Dosis del nitrógeno en el abonado de minijardin clonal de pitangueras (Eugenia uniflora)

• Autor(a) principal: Lattuada, Daiane Silva
• Data de Publicação: 2016
• Outros Autores: Altmann, Taís, Back, Marina Martinello, Lourosa, Gil Vicente, Souza, Paulo Vitor Dutra de
• Tipo de documento: Artigo
• Idioma: spa
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/194225
• topic: Reprodução assexuada; Pitanga; Fertilizante nitrogenado; Myrtaceae; Asexual propagation; Clonal multiplication; Myrtaceae; Propagación asexuada; Multiplicación clonal; Myrtaceae

The minicutting is an effective and quick method of vegetative propagation, dedicated to spread of forest and fruit trees, providing the formation of homogeneous orchards. In order to determine the adubation management in multiplication of Surinam cherry trees by minicutting in clonal gardens, we tested increased nitrogen (N) doses in fertilizer formulation, in two stages, over a period of 260 days. The solutions adopted in the first stage were: solution A: 10 g L-1 Kristalon® (NPK 4,5-9,6-28,8), solution B: 10 g L-1 Kristalon® + 3.5 g of urea (NPK 18 -9,6-28,8) and solution C: 10 g L-1 Kristalon® + 7.0 g of urea (NPK 36-9,6-28,8). In the second step we used half of the fertilizer Kristalon® doses (5 g L-1) and the same additions of urea. We evaluated the production and rooting of minicuttings and we monitored the pH and electrical conductivity (EC) of each solution and of the substrate. The experimental design was the completely randomized design, with seven vessels with five stock plants each per treatment. The first collect of minicuttings occurred seven days after we started the treatment. The solutions A and B promoted greater production of mini cuttings. The reduction of commercial fertilizer increased the rooting and reduced the flutuations in pH and EC values. The production in large scale of cuttings of this species by using this technique is possible particularly when low doses of nitrogen in the fertilizer.