Influence of biochar application on growth of Oryza sativa and its associated soil microbial ecology
- 60 Downloads
In this study, biochar was produced from three biomass feedstocks such as fruits of Cassia fistula and Caesalpinia sp. and barks of Eucalyptus globulus. The samples of the obtained biochar were characterized for pH, physiochemical properties, surface morphology, and surface functional groups. The obtained biochar samples were further studied with/without the combination of urea for their plant growth enhancement properties including the germination studies and effect on shoot and root growth of rice plants. Biochar produced from C. fistula fruits at 1.5% concentration increased the plant shoot height 18% higher than the control plants. Eucalyptus sp. barks’ biochar application at 0.5% concentration also increased the plant shoot height 12% longer than the control. However, the biochar produced from Caesalpinia sp. did not increase the shoot length. Yet, a generalized increase in root length was observed with the application of biochar. The combined application of nitrogen fertilizer (urea) and biochar together reverted the effect of biochar on the shoot length increase. Phospholipid-derived fatty acid (PLFA) characterization of soil revealed that soil biota shifts when soil was supplemented with the biochar. The bacterial community increased and a loss of fungal community was observed with the application of biochar.
KeywordsBiochar Agro residues PLFA Gasifier Biomass feedstocks Soil ecology
Financial support from the Science and Engineering Research Board (SERB), India (File No. ECR/2017/003397) is greatly acknowledged. The authors thank the National Institute of Technology Rourkela for providing the necessary research facilities. The authors acknowledge SAIF, IIT Madras for the use of ICP-OES in measuring CEC property which is presented in the paper. The authors greatly acknowledge the Ministry of Human Resources Development of Government of India for supporting the master’s programme of the first author.
Compliance with ethical standards
Conflict of interest
No potential conflict of interest was reported by the authors.
- 1.Balasubramanian P & Karthickumar P (2017) Biofertilizers and biopesticides: a holistic approach for sustainable agriculture. In: Sustainable utilization of natural resources. pp 255–284. https://doi.org/10.1201/9781315153292
- 5.Glaser B (2000) Persistence of soil organic matter in archaeological soils (terra preta) of the Brazilian amazon region. pp. 190–194 (No. Reserva Biblioteca/631.417 S964s). En: Sustainable management of soil organic matter. CAB International, OxonGoogle Scholar
- 17.Downie A, Crosky A, Munroe P (2009) Physical properties of biochar. In: Lehmann J, Joseph S (eds) Biochar for environmental management: science and technology. Earthscan, London, pp 13–32Google Scholar
- 34.Chan KY, Xu Z (2009) Biochar: nutrient properties and their enhancement. Biochar Environ Manag Sci Technol 1:67–84Google Scholar
- 38.Graber ER, Elad Y (2013) Biochar impact on plant resistance to disease. Biochar Soil Biota 278Google Scholar
- 39.Jin H (2010) Characterization of microbial life colonizing biochar and biochar-amended soilsGoogle Scholar
- 48.Watzinger A, Feichtmair S, Kitzler B, Zehetner F, Kloss S, Wimmer B et al (2014) Soil microbial communities responded to biochar application in temperate soils and slowly metabolized 13C-labelled biochar as revealed by 13C PLFA analyses: results from a short-term incubation and pot experiment. Eur J Soil Sci 65(1):40–51CrossRefGoogle Scholar