SciELO - Scientific Electronic Library Online

 
vol.29 número3Emergência e desenvolvimento de plântulas de maracujazeiro azedo oriundas de sementes tratadas com bioestimulanteAplicação superficial de calcário em pomar de laranjeira pêra em produção índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945versão On-line ISSN 1806-9967

Resumo

BOARETTO, Rodrigo Marcelli et al. Nutrients accumulation and fate of nitrogen (15N) in Young bearing orange trees. Rev. Bras. Frutic. [online]. 2007, vol.29, n.3, pp.600-605. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452007000300035.

Information about nutrient absorption of citrus orchards is important to establish guidelines for best soil fertility management. However, studies on the fate of applied N fertilizers and validation of nitrogen (N) dose recommendations are scarce in the literature. The present work evaluated (i) the accumulation of nutrients and the distribution of N (15N) applied to citrus orchard and (ii) validated the N fertilization rate applied to young bearing orange trees. Three- to four-year-old Pêra sweet orange trees Pera grafted on Rangpur lime were fertilized with 150, 300, 450, and 600 g of N per tree, as ammonium sulfate, split in three applications from spring to summer. A control treatment without N was included. In the same orchard, three plants were fertilized with 300 g per tree of N-[(15NH4)2SO 4)] labeled with 15N to study the fate of N in the soil-orange tree system. Fruit yield and recovery of 15N by tree biomass were evaluated. The efficiency of fertilization, estimate by tree N absorption, varied from 20 to 27% of the total applied N. Fruits exported 35% of the N taken up from fertilizer. Furthermore, the highest fruit yield was attained with N rate of 400 g/tree.

Palavras-chave : Citrus; isotope stable; mineral nutrition; nutrient distribution; ammonium sulfate.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons