Proceedings of the Environmental Science and Technology International Conference (ESTIC 2021)

Soil Erosion and Soil Organic Carbon in the Forest-Steppe Zone: A Case Study in Baga Mukhar, West Khentei, Mongolia

Authors
Batkhishig Ochirbat1, *, Telmen Turmunkh1
1Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
*Corresponding author. Email: batkhishigo@mas.ac.mn
Corresponding Author
Batkhishig Ochirbat
Available Online 1 November 2021.
DOI
https://doi.org/10.2991/aer.k.211029.002How to use a DOI?
Keywords
Cesium-137; forest-steppe; Mongolia; Soil erosion; Soil organic carbon
Abstract

Specifics and relationships between soil erosion and soil organic carbon in the Mongolian forest-steppe were studied in this research, in a case of Baga Mukhar catchment, west Khentei. Soil erosion was estimated by the Cesium-137 isotope tracing method. For estimation of soil redistribution rates from inventories of 137Cs, diffusion migration model used in grazing lands and mass balance model-2 used in cultivated land. In total, 38 soil samples were taken from 5 isosectors. The mean soil redistribution of the catchment was -3.67 t ha-1 y-1. In cultivated land, soil erosion was the highest with a value of -15.47 t ha-1 y-1 and it gets higher (-24.43 t ha-1 y-1) if we take into account that the cultivated land is located at the bottom of the valley where has deposition. Soil erosion in the south-facing slopes is 5.1 times higher than north-facing slopes, which shows slope differences significantly influence vegetation growth and soil erosion. The average soil organic carbon of the study area is 4.37 %. SOC was highest in the forest area (7.33 %) and the lowest in the agriculture field (2.48 %). SOC in the north facing slope was 2.4 times higher than the south facing slope. Isosectors mean value of soil redistribution and SOC is comparatively well corresponded (r2=0.567). Soil erosion and soil organic loss in agriculture is a significant, it needs more appropriate management practice and soil conservation activities in the Mongolian forest-steppe.

Copyright
© 2021 The Authors. Published by Atlantis Press International B.V.
Open Access
This is an open access article under the CC BY-NC license.

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Volume Title
Proceedings of the Environmental Science and Technology International Conference (ESTIC 2021)
Series
Advances in Engineering Research
Publication Date
1 November 2021
ISBN
978-94-6239-446-9
ISSN
2352-5401
DOI
https://doi.org/10.2991/aer.k.211029.002How to use a DOI?
Copyright
© 2021 The Authors. Published by Atlantis Press International B.V.
Open Access
This is an open access article under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Batkhishig Ochirbat
AU  - Telmen Turmunkh
PY  - 2021
DA  - 2021/11/01
TI  - Soil Erosion and Soil Organic Carbon in the Forest-Steppe Zone: A Case Study in Baga Mukhar, West Khentei, Mongolia
BT  - Proceedings of the Environmental Science and Technology International Conference (ESTIC 2021)
PB  - Atlantis Press
SP  - 7
EP  - 13
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211029.002
DO  - https://doi.org/10.2991/aer.k.211029.002
ID  - Ochirbat2021
ER  -