Fertirrigação nitrogenada na produção da alface

Abstract

Lettuce most consumed vegetable in world and Brazil, being used salads and sandwiches, mainly fastfoods, constituting itself vitamins, fibers and mineral salts. The objective of this work is to evaluate the yield of lettuce (Lactuca sativa L.) against nitrogen doses applied via fertirrigation in an unprotected environment, in the city of Doutor Camargo, in the northwest region of the state of Paraná (23°35'44.11''S). The 1 Centro Universitário de Maringá – UNICESUMAR, Maringá – PR. giovanemunhoz2008@hotmail.com 2 Centro Universitário de Maringá – UNICESUMAR, Maringá – PR. joaoovitor_fernandes@yahoo.com Centro Universitário de Maringá – UNICESUMAR, Maringá – PR. andre.costa@unicesumar.edu.br experimental design was a completely randomized design (DIC), with seven treatments and six replicates: T1 control - 00 kg ha-1 of nitrogen application; T2 - a 3 L ha-1 Fortune application; T3 - two applications of 3 L ha-1 from Fortune; T4 - application of 100 kg ha-1 of urea; T5 - application of 120 kg ha-1 of urea; T6 - a 5 L ha-1 application of NTOP; T7 - two applications of 5 L ha-1 of NTOP. The application of the nutrients to the culture was carried out via fertirrigation using plastic tubes, and applied to the 15 and 30 days after the transplant to the plat. The fresh mass of the aerial part (weight), stem diameter, root length and yield were analyzed. In general, the study showed that the use of nitrogen fertilization by fertirrigation provided, for most of the treatments applied, in the American and Curly cultivars, an increase in the fresh mass of the aerial part (weight), stem diameter, root length and productivity