Organic residue and nitrogen on the biomass production of nasturtium (Tropaeolum majus L.) 'Jewel'The objective of this work was to evaluate growth, development and yield of Trapaeolum majus L. flowers as a function of the use of chicken manure and mixed organic residue associated or not with Nitrogen. The work was carried out at Medicinal Plant Garden - HPM of the Federal University of Mato Grosso do Sul - UFMS, in Dourados - MS, from May to October, 2002. Studied treatments were control (normal soil) - T, nitrogen (60 kg.ha-1 of N, in ammonia sulfate form) - N, chicken manure (15000 kg ha-1 of semi-decomposed chicken manure) - CF, chicken manure associated with nitrogen - CFN, mixed residue (15000 kg ha-1) - RM and mixed residue associated with nitrogen - RMN, which were established in a randomized experimental design with four replications. Evaluated characteristics were plant height, dried and fresh matter of aerial part without flowers, fresh and dried matter of flowers, flower diameter and height, N and P content in leaves and flowers. The highest plant height was of 36.33 cm in CF treatment. Plants from CFN treatment showed the greatest yield of fresh (52,195.69 kg.ha-1) and dried (6,281.14 kg.ha-1) matters of aerial parts without flowers, and of fresh (3,150.97 kg.ha-1) and dried (232.17 kg.ha-1) matters and number of flowers (50.49 millions.ha-1). Diameters and heights of flowers did not varied with treatments used. The highest contents of N (35.6 g kg-1) and of P (2.5 g kg-1) in leaves were with the use of CF. For flowers, the use of mixed residue associated with nitrogen - RMN resulted in 35.8 g kg-1 of N and the use of nitrogen - N in 3.9 g kg-1 of P.
Nasturtium; chicken manure; mixed organic residue; mineral nutrition; productivity