Nutrient content and redistribution in leaves of Hevea brasiliensis and Pinus oocarpa

• Autor(a) principal: Rodrigues, Maria do Rosário Lobato
• Data de Publicação: 2000
• Outros Autores: Neves, Carmen Silvia Vieira Janeiro, Silva, Alexandre, Santos, Anacleto Ranulfo dos, Paiva, Ary Vieira de, Mello, Sérgio L. de M.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4974
• topic: Pine; Rubber tree; Macronutrients; Nutrition; Biochemical cycling; Pinheiro; Seringueira; Macronutrientes; Nutrição; Ciclagem bioquímica.

The content of macronutrients (N, P, K, Ca, Mg, and S) and nutrient redistribution were evaluated in leaves of two species, an 8 years old angiosperm (Hevea brasiliensis) and a 25 years old a gymnosperm (Pinus oocarpa), both cultivated on an eutrophic Red Brown Earth (Alfissol). Leaves were collected at three different phenological states: young, mature, senescent and from the litterfall. The nutrient content of Hevea was higher, presenting 3 to 4 times higher concentrations of N, P, K and Ca suggesting that the pine had greater capacity of producing biomass with a relatively low amount of nutrients. In Pinus oocarpa 43% ofN, 65% of P and 75% of K was transferred from old to young leaves while, for Hevea, the nutrient return was 59%> for N, 65% for P and 60% for K.