Biochar is a solid product formed by the pyrolysis of biomass (such as crop straw, forest waste, animal manure, etc.) in a high temperature and anoxic environment. In recent years, biochar, as a carbon-fixing soil improvement material, has attracted much attention at home and abroad. The purpose of this paper is based on the research progress of the properties of biochar and its impact on soil environmental functions based on bibliometric analysis. The effect on soil microbial biomass was evaluated, and the differences in this effect were further analyzed according to soil properties, biochar properties and experimental conditions. Then, the cinnamon soil polluted by long-term heavy metals in site A was selected for the field experiment of carbonaceous biomass remediation. The test results showed that with the increase of the amount of biomass char added, the ratio of MBC to MBN in each soil layer increased first, then decreased and then increased; the BC2 treatment rate was the highest in the 0-10 cm soil layer, which was 5.87, the 10-10 cm soil layer was the highest, and the 20-cm and 20-40 cm soil layers had the highest BC5 treatment rates, which were 7.11 and 8.46, respectively.

Pushpitan Iarjaz. Research Progress on the Properties of Biochar and its Impact on Soil Environmental Functions Based on Bibliometric Analysis. Academic Journal of Environmental Biology (2021), Vol. 2, Issue 2: 21-29. https://doi.org/10.38007/AJEB.2021.020203.

[1] José Álvarez-García, A Durán-Sánchez, María de la Cruz del Río-Rama. Systematic Bibliometric Analysis on Kaizen in Scientific Journals. Tqm Journal, 2018, 30(4):356-370. https://doi.org/10.1108/TQM-12-2017-0171

[2] Md, Shafiqul, Islam Y, et al. Watering techniques and zero-valent iron biochar pH effects on As and Cd concentrations in rice rhizosphere soils, tissues and yield. Journal of Environmental Sciences, 2021, v.100(02):146-159. https://doi.org/10.1016/j.jes.2020.07.002

[3] Brennan C, Laubscher M, Maqungo S, et al. Bibliometric analysis of research on the effects of human immunodeficiency virus in orthopaedic and trauma surgery. World Journal of Orthopaedics, 2021, 12(3):94-177. https://doi.org/10.5312/wjo.v12.i3.169

[4] Fusco F, Ricci P . What is the stock of the situation? A bibliometric analysis on social and environmental accounting research in public sector. International Journal of Public Sector Management, 2018, 32(1):21-41.

[5] Weber K, Quicker P . Properties of biochar. Fuel, 2018, 217(APR.1):240-261. https://doi.org/10.1016/j.fuel.2017.12.054

[6] Alchouron J, Navarathna C, Chludil H D, et al. Assessing South American Guadua chacoensis bamboo biochar and Fe_3O_4 nanoparticle dispersed analogues for aqueous arsenic(V) remediation. The Science of the Total Environment, 2020, 706(Mar.1):135943.1-135943.15.

[7] Kumar M A, Sinha M S, Jameel M J, et al. Telemedicine trends in orthopaedics and trauma during the COVID-19 pandemic: A bibliometric analysis and review. Journal of Taibah University Medical Sciences, 2021, 17( 2):203-213. https://doi.org/10.1016/j.jtumed.2021.09.003

[8] Albort-Morant G, AL Leal-Rodríguez, V Fernández-Rodríguez, et al. Assessing the origins, evolution and prospects of the literature on dynamic capabilities: A bibliometric analysis. European Research on Management & Business Economics, 2018, 24(1):42-52. https://doi.org/10.1016/j.iedeen.2017.06.004

[9] Nagariya R, Kumar D, Kumar I . Service supply chain: from bibliometric analysis to content analysis, current research trends and future research directions. Benchmarking: An International Journal, 2021, 28(1):333-369. https://doi.org/10.1108/BIJ-04-2020-0137

[10] Atzeni G, Vignali G, Tebaldi L, et al. A bibliometric analysis on collaborative robots in Logistics 4.0 environments. Procedia Computer Science, 2021, 180(1):686-695.

[11] Yakkanti R, Greif D N, Wilhelm J, et al. Unicondylar Knee Arthroplasty: A Bibliometric Analysis of the 50 Most Commonly Cited Studies. Arthroplasty Today, 2020, 6(4):931-940.

[12] Jones D C . Jaroslav Vanek, participation and labor management: an assessment including some bibliometric analysis. Journal of Participation and Employee Ownership, 2020, 3(2/3):93-105.

[13] Tsigaris P, Silva J . Bibliometric analysis of a controversial paper on predatory publishing. Performance Measurement and Metrics, 2020, 22(1):39-47.

[14] Park B S, Kim I H, Kang M P . Top 100 Cited Articles on Sleep Medicine: A Bibliometric Analysis. European Neurology, 2020, 83(1):1-9. https://doi.org/10.1159/000507393

[15] Saikia K, M Vallès, Fabregat A, et al. A bibliometric analysis of trends in solar cooling technology. Solar Energy, 2020, 199(4):100-114.

[16] Lampe J, Kraft P S, Bausch A . Mapping the Field of Research on Entrepreneurial Organizations (1937–2016): A Bibliometric Analysis and Research Agenda:. Entrepreneurship Theory and Practice, 2020, 44(4):784-816. https://doi.org/10.1177/1042258719851217

[17] Guleid F H, Oyando R, Kabia E, et al. A bibliometric analysis of COVID-19 research in Africa. BMJ Global Health, 2021, 6(5):727-33. https://doi.org/10.1136/bmjgh-2021-005690

[18] Soetrisno F N, Delgado-Saborit J M . Chronic exposure to heavy metals from informal e-waste recycling plants and children's attention, executive function and academic performance. The Science of the Total Environment, 2020, 717(May15):137099.1-137099.12.

[19] Garcia-Gomez C, Garcia S, Obrador A, et al. Effect of ageing of bare and coated nanoparticles of zinc oxide applied to soil on the Zn behaviour and toxicity to fish cells due to transfer from soil to water bodies. The Science of the Total Environment, 2020, 706(Mar.1):135713.1-135713.11.

[20] Soliemanzadeh A, Fekri M . Effects of green iron nanoparticles on iron changes and phytoavailability in a calcareous soil. Pedosphere, 2021, 31( 5):761-770. https://doi.org/10.1016/S1002-0160(21)60035-8