INDUCTION OF EPICORMIC SPROUTS OF <i>Schizolobium parahyba</i> var. <i>amazonicum</i> (PARICÁ): EFFECT OF SEASONALITY AND STUMP HEIGHT

Sales, Agust; Xavier, Aloisio; Paiva, Haroldo Nogueira de; Wendling, Ivar; Santos, Gleison Augusto dos; Siviero, Marco Antonio; Vieira, Sabrina Benmuyal

doi:10.53661/1806-9088202448263625

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Scientific Article • Rev. Árvore 48 • 2024 • https://doi.org/10.53661/1806-9088202448263625 copy

INDUCTION OF EPICORMIC SPROUTS OF Schizolobium parahyba var. amazonicum (PARICÁ): EFFECT OF SEASONALITY AND STUMP HEIGHT

INDUÇÃO DE BROTAÇÕES EPICÓRMICAS DE Schizolobium parahyba var. amazonicum (PARICÁ): EFEITO DA SAZONALIDADE E ALTURA DE CEPA

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Coppicing technique is recognized as an effective method for inducing epicormic sprouts and promoting reinvigoration in Brazilian native tree species. However, there remains a knowledge gap regarding efficient reinvigoration techniques for vegetative rescue of paricá trees. This study aimed to evaluate the coppicing technique’s efficacy in inducing epicormic sprouts in paricá trees, considering different seasons and stump heights. A 2x3 factorial experimental design was employed, encompassing two seasons (rainy and dry) and three stump heights (0 = root collar; 10 cm above root collar; 30 cm above root collar). Stumps were monitored over a 90-day period. Results showed that all stumps remained viable, with significant differences observed in sprouting frequency between the rainy and dry seasons at 15 and 30 days, favoring the former. Furthermore, the number of sprouts per stump varied significantly across seasons at 15, 30, and 45 days, with higher counts recorded during the rainy season. Notably, the high percentage of stumps producing sprouts underscores the species’ robust response capacity. Additionally, the occurrence of two sprouts per stump suggests a species-specific trait at these stump heights. Evaluation of sprout length and circumference revealed significant differences between seasons, with greater growth observed during the rainy season. These findings are crucial for informing management decisions related to epicormic sprout development through the coppicing technique in paricá trees. Overall, the results indicate the technique’s potential to induce epicormic sprouts across all seasons and stump heights evaluated, with superior outcomes observed during the rainy season.

Keywords:
Brazilian native tree species; Coppicing technique; Reinvigoration of forest tree species

Table 1 Chemical and physical analyses of soil, depth 0-20 cm, Fazenda Jaspe, Ulianópolis town, Pará, Brazil.

pH	OM	N	P	K	Ca	Mg	Al	H+Al	Na SB	t T
h₂o	dag kg^-1	%	mg dm^-3			cmolc dnr^-3
5.2	2.72	0.56	14.7	74.2	3.2	0.9	0.2	2.83	0.21 4.5	4.7 7.3
Mn	Fe	Zn	Cu	V		m		Sand	Silt	Clay
mg dm^-3				%				gkg^-1
6.6	98.1	2.1	0.3	61.6		4.6		360	120	520

Table 2 Summary of analysis of variance of stumps with sprouts (SS%), number of sprouts per stump (NS), sprout length (cm) and circumference (cm) (Circ) as a function of seasons and stump heights at 15, 30, 45, 60, 75 and 90 days, Fazenda Jaspe, Ulianópolis town, Pará, Brazil.

SV¹	DF²	Mean squares
		15 days				30 days
		SS	NS	Length	Circ	SS	NS	Length	Circ
Block	3	0.01	0.36	4.89	0.11	0.01	0.10	13.23	0.11
Seasons³	1	3.53^*	17.92^*	167.75^*	1.13^*	0.24^*	2.63^*	412.10^*	1.73^*
Stump heights⁴	2	0.01^ns	0.66^ns	13.99^ns	0.20^ns	0.10^ns	0.07^ns	15.44^ns	0.16^ns
Seasons x Stump heights	2	0.01^ns	0.08^ns	9.65^ns	0.07^ns	0.01^ns	0.04^ns	2.52^ns	0.02^ns
Error	15	0.01	0.25	2.34	0.07	0.02	0.06	12.86	0.06
CVexp (%)⁵	-	18.18	34.45	47.73	43.99	23.73	14.52	49.34	23.60
SV¹	DF²	Mean squares
		45 days				60 days
		SS	NS	Length	Circ	SS	NS	Length	Circ
Block	3	0.03	0.05	21.75	0.21	0.03	0.21	87.23	0.53
Seasons³	1	0.08ns	0.70^*	754.54^*	2.59^*	0.01ns	0.01ns	836.74^*	3.60^*
Stump heights4	2	0.08^ns	0.08^ns	47.84^ns	0.42^ns	0.04^ns	0.16^ns	245.00^ns	1.36^ns
Seasons x Stump heights	2	0.01^ns	0.22^ns	1.06^ns	0.01^ns	0.01^ns	0.08^ns	40.51^ns	0.17^ns
SV1	DF2	Mean squares
		45 days				60 days
		SS	NS	Length	Circ	SS	NS	Length	Circ
Error	15	0.03	0.05	36.25	0.19	0.04	0.07	86.27	0.35
CVexp (%)5	-	25.79	13.52	46.21	31.44	31.90	15.41	41.22	29.83
SV1	DF2	Mean squares
		75 days				90 days
		SS	NS	Length	Circ	SS	NS	Length	Circ
Block	3	0.01	0.55	80.86	0.81	0.02	0.45	82.81	0.75
Seasons³	1	0.01^ns	0.10^ns	1940.94^*	5.77^*	0.01^ns	0.01^ns	2445.82^*	7.45^*
Stump heights⁴	2	0.03^ns	0.17^ns	252.56^ns	1.47^ns	0.02^ns	0.17^ns	272.32^ns	1.75^ns
Seasons x Stump heights	2	0.01^ns	0.09^ns	87.38^ns	0.47^ns	0.02^ns	0.08^ns	95.91^ns	0.58^ns
Error	15	0.03	0.08	181.44	0.51	0.04	0.10	233.11	0.64
CVexp (%)5	-	27.03	15.78	41.87	27.78	28.47	17.92	36.13	25.19

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