Biochar type and pyrolysis temperature effects on soil quality indicators and structural stability

Journal of Environmental Management
N SaffariA I Mamedov

Abstract

Quality of soils of the arid zones with low organic matter can be improved through the application of natural amendments especially biochar from various available feedstocks. The objective of this study was to evaluate the impacts of corn residue and poultry manure and their biochars on soil organic carbon (SOC), hot-water soluble carbohydrates (HWSC), basal soil respiration (BSR),and structural stability determined by HEMC (high-energy moisture characteristic). A sandy loam soil in pots were thoroughly mixed with 1, 2 and 4% w/w of corn residues (CR) and poultry manure (PM) feedstock and their biochars prepared at 350 and 650 °C of slow pyrolysis. Maize seeds were planted in pots and grown until physiological maturity when soil characteristics were measured. Treatments considerably altered the means of studied soil quality indicators, and increased SOC (1.5-10 times) and HWSC (1-7 times), and HEMC indices: volume of drainable pores ratio (VDPR, 1.5- 3.5 times), and stability ratio (SR, 1-3 times). Increasing pyrolysis temperature, regardless of the type and rate of feedstock, significantly decreased the SOC, BSR and percent of water-stable aggregates, and consequently structural stability indices. Contribution of both PM feeds...Continue Reading

References

Sep 1, 2014·Journal of Environmental Management·Jayne H WindeattSurjit Singh
Jan 21, 2015·Journal of Environmental Quality·J A IppolitoR S Dungan
Feb 9, 2017·Journal of Environmental Quality·K G I D KumariLis W de Jonge
Jun 15, 2018·Bioresource Technology·Kiatkamjon IntaniJoachim Müller
Dec 6, 2018·Journal of Environmental Management·Balasubramani RavindranJaeJoung Lee

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