Telas de sombreamento e termo-refletores no desempenho produtivo de cultivares de alface no município de Uruçuí - PI

Abstract

One of the great difficulties of lettuce cultivation in tropical regions is high temperatures and light, these factors have a relevant influence on the development of the crop. Thus, the present work aimed to evaluate the performance of lettuce cultivars grown under different shade screens. The experimental design used was completely randomized, with three replications, with treatments arranged in a 2x6 factorial scheme, the first factor being the Grand lettuce cultivars Rapids TBR, and Itapuâ Super and the second factor, represented by the types of shading screens (white, gray, black, red and thermo-reflective screen shading), plus control (open field). The following evaluations were carried out: commercial fresh and dry mass of the aerial part, number of commercial leaves, diameter and length of the stem. Cultivation environments with shading screen and thermo-reflective provide better development of lettuce plants. The cultivar Grand Rapids produces a greater number of leaves than Itapuã, however, it has a longer stem length, an indication of early planting.