Germinação de sementes de trigo mourisco expostas a diferentes temperaturas

Abstract

Buckwheat has an enormous capacity for dry matter production in the soil, and it also has the ability to withstand soils that are poor in fertility. It produces gluten-free flour, which is a great market factor for it. As for the Missões region of the state of Rio Grande do Sul, Brazil, there is no specific sowing time recommended in the Climatic Risk Zoning application, nor has the buckwheat crop been registered. There is no ideal time for sowing the crop, which can change its productivity in relation to its yield factors. Thus, the study aimed to analyze physiological factors in seed germination at different temperatures. The experiment was bifactorial, two cultivars (IPR 91, IPR 92) x 5 germination temperatures (15°C, 20°C, 25°C, 30°C, 35°C). The following variables were evaluated: germination; shoot length; radicle length and IVG. Tests were carried out with a paper roll with 50 seeds each with 4 replicates for each temperature. Finally, it resulted that the best temperature for germination was 22.4°C for IPR 91 and 24°C for IPR 92. For shoot length it was 25.8°C for both cultivars, in the root length variable it had better results at 22.5°C for IPR 91 and 23.7°C for IPR 92. For IVG it was 25.4°C for IPR 91 and 28°C for IPR 92.