agrotecnologia

Abstrato

Response of Bell Pepper Crop Fertigated with Nitrogen and Potassium Doses in Protected Environment

Marcelo Zolin Lorenzoni*, Roberto Rezende, Álvaro Henrique Cândido De Souza, Cássio De Castro Seron, Tiago Luan Hachmann and Paulo Sérgio Lourenço De Freitas

Bell pepper is among the ten most economically important vegetables in the country. The proper management of water and fertilizers coupled with protected environment allows to obtain a quality agricultural production. This study aimed to evaluate the response of nitrogen and potassium doses applied through fertigation on the growth and yield of bell pepper crop, Magali R hybrid. A completely randomized design was used, with 16 treatments in a factorial scheme 4×4, with four replications. The treatments resulted from the combination of four doses of nitrogen (0; 73.4; 146.8 and 293.6 kg ha^-1) and potassium (0, 53.3; 106.7 and 213.4 kg ha^-1). The experimental plot consisted of a 25 L pot with a bell pepper plant. Seven harvests were made throughout the experiment, and fresh fruit number and mass were evaluated. Leaf area (LA) and total matter accumulation were evaluated as growth components. Regardless of the applied potassium doses, the variables LA and total dry matter showed higher results for N ranging from 155 to 194 kg ha^-1. The maximum fresh fruit matter (FFM) (1882 g plant^-1) occurred at the dose of 155 kg N ha^-1 and 106.7 kg K ha^-1 and the maximum number of fruits (NF) (16.3 fruits plant^-1) was obtained at the dose of 147 kg N ha^-1 and 106.7 kg K ha^-1.