Concentração de macronutrientes em crisântemo de vaso, cultivado sob diferentes relações NO3-/NH4+ - DOI: 10.4025/actasciagron.v27i3.1395

José Geraldo Barbosa; Moisés Alves Muniz; Hermínia Emília Pietro Martinez; Roberto de Aquino Leite; Antonio Américo Cardoso; Maurício Soares Barbosa

doi:10.4025/actasciagron.v27i3.1395

Concentration of macronutrients in potted chrysanthemum, cultivated under different NO3-/NH4+ ratios - DOI: 10.4025/actasciagron.v27i3.1395

José Geraldo Barbosa UFV
Moisés Alves Muniz UFV
Hermínia Emília Pietro Martinez UFV
Roberto de Aquino Leite UFV
Antonio Américo Cardoso YFV
Maurício Soares Barbosa UFV

DOI: https://doi.org/10.4025/actasciagron.v27i3.1395

Abstract

In order to study the effects of different ratios of NO₃^-/NH⁺⁴ on the development and mineral composition of chrysanthemum plants, an experiment was carried out in a greenhouse. Five plants in each vase containing 0.75 dm³ of substrate (soil: sand: coffee bean skin: manure at volumetric proportion of 2:0.5:1:1) were used. The treatments were arranged in complete randomized blocks in a factorial scheme (5x5) with three replications. There were five varieties (Puritan, Indianápolis, Coral Charm, Festival Time, Fine Time) and five ratios of NO₃^-/NH⁺₄ (100/0, 75/25; 50/50; 25/75, 0/100) totalizing 75 vases. The ratios NO₃^-/NH⁺₄ affected the dry weight accumulation in the aerial portion of the plants. There were differences among the varieties regarding the tolerance to presence of NH₄⁺ in the irrigation solution. The Fine Time was the most sensitive, supporting only 25% of NH₄⁺ in the solution. When 50/50 ratio was used the concentrations of N, P, K, Ca, Mg and S were adequate for the development of the plants.

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Author Biography

José Geraldo Barbosa, UFV

Possui graduação pela Universidade Federal de Viçosa (1977) , mestrado em Genética e Melhoramento pela Universidade Federal de Viçosa (1980) e doutorado em Fitotecnia pelo Departamento de Horticultura e Silvicultura (1996) . Atualmente é Outro (Prof. Adj.iv) da Universidade Federal de Viçosa. Tem experiência na área de Agronomia , com ênfase em Floricultura, Parques e Jardins. Atuando principalmente nos seguintes temas: Crisântemo, Argila expandida, Cultivo hidropônico Currículo Lattes

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Published

2008-03-27

How to Cite

Barbosa, J. G., Muniz, M. A., Martinez, H. E. P., Leite, R. de A., Cardoso, A. A., & Barbosa, M. S. (2008). Concentration of macronutrients in potted chrysanthemum, cultivated under different NO3-/NH4+ ratios - DOI: 10.4025/actasciagron.v27i3.1395. Acta Scientiarum. Agronomy, 27(3), 387-394. https://doi.org/10.4025/actasciagron.v27i3.1395

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Issue

Vol 27 No 3 (2005)

Section

Crop Production

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