POPLAR (Populus deltoides Marsh) RESPONSE TO NITROGEN ADDITION AT TWO SITES IN SÃO MATEUS DO SUL, PR

• Autor(a) principal: Otto, Giancarlo Mira
• Data de Publicação: 2007
• Outros Autores: Motta, Antônio Carlos Vargas, Reissman, Carlos Bruno
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/1939
• topic: Poplar nutrition; wod production; implanted forests.; Nutrição do álamo; produção de madeira; florestamento

Poplar plantations have shown a growth pattern well below their potential in Iguaçu River Basin, PR, Brazil. In addition, there is a lack of information about poplar nutrition and response to fertilizer application in the area, limiting fertilizer recommendation. This study evaluated the poplar response to N rates (0, 20, 40 e 80 kg ha-1.yr) and a combined effect with the application of N, P2O5,, and K2O (27, 15, and 11 kg ha-1.yr), during three years after planting in two sites (lowland and dryland area). Better tree growth was observed at dryland area and fertilizer application provided a small improvement on circumference at breast high and total high in both sites. There was a positive correlation between soil properties (P, Ca, and pH) and nutrient concentration in the leaves (P, Ca and B) with plant growth. Results suggested the need of soil fertility adjustment, by acidity correctors and fertilizers, before tree planting.