Chromatographic and Microbiological Characterization of Soil Samples from Plots in the Central Commune of Alangasí Village
Authors
-
Álvaro P. Gavilanes
Universidad de las Fuerzas Armadas(ESPE), Ecuador. Centro de Investigaciones y aplicaciones militares (CIAM)
https://orcid.org/0000-0002-0647-9097
DOI:
https://doi.org/10.70099/BJ/2025.02.01.17Keywords:
soil, forest fire, bacteria, organic matter, chromatography, phosphorus, glucose, cangahua, soil quality, microbial diversityAbstract
Soil is a vital ecosystem for the survival of all species on the planet. This resource is at risk due to erosive processes caused by natural factors and intensified by anthropogenic activities. This study evaluated land quality affected and unaffected by forest fires in the Central Commune of Alangasí Village. Five plots (197, 200, 205, 274, and 274B) were assessed through qualitative (Pfeiffer chromatography) and quantitative (LOI gravimetric method) tests. Preliminary characterization of bacteria from these areas and complementary measurements of phosphorus and glucose levels were conducted. The results showed that plot 205 (unaffected) had the best soil quality, while plot 197 (affected by fire) exhibited slight recovery. In contrast, plot 200 (cangahua-type soil) presented the poorest condition. Additionally, a predominance of Gram-positive bacteria was found, especially in plots affected by fire (197) and those with higher cangahua content (200). Total phosphorus accumulation and a strong correlation between glucose levels and bacterial growth were observed in the burned plot. The study concluded that vegetation cover, nutrient content, and physicochemical conditions significantly influence soil health.
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