TROCAS GASOSAS, CRESCIMENTO E PRODUTIVIDADE DE FEIJOEIRO COMUM COM APLICAÇÃO DE PROTETOR SOLAR

Abstract

The common bean stands out in the grain yield in Brazil, so the choice of cultivars adapted becomes especially important. This study aimed to evaluate the effect of applying commercial sunscreen and shading on cultivars of irrigated beans in the Cerrado (Brazilian Savannah). Two cultivars (BRS MG Realce and BRS FC 104) were cultivated with and without sunscreen application variables and in pots in shaded environments (50% e 70%) under full sun and with drip irrigation, being analyzed liquid photosynthesis, sweating, growth, and yield variables were analyzed and in the field with central pivot irrigation, growth, and yield variables were analyzed, with application to 33 DAE and 47 DAE. Liquid photosynthesis and sweating were influenced by the sunscreen application only at 33rd day after emergency. The environments have influenced photosynthesis and sweating at 47th day after emergency. The growth and yield variables of the BRS Fc104 cultivar were not affected by the sunscreen application but they were superior in shaded environments than in full sun. The leaf protector application has influenced only the number of branches in the BRS MG Realce and BRS Fc 104 cultivars in field crops. The genetic factor among cultivars was evident in field crop, emphasizing that the use of sunscreen in beans cultivated by irrigation has not influenced yield.