Qualidade fisiológica de sementes de algodão das cultivares BRS Verde e CNPA 7H, submetidas a diferentes tratamentos pós-colheita.

Abstract

Cotton, considered the most important of the natural and artificial textile fibers, it is also one of the plants with the most complete utility and usage with varied uses, being located among the ten largest sources of wealth in agricultural section of Brazil. Before the importance of this plant the present work aims to study the variations in the physiologic qualities of seeds of the cotton-plant (Gossypium hirsutum L. r. latifolium, Hutch) being used a lot with colored fibers (green) and a non-colored lot (traditional white) varieties BRS green and CNPA 7H respectively on account of two humidity tenors (8 and 10%) and submitted to the storage in controlled atmosphere (dry chamber) placed in glass pots airtightly closed. On the same way, seeds of these same lots were stored with and without lint, unlinted and treated with fungicide, conditioned in permeable packings (paper bags) during a period of 12 months in lab atmosphere conditions. The following determinations were accomplished: germination standard test (GST) vigor (germination first count, seedling length, precocious aging and electric conductivity) humidity, oil tenor and protein. According to the results gotten, we can conclude that the humidity tenor of 10% represented in a better way the viability of the seeds under study. In reference to the seeds of the variety BRS Green, an increase of the germination and vigor was observed during the storage period. The seeds without lint (S/L) presented superior physiologic quality in relation to the ones with lint (C/L). The oil tenor of the seeds varieties BRS Green and CNPA 7H increased highly during the storage period, while the protein tenor decreased.