The production of two strawberry cultivars achieved under different shading screens (covers) in protected environment was evaluated. The experiment was set up in galvanized steel closed greenhouse with semicircular ceiling covered with low-density polyethylene (LDPE) films 150 μm thickness, in the University of Passo Fundo, Rio Grande do Sul State, Brazil. The treatments consisted of a double factorial with two cultivars (Camarosa and Oso Grande) and four covers (control without screen and metalic, blue and red thermo-reflective screens with 40% shading) which were distributed in randomized blocks lining with three repetitions with 20 plants per plot in an useful area of 3m². The total and commercial number of fruits and the total and commercial fresh mass of deformed fruits per plant were determined. Also, the air temperature and the photossintetically active radiation (PAR) were monitored, being verified in two typical days (sunny and cloudy day). Considering the averages obtained under the absence and presence of screens and the total of the crops the production of the cvs. Oso Grande and Camarosa were similar. Under the blue screen these cultivars showed the lowest fresh mass.
Fragaria x ananassa Duch; Aluminet®; blue chromatiNet® and red chromatiNet®; number of fruits; competition of cultivars
