Utilização de agrominerais no recobrimento de sementes de feijão miúdo

Abstract

The current work set out to evaluate the germination and early performance of cowpea plants (Vigna unguiculata (L.) Walp.) through the use of seeds covered in agrominerals. The seeds were covered in itafós natural phosphate, gabbro and a mixture of both agrominerals in quantities equivalent to 5, 10, 15, 20, and 25g/100g of seeds. Polyvinyl acetate (PVA) was utilized as adhesive. The germination of the treated seeds was determined in laboratory following the protocol of the International Rules for Seed Testing for the cultivation of cowpea. The field experiment was carried out under experimental design in randomized blocks, with four repetitions whose variables were: the emergence of seedlings at the 5th, 8th and 17th day after seeding; plant height at the 17th, 24th, 30th, 38th, 45th, 54th and 66th day after seeding; number of leaves per bough; dry mass of leaves and boughs and dry mass total. The treatment did not affect the seeds germination. The agrominerals gabbro and the mixture of itafós natural phosphate and gabbro surpassed the control treatment in the number of leaves as well as in overall dry mass.