IMPACTO DA ADUBAÇÃO NITROGENADA NA CULTURA DO TOMATE (Solanum lycopersicum)

Abstract

The tomato crop is very demanding in nitrogen (N) and the tomato nutritional periodic evaluation can help in the nitrogen fertilization management. Thus, this work aimed to evaluate the effect of nitrogen doses on the initial growth of Sweet Grape tomato. The experiment was carried out under greenhouse conditions, in the agricultural year 2020/21, at the Instituto Federal Goiano - Campus Cristalina, located in the municipality of Cristalina-GO. A randomized block design with four replications, five treatments consisting of doses of N (0, 75, 150, 225 and 300 kg of N ha-1) was used. Seeding was carried out in polystyrene trays with 200 cells. performed when the seedlings will measure 0.15 meters in height and have four permanent leaves Was seedlings two seeds of Sweet Grape tomato per pot. The evaluation dry weight of the vegetative part of the tomato. The characteristics evaluated were plant height, diameter of the main stem, number of leaflets matter dry weight of tomato fruits, dry weight of the vegetative part of the tomato. Plant growth data were subjected to regression analysis and dry matter data were subjected to analysis of variance at P<0.05. The application of 225 and 300 kg/ha of nitrogen topdressing in tomato reduced leaflet number, main rush diameter and plant height. The use of different doses of nitrogen in topdressing did not affect the dry matter of the plant part of the tomato plants and fruits.