Influence of different phosphorus doses on growth of Peltophoru dubium (Sprengel) Taubert plants.

• Autor(a) principal: Schumacher, Mauro Valdir
• Data de Publicação: 2003
• Outros Autores: Ceconi, Denise Ester, Santana, Cedinara Arruda
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Florestal Brasileira (Online)
• Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1611
• topic: Fósforo; Peltophorum dubium; Crescimento; Nutrição; Phosphorus; Peltophorum dubium; Growth; Nutrition

This experiment was conducted with the objective to study the effects of different phosphorus doses in the growth of Canafístula seedlings (Peltophorum dubium). As substratum was used yellow-reddish argisoil, collected on the superficial layer (0-20 cm), which was discloded, homogenized, draught in the air, passed in a sieve of 2 mm and after a analyzed chemically. As complementary fertilization were added 10 mg kg-1 of N and 12,5 kg-1 of K, the sources were (NH4)2SO4 and KCl. The experimental design used was completely randomized with 8 treatments and 8 repetitions, totalizing 64 plots. The treatments were constituted by: control (soil without phosphorus addition), 90, 180, 270, 360, 450, 540, 630 mg kg-1 of P (utilizing CaHPO4 as salt). As vessels were used polypropylene vases with the capacity of 2,0 dm3. The humidity used in the vases was 80% of the field capacity. After 130days, the following parameters were evaluated: height of the aerial part, stem diameter, biomass above ground, root biomass and total biomass. The dose of 360 mg kg-1 of P, resulted in a higher growth of Peltophorum dubium plants.