PRODUCTION OF SEEDLINGS OF <i>Psidium cauliflorum</i> Landrum &amp; Sobral

MENDONÇA, ANDREA VITA REIS; SANTOS, JIOVANA PEREIRA AMORIM; VERDE, DENISE DOS SANTOS VILA; SOUZA, MANUELA OLIVEIRA DE; SOUZA, JOSIVAL SANTOS

doi:10.1590/1983-21252020v33n216rc

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Forest Science • Rev. Caatinga 33 (2) • Apr-Jun 2020 • https://doi.org/10.1590/1983-21252020v33n216rc copy

PRODUCTION OF SEEDLINGS OF Psidium cauliflorum Landrum & Sobral

PRODUÇÃO DE MUDAS DE Psidium cauliflorum Landrum & Sobral

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

In the absence of knowledge about the procedures for production of seedlings of particular tree species, determining the nursery production period and quality standards are normally priority aspects for studies. As there is no information on the propagation of P. cauliflorum in the literature, the objective of this study was to determine the length of stay in the nursery, the size of the container and the quality standards for the production of seedlings of this species, based on the performance in the nursery and in the field. The work was carried out in two stages. In the first, seedling growth was analyzed in the nursery and in the second stage their performance was analyzed in the field. We tested three container sizes: 55 cm³ (12.5 cm-length x 2.9 cm-internal diameter), 180 cm³ (13.5 cm x 5.2 cm) and 280 cm³ (19.0 cm x 5.2 cm) and different periods of seedling production in tubes (15, 30, 45, 60, 75, 90, 105 and 120 days). It is recommended that P. cauliflorum seedlings be grown in containers of 180 cm³ (13.5 cm x 5.2 cm) and remain in these containers for at least 120 days. The experiment to assess post-planting performance was crucial to obtain conclusive results for the production of P. cauliflorum seedlings.

Keywords:
Container size; Seedling age; Quality standard

Source of variation	d.f.	Shoot length	Root collar diameter	Sturdiness quotient
Container size	2	92.90^ Significant at 0.01.	1.10^ Significant at 0.01.	5.13^ Significant at 0.01.
Residual (a)	18	4.88	0.04	0.55
Periods	7	472.45^ Significant at 0.01.	11.36^ Significant at 0.01.	19.68^ Significant at 0.01.
Container size x Periods	14	10.40^ Significant at 0.01.	0.12^ Significant at 0.01.	0.34^ Significant at 0.01.
Residual (b)	126	0.71	0.005	0.08

Source of variation	d.f.	Shoot dry mass	Root dry mass	DQI	Leaf area	Fine root length	Main root length
Container size	2	1.59E+00^ Significant at 0.01.	6.00E-02^ Significant at 0.01.	1.36E-02^ Significant at 0.01.	3.67E+04^ Significant at 0.01.	1.95E+07^ Significant at 0.01.	2.26E+02^ Significant at 0.01.
Residual (a)	9	9.00E-02	1.00E-03	3.00E-04	2.37E+03	9.31E+05	4.80E+00
Seedling age	3	2.84E+00^ Significant at 0.01.	1.91E-01^ Significant at 0.01.	4.11E-02^ Significant at 0.01.	2.45E+04^ Significant at 0.01.	2.29E+07^ Significant at 0.01.	1.40E+00
Container size x
Seedling age	6	2.90E-01^* * Significant at 0.05.	1.10E-02^ Significant at 0.01.	2.50E-03^* * Significant at 0.05.	3.12E+03	1.15E+06	3.50E+00
Residual (b)	27	1.10E-01	2.00E-03	1.00E-03	2.78E+03	1.26E+06	2.30E+00

Container size	Leaf area (cm²)	Fine root length (mm)	Main root length (cm)
55 cm³	84.9 b	2181.8 b	12.3 b
180 cm³	154.5 a	3942.2 a	14.6 b
280 cm³	176.7 a	4214.3 a	20.2 a

Source of variation	d.f	Height	Root collar diameter
Nursery time (NT)	3	129.10	0.66
Container size (PS)	2	583.61^ Significant at 0.01.	10.75^ Significant at 0.01.
NT * PT	6	36.29	0.52
Residual (a)	24	59.34	0.59
Evaluation time (ET)	6	2886.61^ Significant at 0.01.	152.26^ Significant at 0.01.
ET * NT	18	100.74^ Significant at 0.01.	1.78^ Significant at 0.01.
ET * PS	12	1.76	0.24^ Significant at 0.01.
ETNTPS	36	10.73^* * Significant at 0.05.	0.12
Residual (a)	144	6.37	0.11

	Container size
ET (months)	55 cm³	180 cm³	280 cm³
1	1.92 b	2.23 ab	2.40 a
2	2.49 b	2.91 a	3.14 a
3	3.43 b	3.99 a	4.33 a
4	4.45 a	5.10 a	5.30 a
5	5.43 a	6.19 a	6.18 a
6	6.52 a	7.23 a	7.04 a

NT (days)	Equations	R²	F (p-value)
75	$D = 2.17 \exp (0.22965 x)$	0.92	2091.0 (<0.001)
90	$D = 1.1184 x + 1.6833$	0.99	4927.8 (<0.001)
105	$D = 8.47 / (1 + 2.91 \exp (- 0.498 x)$	0.94	2552.5 (<0.001)
120	$D = 0.7043 x + 2.8308$	0.99	330.8 (<0.001)

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