Potencial germinativo de sementes de arroz sob tratamentos de sementes e períodos de armazenamento

Abstract

Through seed treatment it is possible to assist the plant in its germ process, protecting it from pests, diseases, and invasive plants. However, prolonged periods of seed storage already treated may influence the germ process and behavior of seedlings after emergency. The purpose of this work is to evaluate the performance of the associated seed treatment at different periods of rice storage. The methodology consisted of a factorial experiment, 8 x 3, with 8 seed treatments for 3 storage periods, with 4 repetitions. The experimental treatments used in the process boil down to: T1 – Solseed, T2 – Permit star, T3 – Cruiser, T4 – Solseed + Permit Star, T5 - Cruiser + Permit Star, T6 - Cruiser + Permit Star + Solseed, T7 - Solseed + cruiser, T8 – Untreated. The samples contained fifty seeds, which were packed in Germestest, moistened with distilled water, and maintained for 14 days, at a temperature of 25ºC, with a moisture of 80%. The analysis periods after storage were 0, 15 and 30 days. The first germination count , germination , root length, and aerial part is evaluated. The T6 caused a reduction in the first germination count when stored 15 and 30 days. The T4, stored at 15 days, reduced first germination count, not differing from 30 days. The T-5 15 days of storage reduced germination compared to times 0 and 30 days. Considering the time 30 days, the isolated Solseed presented greater germination compared to Solseed + Cruiser and witness. The storage of seeds treated for periods near 15 days promoted increment in the and aerial part (T4 and T7), the storage of the seeds treated, for a period of 30 days increased the root length.