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- Title
Evaluation of the changes induced by gasification biochar in a peat-sand substrate.
- Authors
Muter, Olga; Lebedeva, Galina; Telysheva, Galina
- Abstract
Gasification biochar represents one of the bio-char types tested for agricultural needs. The aim of this study was to clarify the physico-chemical and biological changes occurring in a peat-sand substrate amended with hardwood-derived gasifica-tion biochar in the rates of 2, 4 and 20 g l-1. The pH(H2O) of the substrate with 4 g l-1 and 20 g l-1 biochar was increased from 5.6 to 6.2 and 6.7, respectively. The testing of the substrate in the re-spirometry device showed that the increase in the biochar rate led to a decrease in the amount of CO2O evolved at the maximum pres-sure drop. The continuous decrease in pressure observed in the respirometry bottles filled with pure biochar allows explaining this effect by biochar sorption activity. Addition of 2 and 4 g l-1 biochar to the peat-sand substrate stimulated the growth of cucum-bers in an 18-day pot vegetation experiment. An increase in the number of root tips and root volume with a decreasing average root diameter was shown in the presence of biochar. Stimulation of plant growth on the background of low rates of biochar requires a further study with emphasis on the specific combination of bio-char, soil type, plant species, and climatic conditions.
- Subjects
BIOMASS gasification; BIOCHAR; SUBSTRATES (Materials science); AGRICULTURAL physics; PLANT growth; PLANT species; PH effect
- Publication
International Agrophysics, 2014, Vol 28, Issue 4, p471
- ISSN
0236-8722
- Publication type
Article
- DOI
10.2478/intag-2014-0037