Shading and slow release fertiliser affect early growth in seedlings of Pau-marfim

Smiderle, Oscar José; Souza, Aline das Graças; Menegatti, Renata Diane; Dias, Thiago Jardelino; Montenegro, Raiovane Araújo

doi:10.1590/2179-8087-FLORAM-2020-0023

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ORIGINAL ARTICLE, Silverculture • Floresta Ambient. 28 (1) • 2021 • https://doi.org/10.1590/2179-8087-FLORAM-2020-0023 copy

Shading and slow release fertiliser affect early growth in seedlings of Pau-marfim

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The aim of this study was to evaluate the initial growth of Agonandra brasiliensis Miers ex Benth. & Hook. F. in response to different levels of shading and doses of controlled-release fertiliser (CRF). The experiment was conducted at Embrapa Roraima in Boa Vista, in a completely randomised experimental design and a 2 x 5 factorial scheme, of two luminosity levels (50 and 30%) and five doses of CRF (formulation 18-05-09, NPK) (0, 0.5, 1, 2 and 3 g L^-1 substrate), with five replications, each consisting of five plants. At 240 days after transplanting, the growth characteristics were evaluated, and the influence of the light levels and the CRF dose was recorded on these characteristics, either individually or interactively. It is suggested that plants of Agonandra brasiliensis be fertilised with a dose of 2 g L^-1 CRF and grown in an environment with 50% of luminosity to maximize growth and efficiency in the production of high-quality seedlings.

Keywords:
Ambiance; Native forest species; Plant nutrition; Seedling production

Substrate	OM	V	Al	H+Al	SB	CEC	P	K	Ca	Mg	Zn	Fe	Mn
	%		cmol_c dm^-3				mg dm^-3				μg dm^-3
Sand	0.00	67.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.44	0.00	0.00

Variation Source	Mean Square
	DF	CD	H	SDM	RDM	TDM	RSDM	DQI	D Inc	H Inc
		(mm)	(cm)	(g plant^-1)	(g plant^-1)	(g plant^-1)	RDM	DQI	(mm)	(cm)
Luminosity (L)	1	0.56^ns	62.72^ns	9.16^**	10.21^**	38.54^**	0.14^**	0.40^**	1.22^ns	0.17^**
Dose (D)	4	6.37^**	195.63^**	6.49^**	20.89^**	50.44^**	0.03^**	0.66^**	1.40^**	207.51^**
L x D	4	0.71^ns	208.17^**	1.48^**	2.58^ns	7.91^ns	0.015^**	0.004^ns	0.46^ns	167.26^**
Residual	40	0.22	50.28	0.35	0.92	2.35	0.02	0.05	0.17	37.80
Mean		3.72	25.76	1.88	4.08	5.96	0.44	0.82	1.43	10.22
CV (%)		12.58	27.53	31.55	23.58	25.74	11.23	28.2	29.14	60.15

	Dose (g L^-1)
Luminosity (L)	H (cm)
Luminosity (L)	0	0.5	1	2	3
50%	19.20aB	20.00aB	24.2aB	40.60aA	30.40aAB
30%	22.60aB	22.40aB	24.8aA	23.8bB	25.60aA
	SDM (g plant^-1)
50%	1.24aC	1.50aC	2.00aBC	4.06aA	2.76aB
30%	0.54bB	1.40aAB	1.64aA	1.98bA	1.72bA
	RSDM/RDM
50%	0.45aB	0.46aB	0.48aB	0.54aA	0.48aB
30%	0.24bC	0.44aAB	0.47aA	0.41bBC	0.38bB
	H Inc (cm)
50%	2.26aC	4.20aCB	7.26bCB	22.5aA	14.60aAB
30%	2.20aC	4.20aB	12.00aA	9.00bB	13.00aA

Luminosity (L)	RDM (g plant^-1)	TDM (g plant^-1)	DQI
50%	4.53a	6.83a	0.91a
30%	3.62b	5.08b	0.73b

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro Rodovia BR 465 Km 7, CEP 23897-000, Tel.: (21) 2682 0558 | (21) 3787-4033 - Seropédica - RJ - Brazil
E-mail: floram@ufrrj.br

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[1] CORRESPONDENCE TORenata Menegatti Universidade do Estado de Santa Catarina, Ciências Agrárias, 1200, CEP 88523-000, Lages, SC, Brasil e-mail: renata.d.menegatti@gmail.com