| This study aimed at comparing the growth of potted ornamental sunflowers submitted to doses of nitrogen by fertirrigation in greenhouse, using the technique of growth analysis. The experiment was carried out at the Department of Natural Resources - Soil Science, on the Experimental Farm Lageado, which belongs to FCA, UNESP, Botucatu (São Paulo, Brazil), in a greenhouse, from August 21 to October 22, 2008. We adopted the randomized block design with four doses of nitrogen (75%, 100%, 125% and 150%), using a 100% reference dose of 0.035 g L-1 during the vegetative stage and 1.66 g L-1 in the reproductive phase, with the ammonium nitrate as a source. Seeds of ornamental sunflower, cultivar Sumbrite Supreme Sunflower F1, from SAKATA ®, were sown in trays... |
