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Nutrient Content with Different Fertilizer Management and Influence on Yield and Fruit Quality in Apple cv. Gala
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Orientador(es)
Resumo(s)
Assessing a plant’s nutritional status and fertilizer rates and types that can optimize fruit
quality and yield are critical in intensive apple orchards. The aim of this work was to identify
correlations between nutrients in the different organs that allow the early diagnosis of the nutritional
status and to assess the impact on the optimal nutrient content in apple leaves, as well as in the
yield and quality of chemical and organic fertilization. Five orchards of ‘Gala’ were fertilized with
different levels of NPK over a period of four years. Macro and micronutrients of buds, flowers, 45 and
90–110 days after full bloom (DAFB) leaves and 60 DAFB and 15 days before harvest (DBH) fruits were
determined. Boron was the only element for which strong correlations, 0.7 < r < 0.9, were observed
between all organ pairs. The fertilization treatments did not affect the nutrient concentrations in
the leaves of 90–110 DAFB other than P, Ca and Mg and did not affect the macronutrients in the
fruit. In one of the five orchards, the yield increased by 26% with double fertilization compared to
standard fertilization and, for the other four orchards, the impact depended on the year. Fruit size
was more related to crop load than to fertilization and TSS and firmness were not affected by the type
or amount of fertilizers. Replacing part of the chemical fertilizer with organic materials did not affect
productivity or fruit quality
Descrição
Palavras-chave
bud flower leaves and fruit elements nutritional status chemical and organic fertilization productivity apple
Contexto Educativo
Citação
Mota, M.; Martins, M.J.; Policarpo, G.; Sprey, L.; Pastaneira, M.; Almeida, P.; Maurício, A.; Rosa, C.; Faria, J.; Martins, M.B.; et al. Nutrient Content with Different Fertilizer Management and Influence on Yield and Fruit Quality in Apple cv. Gala. Horticulturae 2022, 8, 713
Editora
MDPI