Substratos e metodologia alternativa para o teste de germinação em sementes de soja tratadas quimicamente

Abstract

The aim of this research is to analyse alternative substrates and methodology in soybean seeds treated with agrochemicals to promote germination test. Soybean seeds from 2014/2015 harvest season with germination equal or more than 95% and water balance in average of 12.5% were submitted to three chemical treatments (crusier® 350 fs, maxim xl and avicta complete) according to the recommended dosage to this culture. Treatments consisted in a combination of between two types of seeds in each roll (25 or 50) and four substrates (germitest; germitest + sand; germitest + vermiculita and germitest paper with pre hidrated seeds). In a subsequent phase, tests to measure the potential of seeds’ germination regarding treatments and substrates were implemented. Based on these tests, the best choice of appropriate substrate depends on the type of the product and the active ingredient of seeds’ treatment. Pre hydrated seeds can be a valuable option to germination tests in comparison to the standard seeds in intention to commercialization. Finds showed the amount of 25 seeds in each repetition is indicated to conduct the germination test treated soybean. Homogenous and rapidly development of seedlings have been achieved by using a constant temperature of 25°C during tests.