Respuesta agrofisiológica de la quinua (Chenopodium quinoa var. Tunkahuan) bajo diferentes niveles de fertilización nitrogenada en el sector La Argelia, Loja.
Quinoa is a crop of great agronomic and economic interest. Due to its high nutritional value and adaptability to adverse conditions, it is considered a potential crop to contribute to food security worldwide. Within crop management, nitrogen management is crucial because this is one of the nutrients...
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| Tác giả chính: | |
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| Định dạng: | bachelorThesis |
| Ngôn ngữ: | spa |
| Được phát hành: |
2024
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| Những chủ đề: | |
| Truy cập trực tuyến: | https://dspace.unl.edu.ec/jspui/handle/123456789/29122 |
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Thêm thẻ | Tóm tắt: | Quinoa is a crop of great agronomic and economic interest. Due to its high nutritional value and adaptability to adverse conditions, it is considered a potential crop to contribute to food security worldwide. Within crop management, nitrogen management is crucial because this is one of the nutrients with the highest demand, which can condition the growth, productivity and quality of the grain. At present, there is little information on the diagnosis of nitrogen nutrition in quinoa, information of vital importance to avoid deficiencies and excesses of the fertilizer. In this context, the present study aimed to evaluate the agrophysiological response of quinoa under different levels of nitrogen fertilization. A field experiment was established with a completely randomized design with 5 treatments: 0, 50, 100, 200 and 300 kg N ha-1 , each with 3 replications. Plant nitrogen concentration increased in the early stages of growth, and as biomass increased, nitrogen decreased due to dilution effect. A positive linear relationship was found between SPAD readings, plant nitrogen concentration and nitrogen nutrition index. On the other hand, nitrogen fertilization exhibited a clear effect on plant growth, significantly increasing biomass, plant height and leaf area at higher doses. Nitrogen also modified yield and its components; the dose of 100 kg ha-1 allowed reaching a maximum yield of 4 t ha-1 , in addition to an optimal partitioning of biomass towards grains with a harvest index of 0,5 and a better agronomic efficiency of nitrogen. Regarding grain quality, nitrogen had no significant effect on protein concentration. |
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