Produção de brócolis fertirrigado com nitrogênio em Dourados, MS

Abstract

The aim was to analyze the production components broccoli fertilized with different nitrogen rates, grown in Oxisol in Dourados, MS, Brazil. The experiment was conducted between the period of October 2012 to January 2013 at the experimental field of Irrigation and Drainage, of the Faculdade de Ciências Agrárias da Universidade Federal da Grande Dourados (Faculty of Agricultural Sciences, Federal University of Great Dourados). The experimental design was a randomized block with four replications. The treatments consisted of six concentrations of nitrogen (zero , 80, 160 , 240 , 320 and 400 kg ha- 1), paid in 12 applications. We used the hybrid broccoli variety “Sakata Avenger“. The irrigation management was carried out by estimating daily reference evapotranspiration (ETo), based on the Penman- Monteith. The Fertirrigations performed by a pressurized container system, developed in Faculdade de Ciências Agrárias da Universidade Federal da Grande Dourados, the injection being performed by means of differential pressure. This container was inserted the amount of nitrogen in the form of urea required according to each tratamento. The characteristics evaluated were: head height, head diameter, head fresh and dry weight of the head and yield. The data were submitted analysis of variance and regression studies. We conclude that for maximum yield of broccoli in the summer of Dourados, MS, is required to apply 226.76 kg ha-1 of nitrogen fertigation.