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Elevated Temperature and Carbon Dioxide alter the Tea Rhizosphere Soil Dynamics

1, 2, 3, 4

  1. 1Department of Life Sciences, Dibrugarh University, Dibrugarh, Assam, INDIA.
  2. 2Debraj Roy College, Golaghat, Assam, INDIA.
  3. 3Department of Mycology and Microbiology, Tocklai Tea Research Institute, Jorhat, Assam, INDIA.
  4. 4Soils Department, Climate and GIS Lab, Tocklai Tea Research Institute, Jorhat, Assam, INDIA.

CORRESPONDENCE

Ajmeri Sultana Rahman

Department of Life Sciences, Dibrugarh University, Dibrugarh, Assam, INDIA.

ajmerirahman789@outlook.com

Received: 12-09-2023; Revised: 12-10-2023; Accepted: 25-11-2023.

Volume 12, Issue 3 · pp. 580-586 · 2024 · DOI: 10.5530/ajbls.2023.12.76

ABSTRACT

Aim: The aim of this work is to explore the impact of climate change on the tea rhizosphere soil dynamics. The experiment sought to study the tea rhizosphere Soil Organic Carbon (SOC), Total Nitrogen (TN), Microbial Biomass Carbon (MBC), and Microbial Biomass Nitrogen (MBN) under elevated levels of temperature and Carbon Dioxide (CO2).Materials and Methods: The experimental design was set up with two Open Top Chamber (OTC) facilities, creating localized conditions with increased temperature and CO2. Both temperature and CO2 were elevated in OTC-1 (eTemp+eCO2), with a CO2 concentration of 550 ppm, while in OTC-2 (eTemp), only the temperature was elevated. Temperature was 1.5-2ºC higher than ambient. Four tea cultivars (TV1, TV20, TV22, and TV23) were placed inside the OTCs, and rhizosphere soil samples were collected at regular intervals.Results: The results indicated that in the eTemp+eCO2 treatment, over the period of time, the rate of change in SOC showed a significant increase (p<0.01) compared to the control, while TN showed no significant variations. The rate of change in MBC showed a significant increase (p<0.05) in the eTemp treatment. No significant variation was observed in the rate of change in MBN. Overall, SOC and MBC, after 300 hr of treatments, showed a significant increase (p<0.001) in both eTemp and eTemp+eCO2 treatments when compared to the control. However, after 300 hr of treatment, overall soil TN exhibited a significant increase (p<0.05) in the eTemp+eCO2 treatment.Conclusion: This study addresses the research gap through evidence-based experimental work that monitors the impact of temperature and CO2 on the tea rhizosphere. From the study, it can be concluded that elevated temperature and CO2 alter the rate of change in the soil organic carbon pool of tea rhizosphere soil along with the accumulation of biomass carbon, whereas no such alteration was found for microbial biomass nitrogen.

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    Rahman, A. S., Barukial, J., Sarmah, S. R., & Baruah, R. D. (2024). Elevated Temperature and Carbon Dioxide alter the Tea Rhizosphere Soil Dynamics. Asian Journal of Biological and Life Sciences, 12(3), 580-586. https://doi.org/10.5530/ajbls.2023.12.76

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    © 2024 Author(s)

    This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited. CC BY 4.0