Com o objetivo de avaliar o efeito de doses de nitrogênio aplicadas via fertirrigação sobre o rendimento do pimentão
cultivado em ambiente protegido, conduziu-se este trabalho no Centro de Ciências Agrárias-UFPB, consistindo de cinco
tratamentos (0, 100, 200, 300 e 400 kg ha-1 de N) e 4 repetições. Avaliou-se o rendimento de frutos total, comercial e
não-comercial e se determinou a relação entre a área foliar (AF) e o Ãndice de área foliar (IAF) com o rendimento. Todas
as doses de nitrogênio influenciaram, linear e positivamente, os rendimentos de frutos total e comercial e, de forma
quadrática, o rendimento de frutos não-comercial. A acumulação térmica do pimentão para se atingir a fase de maior
rendimento foi de 1,668 °C e, para que completasse todo o seu ciclo fenológico, foram necessários 2,155 GDA. A área
foliar e o Ãndice de área foliar afetaram o rendimento total de frutos do pimentão, de forma linear.
Aiming to evaluate the effect of doses of nitrogen applied via fertirrigation on the yield of bell pepper cultivated in
greenhouse, this work was conducted at the Center of Agrarian Sciences – UFPB. The experiment consisted of five
treatments (0, 100, 200, 300 and 400 kg ha-1 of N) and 4 repetitions. Total, commercial and non-commercial fruit yields
were evaluated, and the relationship between the leaf area and the leaf area index with the yields were determined. The
doses of nitrogen influenced linearly and positively the total (commercial plus non-commercial fruits) and for the
commercial yield of fruits, and for non-commercial fruits of the bell pepper a quadratic function was observed. The
thermal accumulation of the bell pepper to reach the phase of larger yield was of 1.668 °C, and to complete its whole
phenologic cycle, 2.155 GDA were necessary. The leaf area and the leaf area index affected the total yield of fruits of
bell pepper, in a linear and positive way. The leaf area index showed itself to be satisfactory for the conditions of this
experiment, demonstrating that the density of the plants used was adequate.
