Macronutrient extraction curves of the onion crop
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Data
2019-11-01
Autores
Reis Goncalves, Felipe Augusto
Aquino, Priscila Maria de
Duarte, Luiz Otavio [UNESP]
Batista Almeida de Aquino, Rosiane Filomena
Reis, Marcelo Rodrigues dos
Aquino, Leonardo Angelo de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Univ Estadual Londrina
Resumo
This study aimed to determine the extraction curves and accumulation order of macronutrients of two onion cultivars. In commercial fields in the region of Alto Paranaiba, MG, Brazil, onion plants of the cultivars 'Optima' and 'Sirius' were collected during the cycle in 2014 and 2015 to determine dry matter and macronutrient accumulation. The yield was determined at harvest time. Three phases of dry matter and nutrient accumulations were observed. The first phase had a slow accumulation and was followed by a fast increment and subsequent stabilization in phases two and duce, respectively, for most of the nutrients in both cultivars and years of cultivation. Duration and accumulated at each phase were different between cultivars and years of cultivation. The total and commercial bulb yield did not vary between cultivars but only between years of cultivation, with average values of 117 and 60 Mg ha(-1) in 2014 and 2015, respectively. The partitioning of dry matter and macronutrients followed the same model for both cultivars and years of cultivation. Macronutrients with the largest partitioning for bulbs are P and S. The decreasing extraction order for both cultivars was K > Ca > N > P > Mg > S in 2014 and K > N > Ca > P > S > Mg in 2015.
Descrição
Palavras-chave
Nutrient accumulation, Allium cepa, Harvest index, Plant nutrition, Uptake rates
Como citar
Semina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 40, n. 6, p. 2497-2511, 2019.