Doses de polímero hidroretentor no algodão BRS Topázio

Abstract

The cultivation of colored fiber cotton is done mainly by small producers in the states of Pernambuco, Bahia, Paraíba and Rio Grande do Norte. New technologies to help tolerate long periods of drought and development of new drought tolerant cultivars, economically viable techniques that promote increased productivity and reduce losses in the agricultural sector should be priorities around the world. The use of hydro-retaining polymers is one of the most recent technologies used for water supply and maintenance of plants. The objective of this study was to evaluate the response of BRS topaz to the use of different doses of water-repellent polymer. The experiment was carried out in greenhouse from October 2018 to February 2019 at UFRPE / UAST, PE. The statistical design was a completely randomized design with 5 doses of hydro-polymer (0, 30, 60, 90 and 120 g pot-1) and 4 replicates. Plant height, stem diameter, leaf area per plant, internodes length, number of nodes, dry mass of the plant, root dry mass and total dry mass, number of apples per plant, number of beaks per plant, production of beetles per plant, production of seed per plant and production of fiber per plant. The increase in the value of the hydrogel doses resulted in an increase in the values of emergence speed index, plant height, stem diameter, internode length, leaf area and number of apples, the dose being 120 g pot-1, which provided better values for these variables in the BRS Topázio greenhouse.