CURRENT STATUS OF SOIL MICROBIAL COMMUNITIES IN SPECIALIZED CITRUS-GROWING AREAS OF BAC QUANG DISTRICT, HA GIANG PROVINCE, VIETNAM
DOI:
https://doi.org/10.51453/3093-3706/2026/1407Keywords:
Soil microorganisms, Cellulose degradation, Phosphate solubilization, Nitrogen fixation, Citrus soilsAbstract
This study aimed to evaluate soil physicochemical properties and the abundance of microbial groups in citrus-growing soils in Bac Quang district, Ha Giang province. The results showed that soil organic matter ranged from 3.54 to 3.99%, total nitrogen from 0.185 to 0.203%, total P₂O₅ from 0.105 to 0.144%, and total K₂O from 0.93 to 1.69%, indicating a moderate nutrient status. The soils were strongly acidic (pHKCl 3.83 - 3.97) with moisture content ranging from 22.90 to 24.77%. The total aerobic microbial population reached 4.07 - 7.07 × 10⁶ CFU/g for bacteria, while fungi and actinomycetes were present at lower densities. Functional microbial groups were detected, including cellulose-degrading (10⁵ - 10⁶ CFU/g), phosphate-solubilizing (≈10⁵ CFU/g), and nitrogen-fixing microorganisms (10³ - 10⁴ CFU/g), although considerable spatial variability was observed. These findings reflect the biological characteristics of citrus-cultivated soils in the study area and provide a scientific basis for further research and sustainable soil management in citrus production systems.
Downloads
References
[1] Paterson, E., Gebbing, T., Abel, C., Sim, A., & Telfer, G. (2007). Rhizodeposition shapes rhizosphere microbial community structure in organic soil. New Phytologist, 173(3), 600–610. https://doi.org/10.1111/j.1469-8137.2006.01931.x
[2] Jangid, K., Williams, M. A., Franzluebbers, A. J., Schmidt, T. M., Coleman, D. C., & Whitman, W. B. (2011). Land-use history has a stronger impact on soil microbial community composition than aboveground vegetation and soil properties. Soil Biology and Biochemistry, 43(10), 2184–2193. https://doi.org/10.1016/j.soilbio.2011.06.022
[3] Xu, B., Wang, J., Wu, N., Wu, Y., & Shi, F. (2018). Seasonal and interannual dynamics of soil microbial biomass and available nitrogen. Biogeosciences, 15, 567–579. https://doi.org/10.5194/bg-15-567-2018
[4] Kaiser, C., et al. (2024). Impact of seasonality, moss cover, and forest types on soil microbial biomass and enzymatic activity. Catena, 244, 108269. https://doi.org/10.1016/j.catena.2024.108269
[5] Ngô, H. K., Nguyễn, H. C., Phùng, N. T., & Bùi, T. V. H. (2024). Studying microbial diversity in some soil samples typical agricultural cultivation and collection from the Dong Thap Muoi region. Science and Technology Journal of Agriculture & Rural Development, Issue 1 – July 2024, pp 61-69.
[6] Phan, Q. H., & Vũ, T. X. H. (2021). Study on microbial diversity in cultivating vegetable soil at Thai Binh province. Science and Technology Journal of Agriculture & Rural Development, Issue 1 – August 2021, pp 61-67.
[7] Tran, T. T. T., Dao, T. H., Pham, V. Q., Nguyen, X. H., & Ngo, D. T. (2023). Soil fertility and carbon sequestration as affected by vetiver grass (Vetiveria zizanioides L.) intercropped in citrus orchards in Cao Phong, Hoa Binh. Vietnam Soil Science, (71), 18-25.
[8] Phan, T. H. T., Nguyen, V. M. L., & Nguyen, V. H. (2016). Isolation of endophytic streptomycetes from Tuyen Quang orange trees and biological characteristics of Streptomyces angustmyceticus C12. Vietnam Journal of Agriculture and Rural Development, (2), 25-31.
[9] TCVN 9294:2012 (2012). Fertilizers – Determination of total organic carbon by Walkley – Black method. Ministry of Science and Technology.
[10] TCVN 7373:2004 (2004). Soils quality – Index values of total Nitrogen content in the soils of Vietnam. Ministry of Science and Technology.
[11] TCVN 8660:2011 (2011). Soil quality - Method for determination of total potasium. Ministry of Science and Technology.
[12] TCVN 7374:2004 (2004). Soils quality – Index values of total phosphorus content in the soils of Vietnam. Ministry of Science and Technology.
[13] TCVN 4048:2011 (2011). Soil quality - Determination of humidity and absolute dryness coeffcient. Ministry of Science and Technology.
[14] TCVN 4401–87 (1987). Cultivated soil - Determination of pHKCl. Ministry of Science and Technology.
[15] TCVN 4884-1:2015 (ISO 4833-1:2013) (2015). Microbiology of the food chain - Horizontal method for the enumeration of microorganisms - Part 1: Colony count at 30 degrees C by the pour plate technique. Ministry of Science and Technology.
[16] TCVN 6166:2002 (2002). Microbial nitrogen fixing fertilizer. Ministry of Science and Technology.
[17] TCVN 6167:1996 (1996). Phosphat-solubiling microbial fertilizer. Ministry of Science and Technology.
[18] TCVN 6168:2002 (2002). Microbial preparation for cellulose degradation. Ministry of Science and Technology.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
All articles published in SJTTU are licensed under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA) license. This means anyone is free to copy, transform, or redistribute articles for any lawful purpose in any medium, provided they give appropriate attribution to the original author(s) and SJTTU, link to the license, indicate if changes were made, and redistribute any derivative work under the same license.
Copyright on articles is retained by the respective author(s), without restrictions. A non-exclusive license is granted to SJTTU to publish the article and identify itself as its original publisher, along with the commercial right to include the article in a hardcopy issue for sale to libraries and individuals.
Although the conditions of the CC BY-SA license don't apply to authors (as the copyright holder of your article, you have no restrictions on your rights), by submitting to SJTTU, authors recognize the rights of readers, and must grant any third party the right to use their article to the extent provided by the license.
