Physical and Chemical Soil Properties of Mangrove Forests in Vietnam

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https://doi.org/10.37482/0536-1036-2021-5-9-21

Abstract

Recently the area of mangrove (evergreen) forests growing along the coast of Vietnam has been significantly increased by artificial afforestation under the recognition of their ecological role and economic importance. Protection mangrove forests are the largest among all mangrove forests in Vietnam. They act as a belt to prevent coastal roads from erosion and damage due to tides, storms, and tsunamis. However, their role in coastal soil formation is still poorly studied. Soil formation in mangrove forests is influenced by many factors including the following: woody vegetation, tidal saltwater, precipitation, and mountain runoff. The ability of soil to retain water, nutrients, ions, and some other physical and chemical properties is closely related to the soil texture. Long-term monitoring of the soil texture and the content of nutrients in the soil of mangrove forests in the Dam Bay area of the Nha Trang Bay allowed us to distinguish 2 groups of soil phases: typical laterite soil in natural mangrove forests and in rhizophore plantings of 2004 and poorly developed laterite soil in cultural cenoses of 2007 and 2013 and in the littoral zone. These two groups have differences in the soil texture depending on the time of stand formation. The total amount of gravel, aleurite, and silt in the first group of soils is higher than that in the second group. The concentrations of nutrients (phosphorus and nitrogen content) in the soil of mangrove forests is quite high, though it gradually decreases from the soil of natural mangrove forests to the littoral zone. In order to effectively prevent erosion of soils and improve their physical and chemical properties, artificial mangrove forests should continuously be grown along the coast lines of the Nha Trang Bay in the Khanh Hoa province, Vietnam.

Authors

Phan Trong Huan¹, Candidate of Agriculture; ResearcherID: ABA-6501-2020, ORCID: https://orcid.org/0000-0002-0471-0443
Vasiliy F. Kovyazin², Doctor of Biology, Prof.; ResearcherID: Y-5917-2018, ORCID: https://orcid.org/0000-0002-3118-8515
Sofya S. Zvonareva³, Candidate of Biology; ResearcherID: E-8159-2019, ORCID: https://orcid.org/0000-0002-0372-9919
Nguyen Thi Hai Thanh¹, Junior Research Scientist; ResearcherID: AAX-4866-2021, ORCID: https://orcid.org/0000-0001-7716-6859
Nguyen Thi Lan¹, Candidate of Biology; ResearcherID: ABA-6990-2020, ORCID: https://orcid.org/0000-0001-5869-3936

Affiliation

¹Russian-Vietnamese Tropical Research and Technology Center, Coastal Branch, Department of Ecology, Nguyen Thien Thuat st., 30, Nha Trang, Khanh Hoa Province, 57127, Socialist Republic of Vietnam; e-mail: tronghuan1369@yahoo.com
²Saint Petersburg Mining University, Vasilyevsky Ostrov, 21 liniya, 2, Saint Petersburg, 199106, Russian Federation; e-mail: vfkedr@mail.ru
³A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninskiy prosp., 33, Moscow, 119071, Russian Federation

Keywords

Nha trang Bay, soils of mangrove forests, soil texture, content of nutrients, rhizophore planting

For citation

Phan T.H., Kovyazin V.F., Zvonareva S.S., Nguyen T.H.T., Nguyen T.L. Physical and Chemical Soil Properties of Mangrove Forests in Vietnam. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 5, pp. 9–21. DOI: 10.37482/0536-1036-2021-5-9-21

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