Nitrogen and potassium fertilization in yield and macronutrients contents of heliconia cv. Golden Torch

Beckmann-Cavalcante, Márkilla Z.; Amaral, Genilda C.; Silva, Alcimar de S. e; Brito, Leonardo P. da S.; Lima, Augusto M. N.; Cavalcante, Ítalo H. L.

doi:10.1590/1807-1929/agriambi.v20n4p337-342

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SOIL, WATER AND PLANT MANAGEMENT • Rev. bras. eng. agríc. ambient. 20 (4) • Apr 2016 • https://doi.org/10.1590/1807-1929/agriambi.v20n4p337-342 copy

Nitrogen and potassium fertilization in yield and macronutrients contents of heliconia cv. Golden Torch

Adubação nitrogenada e potássica na produtividade e teores de macronutrientes em helicônia cv. Golden Torch

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the effect of nitrogen (N) and potassium (K) fertilization in yield and contents of macronutrients in heliconia plants (Heliconia psittacorum x Heliconia spathocircinata Aristeguieta) cv. Golden Torch. The experiment was set in a randomized block design, in a 4 x 4 factorial, corresponding to N doses (0, 120, 180 and 240 g of N hole^-1) and K doses (0, 120, 180 and 240 g of K₂O hole^-1) with four replicates and five rhizomes per plot, under field conditions. After one year of cultivation, yield (number of flower stems per square meter) and the leaf contents of N, P, K, Ca, Mg and S were determined. The applied N doses did not influence either yield or the leaf contents of the evaluated macronutrients. K fertilization favored the increase in leaf K content and the decrease in the contents of P, Ca and Mg in leaves of heliconias. Under the conditions of this experiment, it is recommended to apply 161.46 g of K₂O hole^-1 for a maximum yield of 9.89 stems m^-2 per month.

Key words:
Heliconia psittacorum; floriculture; fertilization; nutritional status

pH	P	K⁺		Ca²⁺	Mg²⁺	Ca+Mg	Al³⁺	H+Al	CEC	OM dag kg^-1	m	V	Clay	Silt	Sand
pH	mg dm^-3			cmol_cdm^-3						OM dag kg^-1	%
4.2	6	104		0.5	0.2	0.7	0.5	2.6	3.6	1.6	42	27	31	11	58

Source of variation	Yield NFS m^-2	N	P	K	Ca	Mg	S
N doses (F value)	1.38^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	2.44^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	2.85^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.13^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	0.91^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.19^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	0.39^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems
K doses (F value)	3.70^* * and ** Significant at 0.05 and 0.1 probability levels, respectively;	2.41^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	2.71^* * and ** Significant at 0.05 and 0.1 probability levels, respectively;	16.03^ * and **** Significant at 0.05 and 0.1 probability levels, respectively;	2.86^* * and ** Significant at 0.05 and 0.1 probability levels, respectively;	22.61^ * and **** Significant at 0.05 and 0.1 probability levels, respectively;	2.77^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems
Interaction N x K (F value)	0.89^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	0.66^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.02^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	0.80^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.59 ^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.42^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	0.33^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems
Blocks (F value)	3.18^* * and ** Significant at 0.05 and 0.1 probability levels, respectively;	0.75^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.85^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	2.98^* * and ** Significant at 0.05 and 0.1 probability levels, respectively;	1.35^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.87^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems	1.64^ns ns Not significant (p ≥ 0.05); CV - Coefficient of variation; NFS - Number of flower stems
CV (%)	25.70	6.97	13.76	17.18	15.89	20.56	10.89

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[1] markilla.beckmann@univasf.edu.br (Corresponding author)