Evaluación de tratamientos pre germinativos usando diferentes sustratos sobre la germinación de tara (Caesalpinea spinosa (Mol.) Kuntz) bajo condiciones de campo y laboratorio
A large number of seeds of forest species do not germinate, they present a hard, impermeable testa covered with meshed cells; this is the case of the Caesalpinea spinosa commonly known as tara, which in order to achieve its germination, traditional methods are used to scarify the seeds, such as ligh...
में बचाया:
| मुख्य लेखक: | |
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| स्वरूप: | bachelorThesis |
| भाषा: | spa |
| प्रकाशित: |
2023
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| विषय: | |
| ऑनलाइन पहुंच: | https://dspace.unl.edu.ec/jspui/handle/123456789/27397 |
| टैग: |
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टैग जोड़ें | सारांश: | A large number of seeds of forest species do not germinate, they present a hard, impermeable testa covered with meshed cells; this is the case of the Caesalpinea spinosa commonly known as tara, which in order to achieve its germination, traditional methods are used to scarify the seeds, such as light scraping, which on some occasions does not achieve the objective; to this is added that sometimes the seed germinates, but when it is placed in a substrate its growth is not achieved. In this research, the effect of mechanical, physical and chemical pre-germination treatments on tara (Caesalpinia spinosa) seed germination and the influence of substrates on the initial growth of seedlings are studied. According to the methodology, an analysis of viability (%), purity (%), weight (g), and moisture content (%) was carried out in the first instance. of the seed applying the ISTA 2020 Standards (International Seed Analysis Association). In addition, 4 pre-germination methods were applied at the laboratory level, these were scarification: mechanical (sanding-cautery), chemical (sulfuric acid), physical (immersion in water) and control, each one under different concentrations of gibberellins 1 000 ppm (Gb), 1 500 ppm (Gm), 2 000 ppm (Ga) 0 ppm (G0). The purity percentage results were high with a value of 91.7%. Regarding the weight of the 1000 seeds, an average value of 283 g was obtained. The moisture content of the seeds was 7.95 %, with which it was possible to conclude that the seeds are orthodox type. The pre-germination treatment with the highest percentage of germination was mechanical scarification-sanding with 78.33% (E2Gb) and the treatment (E1Gb), with 76.67% when applying 1000 ppm of gibberellins. Finally, the best substrate and pre-germination process obtained in the investigation was the combination of substrates, forest soil + sand + humus + Sanding with which a better yield was obtained in the seedling, in terms of its growth, obtaining an average height of 10.56cm; Regarding leaf growth, there was an average of 7.7 leaves at 73 after sowing. We can recommend the implementation to break the dormancy of the tara seed the mechanical pre-germination treatments of sanding and cauterizing, for its rapid development the use of the combination of the substrate of forest soil + sand + humus. Keywords: scarification, tare, pre-germination treatments, substrate. |
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