Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach

Acidic soils limit plant nutrient availability, leading to deficiencies and reduced crop yields. Agricultural liming agents address these issues and are crucial for deploying silicate amendments used in enhanced rock weathering (ERW) for carbon sequestration and emission reduction. Grower recommenda...

Full description

Saved in:
Bibliographic Details
Published in:Land (Basel) 2024-11, Vol.13 (11), p.1839
Main Authors: Araujo, Francisco S. M., Chacon, Andrea G. M., Porto, Raphael F., Cavalcante, Jaime P. L., Chiang, Yi Wai, Santos, Rafael M.
Format: Article
Language:English
Subjects:
Acid digestion
Acidic soils
Acidity
agricultural index
Analysis
Basalt
Calcite
Calcite crystals
Carbon
Carbon content
Carbon sequestration
Carbonates
Clay
climate change
Crop yield
Dissolution
Efficiency
Emissions control
ERW
Farmers
Fineness
Influence
Kimberlite
Liming
Methods
Mineralogy
Minerals
Montmorillonite
Neutralization
Nutrient availability
Olivine
Plant growth
Productivity
Rocks
Silica
Silicates
Soils
Statistical analysis
Statistical tests
Sustainability
sustainable agriculture
Weathering
Wollastonite
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Acidic soils limit plant nutrient availability, leading to deficiencies and reduced crop yields. Agricultural liming agents address these issues and are crucial for deploying silicate amendments used in enhanced rock weathering (ERW) for carbon sequestration and emission reduction. Grower recommendations for liming agents are based on the liming index (LI), which combines the neutralizing value (NV) and fineness rating (FR) to predict a mineral’s acidity neutralization relative to pure calcite. However, the LI was originally developed for carbonate minerals, and its applicability to silicates remains uncertain, with studies often yielding inconclusive results on soil carbon and liming efficiency. This study aims to evaluate the liming efficiency of silicates. We determined the LI of five candidate ERW minerals (basalt, olivine, wollastonite, kimberlite, and montmorillonite) and compared them to pure calcite. Post-NV acid digestion, we characterized the minerals and soils, applying nonparametric statistical tests (Wilcoxon, Kendall) to correlate liming results with LI, dosage, and amendment methods. We developed an empirical model incorporating mineralogy and kinetics to explain silicate behavior in liming, considering soil, climate, and crop factors.
ISSN:2073-445X
2073-445X
DOI:10.3390/land13111839