Interação entre colheita, beneficiamento e armazenamento na qualidade das sementes de algodão herbáceo (Gossypium hirsutum L.)

Abstract

The objective of this work was to evaluate the physiological quality behavior of the herbáceous cotton seeds (Gossypium hirsutum r. latifolium, HUTCH) stored over 12 months and subjected to different harvesting procedures, preparatíon and conservation conditions. The experimental delimitation adopted was the entirely casual, in a factorial scheme 3 X 4 X 2 X 5 with two repeats, being represented by the following combination of factors: harvesting times (6:00-6:30 hs) without drying; 6:00-6:30 hs with drying and 9:00-9:30 hs without drying ); treatment speeds (400, 550 and 700 rprn, with blade de-seeder and 350 rpm with roller deseeder ); conservation conditions (laboratory environmental conditions in Campina Grande, PB and dry chamber set at 10C and 35% relative hurnidity) and five storage periods (0, 3, 6, 9 and 12 months) - The strain used was the CNPA Acala 1, which was submitted to an analysis of germination and vigor and determined the weight of 100 seeds the hurnidity value for each type of crop, treatment velocity, storage conditions and storage period. For best preservation of the seeds physiological state, it is concluded that the harvesting of cotton seeds should be done between 6:00-6:30 hs with drying; that a blade de-seeder with speeds up to 550 rpm should be used, and that the seeds should be stored in temperature and hurnidity controlled conditions.