AVALIAÇÃO DA EFICIÊNCIA DE BIORREGULADOR EM SEMENTE DE MILHO (Zea mays) EM FUNÇÃO DO TEMPO DE ARMAZENAGEM

Abstract

Seed treatment for grain productíon is a process that comes before planting and is extremely important for crop development, from germination to its fínal phase, vvhich aims to protect the seed from pests and diseases and to stimulate its development. So, it's perfonned the treatment wíth insecticides, fimgicides and products that collaborate in a better hormonal composítion for a good germination and better development of roots and aerial parts. Therefore, the síudy aimed ío evaluate the efficiency of corn seed treatmení vvith the I bioregulator, composed of [kinetin (0.09gL-l), gibberellic acid (COSOgL-l) and 4-índole-3- acid. lUbutyric (0.050gL-l)] due to the storage time. The experiment was directed in vases with 6 treatments and 4 replications using a completely randomized design (DIC) method. Tl - was applied on the same day, T2- one day storage, T3- two days storage, T4- three days storage, T5-four days storage, T6-fíve days storage. The treatment was performed with 10 ml of the product per kilo of seed, as recommended by the manufacturer. The evaluations were performed at 7, 14, 21, 28 days after emergence, in which the number of emerged plants and plant size were analyzed and, at last, at approximately 30 days, the size and weight of root and shoot were evaíuated. The resuhs of the present work indicate that there was no significant difference in plant size due to storage. However, the com seeds that weren't submitted to storage (Tl ) and those stored one day after application of the product (T2), obtained the largest root sizes varying between 10L75 and 97.75 cm, respectively,