Data/hora: 03/06/2024 07:44:07

Provedor de dados: | 90
País: | Brazil
Título: | Effect of Nitrogen and Potassium Rates on Early Development of Macaw Palm
Autores: | Pimentel,Leonardo Duarte; Bruckner,Claudio Horst; Martinez,Hermínia Emília Prieto; Motoike,Sérgio Yoshimitsu; Manfio,Candida Elisa; Santos,Rafael Carlos dos.
Data: | 2015-12-01
Ano: | 2015
Palavras-chave: | Acrocomia aculeata; Side-dressing fertilization; Macaw palm; Leaf mineral nutrient content.
Resumo: | ABSTRACT The economic exploitation of macaw palm [Acrocomia aculeate(Jacq.) Lodd. ex Mart.] is currently in transition, from extractivism to agricultural cultivation, thus requiring studies on the fertilization of the crop. This study evaluated the response of three genotypes of macaw palm to increasing rates of nitrogen and potassium, grown in the field until the 2nd year and to establish reference contents of mineral nutrients in the leaf. The experiment was a split-plot randomized block design with five main treatments (N and K rates) and three secondary treatments (genotypes), with three replications, each plot containing three plants. Plant height, leaf number, vigor, and nutrient contents in leaf tissues were evaluated at the end of 2nd year of cultivation. Differential responses were observed among genotypes, indicating that some genotypes are more efficient in the use of mineral inputs. There was a differentiated and positive response to increasing side-dressed N and K rates in the vegetative development of macaw genotypes until the 2nd year of field cultivation, indicating variability in the species in terms of nutrient use efficiency. The N and K fertilization rate corresponding to 360 g N + 480 g K2O per plant, in four split applications over the two years of cultivation, was insufficient to induce maximum vegetative development in the three macaw genotypes. There was no variation in macro- and micronutrient contents in leaf dry matter of the three macaw genotypes.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601671
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/01000683rbcs20140352
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.39 n.6 2015
Fonte: | info:eu-repo/semantics/openAccess