Biochar Amendment as a Mitigation Against Freezing–Thawing Effects on Soil Hydraulic Properties

Agronomy, Journal Year: 2025, Volume and Issue: 15(1), P. 137 - 137

Published: Jan. 8, 2025

Seasonal freeze–thaw cycles compromise soil structure, thereby increasing hydraulic conductivity but diminishing water retention capacity—both of which are essential for sustaining crop health and nutrient in agricultural soils. Prior research has suggested that biochar may alleviate these detrimental effects; however; further investigation into its influence on properties through is essential. This study explores the impact evaluates potential peanut shell to mitigate effects. Peanut was used, effects unsaturated were evaluated evaporation tests. The findings indicate predominantly affect clay’s ability retain control by generating macropores fissures; with a notable increase at high matric potentials. lessens as decreases below −30 kPa, resulting smaller differences conductivity. Introducing helps converting large pores micro- or meso-pores, effectively retention, especially higher content biochar. While biochar’s more pronounced potentials, it also significantly reduces lower total porosity increased under low application rates (0% 1%) declined (2% 3%) number increased. Furthermore, characteristics deformation during shifted from frost heaving thaw settlement rates. Notably, an optimal rate observed induced processes. These contribute scientific understanding necessary development management sustainable systems.

Language: Английский

Using biochar to immobilize the heavy metal Cd mobilized by covered soil‐cultivated edible fungi Dectyophora rubrovolvata

Soil Use and Management, Journal Year: 2025, Volume and Issue: 41(1)

Published: Jan. 1, 2025

Abstract Because of the worsening soil Cd pollution, safe production covered soil‐cultivated edible fungi Dectyophora rubrovolvata is facing serious threats. However, use biochar for heavy metal immobilization differs from conventional remediation processes as a result rhizospheric acidification and presence dissolved organic matter. Therefore, this study investigated changes in soils availability speciation, matter components after D. cultivation addition. The results showed that mycelium inoculation increased HAc‐Cd, CaCl 2 ‐Cd DTPA‐Cd concentrations by 4.7%, 131.7% 11.4%, respectively. Treatment with three types reduced 8.7%–25.2%, 16.4%–24.5% 10.7%–15.8%, respectively, significantly decreased absorption. secreted led to transformation residual exchangeable Cd. Biochar mitigated migration activated neutralizing acidification, adsorbing matter, specifically elements. In conclusion, demonstrates effective metals used reduces

Language: Английский

Effects of Mg-Palygorskite Modified Biochar on the Growth of Sedum alfredii Hance in Heavy Metal Contaminated Soil

Plants, Journal Year: 2025, Volume and Issue: 14(5), P. 790 - 790

Published: March 4, 2025

Heavy metal contamination of soil poses a serious threat to agricultural production and human health. Biochar modified with Mg palygorskite can reduce the content available heavy metals in soil; however, its passivation effect is affected by modification method, there lack research on impact plant growth heavily polluted soil. In this study, four types biochar were prepared using MgCl2, palygorskite, wood as raw materials, including MBC MPB pre-modification BCM BPM post-modification. Sedum alfredii Hance was selected test plant, pot experiment conducted explore effects unmodified Cu, Pb, Zn, Cd. Compared original biochar, especially pre-modified significantly increased ash content, pH, O/C ratio, surface functional group count, mineral content. The adsorption capacity for also enhanced, main mechanisms being precipitation, complexation, ion exchange. promoted biomass varying degrees, promotion order > BCM, more significant 3% addition. reduced rhizosphere soil, addition had greatest effect. Further analysis via Mantel structural equation modeling confirmed that reducing increasing NO3−-N AP contents. This study provides data support development functionalized remediation pollution

Language: Английский