Emergência de plântulas em diferentes substratos e profundidades de semeadura: nova metodologia na avaliação do vigor em sementes de milheto

Abstract

The Forage Crops is the science that cares and is sowing forage feed. Among the many produced tropical forages, one of the most used in Rio Grande do Sul, this millet. Among the characteristics of the culture, It called attention to its high resistance to drought and capacity of regrowth, consequently dry matter production. One of the biggest problems that involve the formation of pastures is the change in quality of forage seeds in the marketplace, resulting in poor quality seeds. The objective of the work,is to establish methodologies to assess accurately the quality of different batches of millet seeds. The work was conducted in the Teaching of LDAS Seed Analysis Laboratory at the Faculty of Agronomy "Eliseu Maciel" (FAEM), Universidade Federal de Pelotas. Five batches of millet seeds were used. For assessing the quality of the millet seed physiological quality tests were used as: thousand seed weight, germination, first count of germination, accelerated aging, seedling emergence, germination speed index, seedling length, dry matter and seedling emergence on different substrates. Post-emergence was evaluated emergency speed index, total length of the seedling, dry mass matter of seedlings and leaf number. For other tests, we used a completely randomized design with four replications. The test results were compared by the Scott -Knott test at 5 % probability. The innovative methodology of force test is promising to evaluate the quality of pearl millet seeds. The substrate most suitable to layer lots of millet seeds as the force is sand and carbonized rice husk with 1.0 cm deep. The test methodology is correlated with the existing emergency speed index tests and emergency field.