Use of native pine species to recover degraded areas and increase their resilience in the Cointzio micro-watershed of the Municipality of Morelia Michoacán, Mexico

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Gabriela Rosas León , María Elena Granados García, Manuel Gutiérrez Castillo , Juan Carlos González Cortés

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In the Cointzio micro-basin, the loss of forest cover has caused soil erosion, and silting of the Cointzio dam. The vegetation of the micro-basin favors water infiltration, which provides an important input of water to the city of Morelia. Thus, it is essential to carry out soil recovery actions through the introduction of native species. The objective of the work was to evaluate the development of different pine species introduced in degraded areas, to avoid soil loss and to afford the ecosystem resilience. In the community of El Escobal, the introduction of 250 one-year-old plants of P. pseudostrobus, P. oaxacana and P. patula was carried out by random planting in an area of gullies of 40 X 40 m. and one with secondary vegetation of 40 X 40 m. To relate the growth and survival of the seedlings, microclimate features were determined. After eight months, the survival was 54%, being taller in the secondary vegetation (73%) and lower in gullies (27%). Height growth was higher in the gullies area and lower in the secondary vegetation area without significant differences, diameter growth was higher in secondary vegetation and lower in gullies with significant differences. Features of soil indicated differences in pH, organic material, soil moisture and, differences between nutrients phosphorous, calcium and magnesium concentrations. The difference in photosynthetically active radiation was consistent with the orientation and with the presence of plant cover of each area. Our results suggest the best species to recover degraded areas in this ecosystems, was P. pseudostrobus.

Resource Type:
Conference Presentation, SER2021

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