Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/34830
Título: Macronutrient uptake and export in transgenic corn under two levels of fertilization
Título(s) alternativo(s): Absorção e exportação de macronutrientes em milho transgênico sob dois níveis de fertilização
Palavras-chave: Zea mays
Fertilizer use efficiency
High productivity
Luxury consumption
Nutrient absorption
Nutritional requirement
Fertilization efficiency
Nutrient extraction
Eficiência de uso de fertilizantes
Alta produtividade
Consumo de luxo
Extração de nutrientes
Exigência nutricional
Eficiência da fertilização
Data do documento: Mar-2018
Editor: Empresa Brasileira de Pesquisa Agropecuária (Embrapa), Secretaria de Pesquisa e Desenvolvimento (SPD)
Citação: SILVA, C. G. M. et al. Macronutrient uptake and export in transgenic maize under two levels of fertilization investment. Pesquisa Agropecuária Brasileira, Brasília, v. 53, n. 12, p. 1363-1372, Dec. 2018. DOI: 10.1590/s0100-204x2018001200009.
Resumo: The objective of this work was to evaluate macronutrient uptake and export by transgenic corn hybrids under medium and high fertilization levels. For each fertilization level, a randomized complete block design was carried out in the summer crop season, under no-tillage and supplementary irrigation, with four cultivars and four replicates. Plants were sampled throughout the entire cycle and separated into leaves, stalk, husk, cob, and grains for the determination of dry matter mass and accumulation of macronutrients in the different growth stages. Under the high fertilization level, a greater dry matter mass and nutrient uptake were observed, but grain yield was similar to that under the medium fertilization level. The uptake of N, P, Ca, Mg, and S occurs until later in the cycle of the transgenic cultivars, which also showed lower concentrations of P, K, and S in grains, when compared to older hybrids. The differential behavior of the evaluated cultivars under different fertilization levels indicates the need of updating and improving nutritional management and fertilizer recommendations for the corn crop.
URI: http://repositorio.ufla.br/jspui/handle/1/34830
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