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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 índice 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 ºC e, para que completasse todo o seu ciclo fenológico, foram necessários 2,155 GDA. A área foliar e o índice 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 ºC, 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

Cultivo do pimentão em condições protegidas sob diferentes doses de nitrogênio via fertirrigação