QUALITY OF <i>Tabebuia aurea</i> (Manso) Benth. &amp; Hook<i>.</i> SEEDLINGS IN TWO ENVIRONMENTS AND LEVELS OF FERTIGATION

Dantas, Renata de Paiva; Oliveira, Francisco de Assis de; Cavalcante, Antonio Lucieudo Gonçalves; Pereira, Kleane Targino Oliveira; Oliveira, Mychelle Karla Teixeira de; Medeiros, José Francismar de

doi:10.5902/1980509833370

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Nota Técnica • Ciênc. Florest. 28 (03) • Jul-Sep 2018 • https://doi.org/10.5902/1980509833370 copy

QUALITY OF Tabebuia aurea (Manso) Benth. & Hook. SEEDLINGS IN TWO ENVIRONMENTS AND LEVELS OF FERTIGATION

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The quality of seedlings of tree species is crucial to succeed in reforestation project or commercial exploitation. This work was to evaluate the influence of two environments (AMB-1, greenhouse; AMB-2, plastic camera installed inside the greenhouse) and concentrations of nutrients applied by fertigation (0; 50; 100 and 150% of a patterns nutrient solution) in the production of seedlings of Tabebuia aurea using design was completely randomized, with four replications. The following growth characteristics were evaluated: height, stem diameter, number of leaves, leaf area, dry matter aerial part, dry root matter, dry root weight, total dry matter, height/stem diameter ratio, specific leaf area, leaf area ratio and Dickson quality index (IQD). Data analysis revealed that there was significant interaction between the factors for most variables. The use of the plastic chamber (AMB-2) provided greater growth of Tabebuia aurea seedlings. Fertigation solutions with nutrient concentrations varying from 80 to 100% of the standard solution provide better quality Tabebuia aurea seedlings.

Keywords:
Tabebuia aurea; forest species; index of Dickson quality

Tabela 1 Atributos químicos do solo utilizado no experimento

pH	CE	P	K	Na	Ca	Mg	(H+Al)	SB	CTC	t	V	PST
H₂O	dS m^-1	mg dm^-3			cmol_c dm^-3						%
6,18	0,06	5,22	44,53	8,65	1,62	1,88	1,32	3,65	4,79	3,65	73	1

Tabela 2 Resumo da análise de variância e valores médios para as variáveis de crescimento em mudas de Tabebuia aurea (Manso) Benth. & Hook. produzidas em dois ambientes e submetidas a diferentes níveis de fertirrigação

Fontes de variação	GL	Quadrados médios
Fontes de variação	GL	H	DC	NF	AF	MSPA	MSR	MST	H/DC	AFE	RAF	IQD
Solução de fertirrigação (SOL)	1	15,88**	0,41 ^ns	23,87**	4151,47 ^ns	4,91**	1,41**	5,91**	0,11 ^ns	3293,55**	383,02**	13,29**
Ambientes (AMB)	3	1281,45**	60,72**	200,10**	1167227,75**	21,71**	23,17**	89,68**	41,38**	9762,24**	38,24 ^ns	0,49*
SOL X AMB	3	3,71 ^ns	1,21 ^ns	29,75**	64821,21**	1,44**	1,07**	1,83**	0,07 ^ns	3073,97**	606,49**	0,29 ^ns
Resíduo	24	2,1	0,8	1,62	7554,72	0,25	0,08	0,34	0,16	303,66	62,85	0,13
CV (%)		9,35	9,13	9,76	13,85	9,76	12,98	12,23	11,63	9,11	13,65	10,51
Teste de médias		ALT	DC	NF	AF	MSPA	MSR	MST	ALT/DC	AFE	RAF	IQD
Ambientes		Cm	mm	unidade	cm² planta	-g planta^-1 -				cm² g^-1 MSF	cm² g^-1 MST
AMB - 1		25,45 b	11,17 a	16,44 b	1002,43 b	8,42 b	1,35 b	9,77 b	2,29 b	171,79 b	103,56 a	4,01 a
AMB - 2		35,80 a	8,42 b	21,44 a	1384,40 a	10,07 a	3,05 a	13,12 a	4,56 a	208,73 a	105,74 a	2,72 b
Média		30,62	9,8	18,94	1193,42	9,25	2,2	11,45	3,43	190,26	104,65	3,37

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E-mail: cienciaflorestal@ufsm.br

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[TFN1] Em que: pH = potencial hidrogeniônico; CE = condutividade elétrica; K = potássio; Na = sódio; Ca = cálcio; Mg = magnésio; (H+Al) = acidez potencial; SB = soma de bases; CTC = capacidade de troca de cátions; t = CTC efetiva; V = saturação por bases; PST = porcentagem de sódio trocável.