Manejo da adubação nitrogenada nas culturas de alface, repolho e salsa

Abstract

The adequate supply of nitrogen is one of the key management factors that affect the yield and quality of vegetables produced. This study aimed to evaluate the effects of nitrogen application rates and sources on the development and productivity of lettuce, cabbage and parsley. The experiments were conducted at the State University of Goiás, Campus Ipameri in the period from August to November 2014. The experimental design for each species was the randomized blocks in factorial 2 x 5, two N sources (conventional urea and coated urea polymer) and five doses of nitrogen (according requirement of each species) with four replications. The species used were crinkly lettuce Itapuã Super cabbage Chato de Quintal and salsa Portuguese big shots. N doses were divided in three equal applications, cover, and for the lettuce were applied 0, 60, 120, 180 and 240 kg ha-1 N; for cabbage 0, 75, 150, 225 and 300 kg ha-1 N and parsley 0, 40, 80, 120 and 160 kg ha-1 N. Nitrogen rates do not influence the productive characteristics of lettuce, cabbage and saved.