Author(s)

Mahmudul Islam Piash¹, Md. Faruque Hossain^2*, Ihuoma N. Anyanwu³, Shamim Al Mamun⁴, Zakia Parveen¹

¹Department of Soil, Water & Environment, University of Dhaka, Dhaka, Bangladesh.
²American International University-Bangladesh, Dhaka, Bangladesh.
³Department of Biology/Microbiology/Biotechnology, Federal University Ndufu-Alike Ikwo, Ikwo, Nigeria.
⁴Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.

Application of biochar has been highly credited for its potential to sequester carbon and GHG mitigation from tropical agro-ecosystems. However, experiments show inconsistent results depending on soil and biochar type, cultivation system, climatic condition and the type of evolved GHGs. This study emphasized on the effect of biochar on carbon emission trends from a sequential dry and wet cultivation system of Bangladesh. An incubation study was conducted with two contrasting soils and eight different treatments viz. control, only fertilizer, three different biochars (10 t·ha^-1) with and without recommended fertilizer dose. Results revealed the fact that, emission of carbon was substantially higher from Sara soil than Kalma soil. Biochar treatments did not have any easing effect on CO₂ emission at field condition; rather, increased in most of the cases. However, emission was significantly (P < 0.05) suppressed at submerged condition by biochar application. Non-fertilized water hyacinth biochar was most effective in this regard. In general, fertilizer application caused higher emission of CO₂. Biochar application was ineffective to control CH₄ and CO release to atmosphere and submergence further intensified their emission significantly. The overall results indicate that applied biochars have negligible effect on carbon emission except for reducing CO₂ from submerged soils.

Greenhouse Gases, Carbon Emission, CO₂, CH₄, CO, Emission from Submergence

Piash, M. , Hossain, M. , Anyanwu, I. , Mamun, S. and Parveen, Z. (2018) Effect of Biochar Application on Soil Carbon Fluxes from Sequential Dry and Wet Cultivation Systems. American Journal of Climate Change, 7, 40-53. doi: 10.4236/ajcc.2018.71005.