetleaf (Abutilon theophrasti)) to biochar amendments that spanned a wide range of particle sizes obtained by sieving, with and without de-icing salt additions. The smallest size fractions of biochar reduced plant growth relative to unamended controls. Plant biomass production was generally maximized at intermediate biochar particle size treatments, with particle sizes of 0.5–2.0 mm showing the best response. Mitigation of salt effects was also improved at intermediate biochar particle sizes in this particle size range. Our results emphasize the importance of optimizing biochar particle size to best enhance plant responses to biochar, with particular reference to saline soils. Full article
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