Crescimento e produção de cultivares de girassol ornamental irrigado com água de distintas salinidades.

Abstract

In the search for alternatives that make possible the use of waters with outlets in the various semi-arid regions, it is extremely important to know which crops are most adaptable to this situation. Therefore, the objective of this work is to evaluate the growth effects of two ornamental sunflower cultivars (Red and Vincente II) with water from different exits. The experiment was carried out in a randomized complete block design, 5x2 factorial scheme, with five salt levels (N1 = 0, N2 = 1.5, N3 = 2.7, N4 = 3.9, and N5 = 5.1 dS m-1) and two ornamental cut sunflower cultivars with four replications, two plants per plot, totaling 80 experimental units. It was verified that there was a significant effect on the interaction between the salinity of the irrigation water and the sunflower cultivars on such as TCAAP, FSH and FSR. As for TCRAP and FHVT, FSF, FSI, FSPA and FST variables, it is not a significant effect for the isolated factors, 1 and 5% for the F test. In addition, there was no effect of significance between the factors studied for other variables Studied. It was verified that with the increase of the electrical conduction of the water promoted reduction for all variables analyzed in isolation. A Sol Vermelho cultivar expressed better behavior for production variables. An electrical conductivity of irrigation water of 0.3 dS m-1 to 2.7 dS m-1 was conceptualized as recommended for cut ornamental sunflower cultivation.