Evaluación de la relación entre las propiedades físicas y químicas de la madera en Salix humboldtiana Willd,árbol patrimonial de la ciudad de Loja

Urban trees are an essential part of a city's landscape, offering a variety of benefits, including the following: environmental, aesthetic, landscape, recreational, social, and economic, which are used in a variety of capacities by the public. Salix humboldtiana Willd. is present in the urban trees of the city of Loja and is mainly used for soil protection due to its ability to exert mechanical functions to combat soil erosion by water and wind. A study of the physicochemical properties of Salix humboldtiana wood was conducted in order to determine the correlation between those properties and the chemical characteristics of the soil where the wood was cultivated. To determine the physical properties, once the branches of five selected Salix humboldtiana trees were extracted, three specimens of 10 cm x 2.5 cm were obtained for each individual, and moisture content, green density, equilibrium density, anhydrous density, basic density and volumetric shrinkage were obtained. The chemical analysis of the wood was carried out using the TAPPI methodology; five Salix humboldtiana trees were selected from the urban woodland of the city of Loja, from which a branch was obtained, and the sawdust powder was extracted from each individual, and with the same to determine the percentage of extractives, ash, lignin and holocellulose present, making three repetitions of each individual. Each tree's soil properties were determined by collecting a soil sample from the soil, processing the sample and determining the pH, nitrogen, phosphorus, potassium, and available organic matter. The statistical analysis included Spearman correlation tests and Kruskal Wallis nonparametric tests. Physical properties include an average moisture content of 42.91 percent and a volumetric shrinkage of 12.12 percent. Having examined the chemical composition of the wood, ash, extractive, lignin, and holocellulose were included, resulting in a 100% percentage 5 when these four components are added together, with holocellulose and lignin being the most abundant components in the Salix humboldtiana Willd wood. As a result of the chemical composition of the soil where the species grow are slightly acid soils (6.12); with a high level of phosphorus, it also shows an average nitrogen content and a high average value in organized matter. There are two negative correlations between the chemical properties of the soil and the chemical components of the wood, between pH value and lignin content -0.56 (Sig. = 0.02), and in terms of nitrogen (N) available in the soil and holocellulose with a coefficient of -0.71 (Sig. = 0.002), in the correlation between the chemical properties of the soil and the physical properties of the wood, it was observed that there is a negative relationship between nitrogen and moisture content -0.62 (Sig. = 0.01).

• Egile nagusia: Carpio Vega, Briggette Melania (author)
• Formatua: bachelorThesis
• Hizkuntza: spa
• Argitaratua: 2024
• Gaiak: COMPOSICION QUIMICA; MADERA; PROPIEDADES FISICAS
• Sarrera elektronikoa: https://dspace.unl.edu.ec/jspui/handle/123456789/29291