Efecto de la fertilización nitrogenada y la modificación de la radiación solar, sobre el crecimiento y rendimiento de la Quinua en la Argelia, Loja
Quinoa is a crop of great importance since in recent years it has expanded worldwide, thanks to its high nutritional value and adaptability. In Ecuador it is grown in the Sierra region with yields that do not exceed 0,70 t/ha, and the yield of this crop can be affected by various abiotic and biotic...
שמור ב:
| מחבר ראשי: | |
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| פורמט: | bachelorThesis |
| שפה: | spa |
| יצא לאור: |
2022
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| נושאים: | |
| גישה מקוונת: | https://dspace.unl.edu.ec/jspui/handle/123456789/25970 |
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הוספת תג | סיכום: | Quinoa is a crop of great importance since in recent years it has expanded worldwide, thanks to its high nutritional value and adaptability. In Ecuador it is grown in the Sierra region with yields that do not exceed 0,70 t/ha, and the yield of this crop can be affected by various abiotic and biotic factors. Knowing the phenological stage that is most susceptible (known as the critical period) to stress factors (shading) is fundamental to optimize agronomic management of the crop. The objective of this research was to determine the effect of nitrogen fertilization and the modification of incident solar radiation on growth and yield in quinoa at different phenological stages. The trial was established at the Experimental Teaching Farm "La Argelia" located in the city of Loja, using a completely randomized experimental design with a bifactorial arrangement with 8 treatments and 3 replications consisting of 3 successive periods of shading (80%) with a duration of 15 days, plus a control without shading, combined with nitrogen application in two doses (0 and 150 kg/ha) with the purpose of modifying the relationship: source -destination. Phenology, plant height, stem elongation rate and aerial biomass were evaluated. Yield and its components were evaluated at harvest: number of grains, grain weight, biomass and harvest index. No significant effects of shading and nitrogen on growth and production variables were found. However, greater growth (plant cover and biomass area) was observed in plants with the highest dose of nitrogen, independent of the time of shading. The biomass area of the plants decreased when they were shaded at the beginning of grain filling, likewise, a drop in the weight of 1000 grains was observed when shaded at the same stage, however, this was more noticeable only in the plants that received nitrogen. The results suggest that one of the most sensitive stages to the decrease in resources (solar radiation and nitrogen) is the beginning of grain filling, which can affect yield by reducing the number of grains in the quinoa crop, and this effect was seen mostly in plants that did not have nitrogen fertilization. The yield with shading plus nitrogen fertilization reached 4,19 t/ha. Keywords: Quinoa, yield components, shading, nitrogen. |
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