OLIMPIO, E. F. V.; http://lattes.cnpq.br/7130762219299420; OLIMPIO, Evandro Fabricio de Vasconcelos.
Resumo:
Cotton farming in the Northeast region of Brazil has stood out as one of the most important
agricultural activities, due to the fact that its fiber has several applications in industry, but the
adverse conditions of the semi-arid region limit its growth and development. In this sense,
some management strategies can be used to attenuate the harmful effects of water stress on
cultures, such as the exogenous application of salicylic acid. In this context, the present work
aimed to evaluate the growth, phytomass accumulation and production of 'BRS Jade' cotton
cultivated under irrigation depths and foliar application of salicylic acid. The experiment was
carried out at the Agro-Food Science and Technology Center belonging to the Federal
University of Campina Grande, Pombal, Paraíba. A randomized block design was adopted, in
a 5 × 5 factorial arrangement, with five irrigation depths (40, 60, 80, 100 and 120% of Actual
Evapotranspiration) and five concentrations of salicylic acid (0, 1.5, 3 ,0, 4.5 and 6.0 mM)
with three replications, totaling 75 experimental units. The increase in irrigation depths
favored the growth, production and dry mass accumulation of 'BRS Jade' cotton at 130 days
after sowing. Salicylic acid does not attenuate the deleterious effects of water deficit on the
growth, production and dry matter accumulation of 'BRS Jade' cotton. Foliar application of
salicylic acid at a concentration of 3.0 mM associated with irrigation with 100% ETr
promotes an increase in cotton plant growth.