Produtividade e teor de nutrientes de flores da capuchinha (Tropaeolum majus L.) aumentam com uso de cama de frango no solo

Abstract

Nasturtium (Tropaeolum majus L.) is an unconventional plant or vegetable grown for ornamental, food and medicinal purposes. However, information on cultivation of the species involving organic residue is incipient. The aim of this study was to evaluate plant growth, flower productivity, and nutrient contents of leaves and flowers of Nasturtium (Tropaeolum majus L.) cultivated with addition of chicken manure to the soil. Five doses of chicken manure were studied, applied in the soil incorporated (I) (1, 6, 10, 14 and 19 t ha-1) and cover (C) (1, 6, 10, 14 and 19 t ha-1). Treatments were defined using the experimental array Plan Puebla III, leading to nine combinations of doses and forms of adding the chicken manure: 1) 6 t ha-1 I + 6 t ha-1 C; 2) 14 t ha-1 I + 6 t ha-1 C; 3) 6 t ha-1 I + 14 t ha-1 C; 4) 14 t ha-1 I + 14 t ha-1 C; 5) 10 t ha-1 I + 10 t ha-1 C; 6) 1 t ha-1 I + 6 t ha-1 C; 7) 19 t ha-1 I + 14 t ha-1 C; 8) 6 t ha-1 I + 1 t ha-1 C; 9) 14 t ha-1 I + 19 t ha-1 C. The experimental design was randomized blocks with four replicates and 16 plants per plot. The greatest maximum height of plants (35.75 cm) was reached at 168 days after transplanting (DAT) under 10 t ha-1 I and 10 t ha-1 C, and leaf area (11457 cm2/plant) and dry mass of leaves (84.32 g/plant), under 1 t ha-1 I and 19 t ha-1 C. The greatest productivity in number (15.4 million ha-1) and fresh (10.45 t ha-1) and dry mass (0.849 t ha-1) of flowers were obtained using doses close to 10 t ha-1 I and 10 t ha-1 C. The highest productivity of Nasturtium flowers were obtained under 10 t ha-1 I and 10 t ha-1 C of chicken manure.