Influência de nanoparticulas de zinco e bioinoculantes na fitomassa e produção do pimentão sob déficit hídrico.

Abstract

Bell pepper (Capsicum annum L.) is among the ten most cultivated vegetables and of greatest economic importance in the Brazilian market. change in crop growth and development. Water scarcity is one of the factors that most limit crop growth and productivity. Water stress negatively affects physiological and biochemical processes in plants that restrict plant growth, development and productivity. The use of nanofertilizers and bioinoculants can be an alternative to reduce the use of chemical fertilizers in sweet pepper production, in addition to increasing the efficiency of soil biota due to the addition of beneficial microorganisms. Therefore, the objective of this work was to evaluate the influence of nanoparticles of zinc oxide (NPZnO) and zinc sulfate (ZnSO47H2O), associated or not with plant growth promoting bacteria (BPCP) as attenuator of water stress. The work was carried out at the Experimental Farm Rolando Henrique Rivas Castellón, at the Federal University of Campina Grande, in the municipality of São Domingos-PB, 30 km from the Pombal Campus, PB. The experimental design used was randomized blocks, in a split-plot scheme in space, where the plots comprised two levels of irrigation (100% and 50% of potential evapotranspiration -Eto) and the subplots comprised five treatments, composed of the combination of nanoparticles of zinc oxides, zinc sulfate and bioinoculants (Bio), composed of a mixture of the commercial product Biobaci® (Bacillus subtillis BV-09, containing 1.0 x 108 CFU/mL) and Nonema® (B. amyloliquefaciens, containing 1, 0 x 109 CFU/mL), these being (T1 = ZnSO47H2O via foliar, T2 = NPZnO via foliar, T3 = NPZnO via foliar + Bio, T4 = ZnSO47H2O via soil + Bio and C = Control), with 4 replications. The evaluated variables were the dry mass of leaves, stems and shoots, number of total fruits, commercial and not; and total production. The application of NPZnO via foliar, NPZnO via foliar + Bio it is ZnSO47H2O via soil + Bio, under a depth of 100% of ETo promoted greater gains in the accumulation of phytomass, production and productivity of bell pepper.