Indian Journal of Agricultural Research

  • Chief EditorT. Mohapatra

  • Print ISSN 0367-8245

  • Online ISSN 0976-058X

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  • SJR .258 (2022)

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Research Article

Dynamics of C and N in a clay loam soil amended with biochar and corn straw

George O. Odugbenro, Zhihua Liu, Yankun Sun
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1College of Resources and Environment, Northeast Agricultural University, Harbin 150 030, PR China.
Cite article:- Odugbenro O. George, Liu Zhihua, Sun Yankun (2019). Dynamics of C and N in a clay loam soil amended with biochar and corn straw. Indian Journal of Agricultural Research. 53(6): 675-680. doi: 10.18805/IJARe.A-403.

ABSTRACT

An incubation study was conducted to determine the influence of biochar and corn straw on CO2-C emission, soil organic C, microbial biomass C and N, total N, and mineral N (NH4+-N and NO3--N) in a clay loam soil. Six treatments viz., CK (Control); S (Soil + 1% straw); B1 (Soil + 0.5% biochar); B2 (Soil + 2% biochar); SB1 (Soil + 1% straw + 0.5% biochar); SB2 (Soil + 1% straw + 2% biochar) were tested with three replications. Results showed that straw addition to soil with or without biochar increased CO2-C emission while sole-biochar addition (2%) reduced it. Straw and biochar also increased the soil microbial biomass C and N but greatest increase in microbial biomass N (111.9 µg g-1) was recorded by biochar-straw combination. SOC and total N significantly increased following biochar and straw additions which suggest that organic amendments can improve soil chemical properties. Additionally, for soil mineral N, biochar reduced NH4+-N and NO3--N concentrations while straw increased NH4+-N concentration but greatly reduced  that of NO3--N.

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