Effect of Biochar Application on Soil Carbon Fluxes from Sequential Dry and Wet Cultivation Systems

Abstract

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 CO 2 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 CO 2 . Biochar application was ineffective to control CH 4 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 CO 2 from submerged soils.

Variations in Fungal Diversity in a Biochar-Treated Continuous Cotton-Cropped Soil Environment Through Metagenomics-Based Analyses

“…Therefore, there is a need for urgent remedial action to strengthen the future of food security for the rapidly expanding human population. A good approach towards that is by finding sustainable mitigation ways to the hindered agricultural sector [2]. The trend in climatic change that is brought about by global warming has resulted in widespread famine conditions in many parts of the world [1].…”

“…The trend in climatic change that is brought about by global warming has resulted in widespread famine conditions in many parts of the world [1]. The sequestration of major nutrients that are key to enhanced crop production are the current key techniques in combating the expanding impacts of global warming and climate change to agricultural productivity [2][3]. Currently, the most preferred nutrient-enhancing techniques are those with minimum interference with soil microbiota such as the ecologically significant fungi [4].…”

“…The few existing studies that have focused on the effects of biochar application on the soil microbial community assemblage have widely considered the influence of long-term continuous biochar application (more than 20 years) on the bacterial community rather than on the fungal community [8]. Furthermore, the majority of these studies have not interpretively applied the highly reliable modern bioinformatic and biostatistical techniques in assessing either the availability of bacterial or fungal community and soil quality on longterm (up to 40 years) biochar application [2,8,10].…”

Effects of Combined Nitrogenous Based Inorganic Fertilizers and Two Forms of Organic Fertilizers on Plant Phenotypic Characteristics and Soil Bacterial Community Structure within a Cotton Field Environment

“…Equally, inorganic fertilizers like the N fertilizer have had an impressive contribution in improving crop yields [20]. Indeed, different forms of nitrogenous fertilizers have been used singly in agricultural farms to increase productivity [21]. In addition, most cotton farmers have resorted to the use of soil conditioning techniques to help restore soil integrity and consequently improve cotton productivity [22].…”

Morphological Properties and Nutrient Status of Different Waste Derived Slow Pyrolyzed Biochars

“…pyrolysis represents a significant environmental management and economic achievement. Waste can be reused as biochar, a solid product rich in carbon as 65 to 95 percent [1][2][3][4].…”