Recobrimento de sementes de arroz com agrominerais

Abstract

Rice (Oryza sativa L.) is one of the most cultivated cereals, especially in Asia where it concentrates 90% of world production and consumption of rice. The seed quality is determined by physical, genetic, physiological and health. The objective was to evaluate the rice seed storage behavior and the use of rock in the post seed coating. The work was conducted at the Federal University of Pelotas in the agricultural year 2013/2014. The seeds were coated with two rock powders being one granodiorite rock and basalt in the untreated seeds and the doses, 7.5%, 15% and 30% of rock dust, and stored for twelve months. Every two months were performed by standard germination, first count of germination, accelerated aging, cold test, root length, shoot length and water content. In October, crop sowing period was evaluated emergence test in sand, emergency speed index and seedling dry. It can be observed that the coating of seeds with rock powders showed higher germination, improved performance in the cold test, increased shoot length and reduction in moisture content of the seeds. The coating also provided higher speed of emergence index and seedling dry over the untreated seeds.