Morphophysiological responses of <i>Hymenaea stigonocarpa</i> Mart. ex Hayne seedlings submitted to potassium fertilization

Costa, Andréia Mendes da; Carlos, Leandro; Silva, Patrícia Oliveira da; Menezes-Silva, Paulo Eduardo; Alves, José Milton; Cavalcante, Thomas Jefferson; Dias, Jorciane Souza

doi:10.5902/1980509842754

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Artigos • Ciênc. Florest. 31 (3) • Jul-Sep 2021 • https://doi.org/10.5902/1980509842754 copy

Morphophysiological responses of Hymenaea stigonocarpa Mart. ex Hayne seedlings submitted to potassium fertilization

Resposta morfofisiológica de mudas de Hymenaea stigonocarpa Mart. ex Hayne submetidas à adubação potássica

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Hymenaea stigonocarpa is anarboreal medicinal species used in the recovery of degraded areas. However, little is known about its nutritional requirements during the seedling phase, especially concerning to potassium. In this context, the aim of this study was to evaluate if potassium doses promote morphophysiological changes in Hymenaea stigonocarpa seedlings.A completely randomized design, consisting in six KCl doses (0, 50, 100, 150, 200 and 250 mg dm^-3 KCl) and four replications was applied. Biometric, biomass, physiological and potassium content variables were assessed. Hymenaea stigonocarpa displayed significant physiological and biometric responses to potassium fertilization, with the highest values observed at doses ranging from 150 to 200 mg dm^-3 KCl. Moreover, concentration effects were noted regarding to potassium contents in seedling leaves and stems.

Keywords:
K; Early phase; Physiology; Growth; Jatobá-do-Cerrado

Ca	Mg	Al	H+Al	CTC	OM	m	V	K/CEC	Ca/CEC	Mg/CEC	H+Al /CEC
cmolc/dm³					%
0.4	0.1	0.30	4.5	5.11	2.7	33	12	2.2	7.8	2.0	88.2
K	P	S	Na	B	Cu	Fe	Mn	Zn	pH	Clay	Sand	Silt
mg/dm³									CaCl₂	%
44	1	6	1	0.2	33.9	26	18	0.2	4.30	50	32	18

	D	A	g_s	Ci/Ca	A/Ci	E	ETR	TF	TC	AE	TE	UE
H	0.68^ns	0.75^ns	0.77^ns	0.83*	0.53^ns	0.73^ns	0.42^ns	-0.1^ns	-0.2^ns	-0.1^ns	0.54^ns	0.58^ns
D		0.98*	0.88*	0.53^ns	0.77^ns	0.87*	0.78*	0.57^ns	-0.1^ns	0.46^ns	0.21^ns	0.24^ns
A			0.95*	0.62^ns	0.80*	0.93*	0.78*	0.52^ns	0.19^ns	0.44^ns	0.25^ns	0.19^ns
g_s				0.77*	0.69^ns	0.98*	0.80*	0.43^ns	0.18^ns	0.36^ns	0.24^ns	0.12^ns
Ci/Ca					0.37^ns	0.79*	0.63^ns	0.07^ns	0.08^ns	-0.1^ns	0.58^ns	0.44^ns
A/Ci						0.74^ns	0.65^ns	0.58^ns	0.40^ns	0.65^ns	0.48^ns	-0.0^ns
E							0.89*	0.54^ns	0.28^ns	0.44^ns	0.35^ns	0.11^ns
ETR								0.81*	0.38^ns	0.63^ns	0.33^ns	0.04^ns
TF									0.49^ns	0.91*	0.05^ns	-0.2^ns
TC										0.66^ns	0.14^ns	-0.7^ns
AE											-0.0^ns	-0.5^ns
ET												0.52^ns

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E-mail: cienciaflorestal@ufsm.br

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Andréia Mendes da Costa Agricultural Engineer, Dr. • andreiamendes226@gmail.com. Contribution: Conceptualization, Data curation, Formal Analysis, Investigation, Methodology, Project administration, Visualization, Writing - original draft, Writing - review & editing