Crecimiento inicial de Cinchona officinalis L. bajo niveles de fertilización en condiciones de invernadero, cantón Loja
Knowledge of the fertilization of forest species results in higher productivity, savings, and lower environmental impacts in forest plantations; however, studies on fertilization and nutrition for native species during the growth stages are limited, as are the concentrations required for plant devel...
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| Format: | bachelorThesis |
| Jezik: | spa |
| Izdano: |
2024
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| Teme: | |
| Online dostop: | https://dspace.unl.edu.ec/jspui/handle/123456789/30505 |
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Označite | Izvleček: | Knowledge of the fertilization of forest species results in higher productivity, savings, and lower environmental impacts in forest plantations; however, studies on fertilization and nutrition for native species during the growth stages are limited, as are the concentrations required for plant development. In this context, the present research study had the following objectives: to evaluate the initial growth of Cinchona officinalis in response to different fertilizer doses and the genetic variability of three provenances (Uritusinga, Selva Alegre and Zamora Huayco). The test was composed of five treatments and four replicates arranged in a completely randomized design, with different doses of N (0, 40, 80, 120, 160 mg/dm3 ), P (0, 50, 100, 150, 200 mg/dm3 ), K (0, 40, 80, 120, 160 mg/dm3 ), and Cal (0, 20, 40, 60, 80 mg/dm3 ), and distributed in plastic containers filled with 20 dm3 of subsoil from areas surrounding the “La Angelia” experimental farm, arranged in the greenhouse of the plant micropropagation laboratory of the Universidad Nacional de Loja. The diameter at the base, height of the seedling, crown diameter, and number of leaves were evaluated fortnightly for 120 days after the installation of the experiment. The obtained data were subjected to variance analysis and subsequent regression analysis, with the equations adjusted according to the dose of each experiment. Of the elements studied, potassium and phosphorus were most important in expressing morphological traits, whereas nitrogen did not affect initial growth. Also, genetic variability between origins in forestry characteristics is recorded. Therefore, it is concluded that soil amendment with dolomitic lime and applying K0 and P150 fertilizers significantly favor the initial growth and seedlings quality of C. officinalis. |
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