Nitrogen and Potassium Fertilization in the Initial Growth of <i>Annona crassiflora</i> Mart.

Costa, Andréia Mendes da; Carlos, Leandro; Silva, Patrícia Oliveira da; Barbosa, Kássia de Paula; Rodrigues, Carlos Ribeiro

doi:10.1590/2179-8087.034117

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Original Article, Silviculture • Floresta Ambient. 26 (2) • 2019 • https://doi.org/10.1590/2179-8087.034117 copy

Nitrogen and Potassium Fertilization in the Initial Growth of Annona crassiflora Mart.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Annona crassiflora Mart. presents medicinal and food potential, and is also used in the recovery of degraded areas, however, little is known about its nutritional requirements. The aim of this work was to analyze the initial growth of A. crassiflora submitted to nitrogen and potassium fertilization. The experiment was conducted with a complete randomized block design with four replicates, each consisting of five nitrogen and potassium doses (0, 50, 100, 150 and 200 mg dm^-3). Results were submitted to regression analysis. The species showed significant response for nitrogen fertilization regarding biometric variables, biomass, DQI and nutritional contents at doses of 100 to 200 mg dm^-3. On the other hand, potassium only influenced DQI, nutritional content and accumulation of A. crassiflora seedlings.

Keywords:
seedlings; nitrogen doses; potassium doses

Attributes	Natural	K 0	K 50	K 100	K 150	K 200	Nitrogen
pH (CaCl₂)	4.30	4.80	4.80	4.80	4.70	4.80	5.30
K (cmolc dm^-3)	0.11	0.23	0.32	0.40	0.51	0.51	0.45
Ca²⁺ (cmolc dm^-3)	0.40	1.67	1.99	1.92	2.24	1.85	1.79
Mg²⁺ (cmolc dm^-3)	0.10	1.47	1.70	1.51	1.97	1.44	1.30
Al³⁺ (cmolc dm^-3)	0.30	0.04	0.07	0.08	0.05	0.03	0.02
H+Al (cmolc dm^-3)	4.50	4.17	4.93	4.88	4.93	4.17	3.14
P (Mel) (mg dm^-3)	6.00	15.54	15.06	17.56	13.42	15.01	11.13
SB (cmolc dm^-3)	0.61	3.37	4.01	3.83	4.72	3.80	3.54
t (cmolc dm^-3)	0.91	3.41	4.08	3.91	4.77	3.83	3.56
T (cmolc dm^-3)	5.11	7.54	8.94	8.71	9.65	7.97	6.68
V(%)	11.99	44.69	44.85	43.97	48.91	47.68	52.99
Clay	50	50	50	50	50	50	50
Silt	18	18	18	18	18	18	18
Sand	32	32	32	32	32	32	32

K doses	D		H		NL		DML		DMSt		DMR		DMSh		TDM		R/S		H/D		DQI
mg dm^-3	mm		cm		NL		g		g		g		g		g		R/S		H/D		DQI
0	9.4	a	12.9	a	7.5	a	1.5	a	0.9	a	3.6	a	2.4	a	6.0	a	1.3	a	0.7	a	2.8	b
50	9.2	a	7.9	a	5.8	a	2.1	a	0.8	a	1.6	a	2.9	a	4.5	a	1.2	a	1.1	a	1.4	b
100	7.5	a	7.2	a	4.5	a	1.0	a	0.8	a	3.0	a	1.8	a	4.8	a	1.5	a	0.9	a	2.1	b
150	17.8	a	14.5	a	7.8	a	3.5	a	2.5	a	8.9	a	6.0	a	14.9	a	1.4	a	1.2	a	6.9	a
200	10.8	a	10.2	a	6.3	a	0.9	a	1.2	a	2.8	a	2.1	a	4.9	a	1.3	a	1.0	a	2.3	b

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[1] Leandro Carlos Programa de Pós-graduação em Ciências Agrárias, Departamento de Agronomia, Instituto Federal Goiano – IF Goiano, Rodovia Sul Goiana, Km 01, Zona Rural, CP 66, CEP 75901-970, Rio Verde, GO, Brasil e-mail: leandro.carlos@ifgoiano.edu.br