Influência da metodologia do teste de germinação em areia nas sementes de Glycine max (L.) merril, A

Abstract

Germination can be influenced by different factors, including substrate and water content. Soybean seeds with low humidity, when in contact with water, may present damage by imbibition due to their rapid absorption, impairing their development. The present work aimed to test the influence of wetting the sand before and after sowing, and to test different field capacities for setting up the germination test. The treatments were: moistening the sand with 100%, 60% and 30% of the sand field capacity (CCA) before sowing; moisten the sand with 100%, 60% and 30% of CCA after sowing. Germination took place in an acclimatized room at 25°C with presence of light. The factors evaluated were: Vigor at first reading, germination, accelerated aging and emergence speed index. The treatments that showed the best results were to moisten the sand before planting with 30% and 60% of CCA. The amount of water used did not significantly influence seed performance, but the time to moisten the substrate did. When the substrate was moistened before planting, the sand was homogenized, preventing the accumulation of water in the layer where the seeds were sown. In the treatment in which the substrate was moistened after planting, water accumulated near the seeds, causing damage by imbibition and impairing germination. Observing the results, it is recommended to moisten and homogenize the substrate before planting with 30% or 60% of CCA.