Nitrogen fertilizer affects the chemical composition of the substrate, the foliar nutrient content, the vegetative growth, the production and fruit quality of blueberry

Autores

  • Luciane Nolasco Leitzke Universidade Federal de Pelotas
  • Luciano Picolotto Embrapa Clima Temperado
  • Ivan dos Santos Pereira Embrapa Clima Temperado
  • Gerson Kleinick Vignolo Universidade Federal de Pelotas
  • Juliano Dutra Schmitz Embrapa Clima Temperado
  • Marcia Vizzotto Embrapa Clima Temperado
  • Luis Eduardo Corrêa Antunes Embrapa Clima Temperado

DOI:

https://doi.org/10.15361/1984-5529.2015v43n4p316-324

Palavras-chave:

nutrição mineral

Resumo

The objective of this study was to investigate the influence of different nitrogen fertilizer rates on chemical composition of substrate, vegetative growth, yield, fruit quality and leaf nutrient concentration of Misty and O'Neal blueberry cultivars. It was applied five nitrogen rates. In the years 2008 and 2009 were: 0, 5, 10, 15, and 20 g plant-1, whereas, in 2010, due to the growth and development of plants, the rates were: 0; 7.5; 15; 22.5; and 30 g plant-1. The variables analized were: plant height, dry mass of pruning, shoot length, chloro­phyll content, yield, fruit mass, pH, titratable acidity, soluble solids, anthocyanin content, antioxidant activity, total phenolics of fruits, leaf nutrient concentration (N, P, K, Ca, Mg, B, Fe, Mn and Zn), and chemical prop­erties of the substrate. Levels of N reduced the pH, exchangeable Ca and Mg and increased the Al content in the substrate. In leaves, there was an increase in N, P and Fe and a decrease in Ca, Zn, Mn and B. The highest yield was obtained with the estimated rate of 7.37 g plant-1 of N. Regarding functional compounds, there was a linear increase in antioxidant activity and phenolic compounds. It can be concluded that N fertili­zation with ammonium sulfate, significantly influenced the chemical composition of the substrate, nutrient content of leaves, vegetative growth, yield, and fruit quality of blueberries.

 

Additional keywords: ammonium sulfate; mineral fertilization; pH; Vaccinium.

Biografia do Autor

Luciane Nolasco Leitzke, Universidade Federal de Pelotas

Engenheira Agrônoma, doutora em agronomia. 

Luciano Picolotto, Embrapa Clima Temperado

Engenheiro Agrônomo, doutor em agronomia. Fruticultura de Clima Temperado

Ivan dos Santos Pereira, Embrapa Clima Temperado

Engenheiro Agrônomo, doutor em agronomia. Fruticultura de Clima Temperado

Gerson Kleinick Vignolo, Universidade Federal de Pelotas

Engenheiro Agrônomo, mestre em ciências, fruticultura de clima temperado.

Juliano Dutra Schmitz, Embrapa Clima Temperado

Engenheiro Agrônomo, Doutor em agronomia, área de Fruticultura de Clima Temperado.

Marcia Vizzotto, Embrapa Clima Temperado

Engenheira Agrônoma, doutora. Pesquisado da Embrapa Clima Temperado.

Luis Eduardo Corrêa Antunes, Embrapa Clima Temperado

Engenheiro Agrônomo, Doutor, Pesquisador da Embrapa Clima Temperado.

Publicado

01/10/2015

Edição

Seção

Fitotecnia - Crop Production