Controlled-Release Fertilizer and Container Volume to Produce <i>Inga laurina</i> Seedlings

Cabreira, Gerhard Valkinir; Leles, Paulo Sérgio dos Santos; Alonso, Jorge Makhlouta; Resende, Alexander Silva de; Cabreira, Wilbert Valkinir; Sousa, Thasso José Silva e

doi:10.1590/2179-8087-FLORAM-2019-0057

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ORIGINAL ARTICLE, Silviculture • Floresta Ambient. 28 (1) • 2021 • https://doi.org/10.1590/2179-8087-FLORAM-2019-0057 copy

Controlled-Release Fertilizer and Container Volume to Produce Inga laurina Seedlings

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This study evaluated the production of Inga laurina (Sw.) Willd seedlings in 110 and 280 cm³ tube containers and growing doses (0, 3, 6 and 12 kg m^-3) of controlled-release fertilizer (CRF) (15-09-12) and their performance at 5 and 12 months after outplanting. The experiment was conducted using a randomized split-plot design, in a 2 x 4 arrangement (tube volumes x CRF doses). Stabilized sewage sludge from urban origin was used as substrate. It was assessed growth and biomass of the seedlings in nursery, as well as survival and growth after outplanting. Containers of 280 cm³ and doses between 6 to 12 kg m^-3 produced seedlings in less time, with higher growth and biomass. At 12 months after outplanting, seedlings presented acceptable growth and mortality rate with doses equal or greater than 6 and 3 kg m^-3 of CRF, respectively, for the 110 and 280 cm³ tube.

Keywords:
Sewage sludge; plastic tube; forest nursery

^*1 pH	^*2 N	^*3 P	^*4 K ⁺	^*5 Ca	^*5 Mg	^*5 Al	^6 O.M.*	Density
	--------------------------------------- % ---------------------------------------							kg dm^-3
5.5	1.94	0.81	0.19	1.59	0.19	2.72	35.3	0.72

CRF Doses (kg m^-3)	Height (cm)		SD (mm)		LA (cm²)		SDM (g)		RDM (g)
CRF Doses (kg m^-3)	110	280	110	280	110	280	110	280	110	280
0	13.2	20.9*	3.3	4.3*	48	168*	5.6	7.2*	5.2	5.8*
3	18.5	27.0*	4.4	5.5*	110	242*	6.8	8.6*	6.2	6.8 ns
6	21.0	30.1*	5.2	6.1*	163	280*	7.5	9.9*	6.3	7.4*
12	22.8	29.5*	5.5	6.1*	148	313*	8.0	10.5*	6.5	8.1*

MthE	110 cm³	280 cm³
MthE	----------------- g m^-3 -------------------
Height	10.4	8.5
Stem diameter	10.5	7.3
Leaf area	8.5	11.0
Shoot dry mass	10.5	10.1
AVERAGE	10.0	9.2

Tube	Dose	N	P	K	Ca	Mg
	(kg m^-3)	Mean content (g kg^-1)
110 cm³	0	23.0	3.4	7.8	21.3	0.94
	3	22.4	3.1	7.4	24.2	0.94
	6	19.5	2.4	7.0	17.1	0.97
	12	18.5	1.6	5.7	15.6	1.13
280 cm³	0	24.8	2.1	6.2	20.1	0.66
	3	24.4	2.1	6.5	18.1	0.76
	6	18,2	1.6	6.0	13.6	0.87
	12	19.1	1.5	5.4	12.0	1.03

Tube volume		-Planting-		------- 5 months ------		--------------- 12 months ------------
Tube volume	Dose	H (cm)	DQI	S (%)	H (cm)	S (%)	H (cm)	DGL (mm)
110 cm³	0	20.2	2.15	90	28.9	75	44.3	12.1
	3	26.0	2.45	90	36.0	85	48.3	13.2
	6	28.5	2.62	100	38.4	95	52.9	14.5
	12	32.9	2.68	100	41.6	100	50.7	12.8
	Average	26.9*	2.47*	95	36.2*	88.8	49.1^ns	13.2*
280 cm³	0	28.9	2.15	90	38.6	85	50.5	14.3
	3	36.4	2.50	100	44.5	95	55.2	17.4
	6	37.9	2.74	100	46.0	100	56.0	16.1
	12	40.8	3.01	95	48.0	90	57.8	17.5
	Average	36.0*	2.60*	96.3	44.3*	92.5	54.9^ns	16.3*

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 TOJorge Makhlouta Alonso Universidade Federal Rural do Rio de Janeiro, Km 07, Zona Rural, BR-465, CEP 23890-000, Seropédica, RJ, Brasil e-mail: j_makh@hotmail.com