EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF <i>Plathymenia foliolosa</i> Benth.

Freitas, Eliane Cristina Sampaio de; Paiva, Haroldo Nogueira de; Leite, Helio Garcia; Oliveira Neto, Sílvio Nolasco de

doi:10.1590/1806-90882017000100011

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Articles • Rev. Árvore 41 (1) • 2017 • https://doi.org/10.1590/1806-90882017000100011 copy

EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

EFEITO DA ADUBAÇÃO FOSFATADA E SATURAÇÃO POR BASES DO SUBSTRATO SOB O CRESCIMENTO E A QUALIDADE DE MUDAS DE Plathymenia foliolosa Benth.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the growth and quality of seedlings of Plathymenia foliolosa Benth in response to base saturation of substrate and phosphate fertilization. The treatments were arranged in a factorial design of 6 P levels (0, 120, 240, 360, 480 and 600 mg dm^-3) by 5 base saturation levels (3.5, 25, 40, 55, 70 %), in randomized blocks with four replications. The height of aerial part, neck diameter, shoot dry matter, root dry matter and total dry matter were determined at 118 days after the transplanting. It was still calculated the relation shoot dry matter/root dry matter and the Dickson Quality Index. There were significant effects of the phosphate fertilization for all studied variables. The base saturation had influence on all studied variables, except for the shoot dry matter/root dry matter relation. No significant effect of the interaction between base saturation of substrate and phosphate fertilization was observed on seedlings growth and quality. For the studied conditions, it is recommended 300 mg dm^-3 of P for the production of quality seedlings of Plathymenia foliolosa without the necessity of liming.

Keywords:
Phosphorus; Seedlings Production; Liming

Table 1 Chemical analysis of the sample of soil used in the seedlings production of Plathymenia foliolosa Benth.

pH	P	K		Al³⁺	Ca²⁺	Mg²⁺	H+Al	SB	CEC(t)	CEC(T)		BS	m	OM
H₂O	—mg dm^-3—			———————————cmol_c dm^-3———————————								——(%)——		dag kg^-1
4.79	0.70	6.00		0.92	0.11	0.01	3.93	0.14	1.06	4.04		3.5	86.80	1.66

Table 2 Summary of the variance analysis of the studied morphologic characteristics and relations in the production of Plathymenia foliolosa seedlings in response to base saturation of substrate (BS) and phosphate fertilization (P). The morphologic characteristics and relations were evaluated at 118 days after transplanting.

Source	df	p-value
		H (cm)	D (mm)	SDM (g)	RDM (g)	TDM (g)	SDM/RDM	DQI
Block	3	0.0121	0.0950	0.0464	0.1897	0.0627	0.6415	0.2835
BS	4	0.0024	0.0000	0.0000	0.0000	0.0000	0.9898	0.0000
P	5	0.0011	0.0000	0.0000	0.0000	0.0000	0.0192	0.0000
Px BS	20	0.2040	0.3897	0.1195	0.3298	0.1435	0.8067	0.3438
CV %		34.56	29.86	58.18	65.35	58.70	33.66	65.40

Table 3 Pearson correlation coefficient between variables: height of aerial part (H), neck diameter (D), shoot dry matter (SDM), root dry matter (RDM), total dry matter (TDM) and Dickson Quality Index (DQI).

Variables	D (mm)	SDM (g)	RDM (g)	TDM (g)	DQI
H (cm)	0.88^ Significant at 0.01 level of probability	0.86^ Significant at 0.01 level of probability 0.94^ Significant at 0.01 level of probability	0.78^ Significant at 0.01 level of probability 0.88^ Significant at 0.01 level of probability	0.85^ Significant at 0.01 level of probability 0.94^ Significant at 0.01 level of probability	0.71^ Significant at 0.01 level of probability
D (mm)					0.89^ Significant at 0.01 level of probability
SDM (g)			0.94^ Significant at 0.01 level of probability	0.99^ Significant at 0.01 level of probability	0.94^ Significant at 0.01 level of probability
RDM (g)				0.96^ Significant at 0.01 level of probability	0.98^ Significant at 0.01 level of probability
TDM (g)					0.96^ Significant at 0.01 level of probability

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Variables	D (mm)	SDM (g)	RDM (g)	TDM (g)	DQI
H (cm)	0.88^ Significant at 0.01 level of probability	0.86^ Significant at 0.01 level of probability 0.94^ Significant at 0.01 level of probability	0.78^ Significant at 0.01 level of probability 0.88^ Significant at 0.01 level of probability	0.85^ Significant at 0.01 level of probability 0.94^ Significant at 0.01 level of probability	0.71^ Significant at 0.01 level of probability
D (mm)					0.89^ Significant at 0.01 level of probability
SDM (g)			0.94^ Significant at 0.01 level of probability	0.99^ Significant at 0.01 level of probability	0.94^ Significant at 0.01 level of probability
RDM (g)				0.96^ Significant at 0.01 level of probability	0.98^ Significant at 0.01 level of probability
TDM (g)					0.96^ Significant at 0.01 level of probability