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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 22, No. 3, 2018, pp. 313-317
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Bioline Code: ja18055
Full paper language: English
Document type: Research Article
Document available free of charge
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Journal of Applied Sciences and Environmental Management, Vol. 22, No. 3, 2018, pp. 313-317
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Effect of rice husk Biochar (RHB) on some of chemical properties of an acidic soil and the absorption of some nutrients
GHORBANI, M & AMIRAHMADI, E
Abstract
The purpose of this study is to evaluate the biochemical effects of rice husk biochar (RHB)
obtained from pyrolysis of rice husk under limited oxygen conditions for three hours at temperature of 500 °C. Then,
the effect of addition of 2 and 4% biochar to acidic soil was studied. The samples were stored in greenhouse
conditions for three months, and then soil characteristics including pH, electrical conductivity, cation exchange
capacity and organic carbon content, potassium forms and total nitrogen content of soil were measured. The results
showed that RHB caused a significant increase in soil pH. RHB also increased significantly the organic carbon
content and electrical conductivity. Soluble, exchangeable and non-exchangable potassium were affected by the
addition of RHB. RHB caused 5-fold increased soluble potassium. The exchange rate of potassium increased from 76
mg / kg, with a RHB of 2% to 112 mg / kg with a 4% RHB application. Non- exchangable potassium also increased
from 290 in control to 532 mg / kg in 4% RHB. The usability of nitrogen and phosphorus was not affected by
biochar. Considering the significant increase in the amounts of different forms of potassium and considering the lack
of potassium in some acidic soils of Mazandaran province, we can consider the use of biochar as a source of
potassium in soil fertility management.
Keywords
pH of soil; cation exchange capacity; potassium
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© Copyright 2018 - Ghorbani et al.
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