Estudo biométrico de pitayas no semiárido: impactos da salinidade e da incidência solar

Abstract

Pitaya (Hylocereus spp.), a plant from the cacti family, is exotic and highly adapted to the semi-arid region. However, knowing the factors that can limit its development contributes to the development of cultivation techniques that provide greater productive returns. In this context, the objective was to biometrically analyze pitaya plants subjected to different levels of salt and shading. The experiment was conducted in a completely randomized experimental design, in a 2x5 factorial scheme, with electrical conductivity of 0 addition of salt (T0), 2.5 dS m-1 (T1), 5 dS m-1 (T2), 7.5 dS m-1 (T3) and 10 dS m-1 (T4), in environments: shaded – 50% (A1) and full sun (A2), with 4 replications, totaling 40 installments. The variables analyzed were: number of cladodes (NC), sum of cladode length (SCC), average cladode diameter (DMC) and rib diameter (DCOS). The shaded environment provided a greater number of cladodes at an electrical conductivity of 5 dS m-1 than the full sun environment. The rib diameter was greater in full sun than those that were shaded up to salinity 7.5 dS m-1 and the coefficient of variation was greater between the number of cladodes and average cladode diameter than the other variables.