Physiological parameters applied to the soybean seed storage techniques

Soybean (Glycine max (L.) Merrill) is originally from China, as the greatest Fabaceae economic importance in the world. Driven by the expansion of demand, particularly internationally, soybean began to expand more strongly in Brazil in the second half of the 70s. It began to be cultivated in Rio Grande do Sul, as a rotation option with wheat. The soybean producers sought to locate their production in higher regions, which usually occur mild temperatures. Some regions are less harsh than others, but in all these regions, the temperature and the moisture content during harvesting are challenges for the production of high quality seeds. In Brazil midwestern, it is common to find temperatures at harvest time, between 28 and 36°C, which, combined with the high moisture content of the seeds, enable the rapid development of fungi and the rapid reduction of seed quality. Seed germination is affected by environmental factors such as temperature and substrate, which can be manipulated in order to optimize the percentage, the rate and uniformity of germination, resulting in obtaining more vigorous seedlings and reducing production costs