POST-PRUNING GROWTH OF SOME AFFORESTATION SPECIES IN THE METROPOLITAN REGION OF BELO HORIZONTE, MINAS GERAIS STATE, BRAZIL

Braga, Rafael Malfitano; Souza, Marina Moura de; Braga, Francisco de Assis; Venturin, Nelson

doi:10.1590/1806-908820200000011

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Scientific Articles • Rev. Árvore 44 • 2020 • https://doi.org/10.1590/1806-908820200000011 copy

POST-PRUNING GROWTH OF SOME AFFORESTATION SPECIES IN THE METROPOLITAN REGION OF BELO HORIZONTE, MINAS GERAIS STATE, BRAZIL

CRESCIMENTO PÓS-PODA DE ALGUMAS ESPÉCIES DA ARBORIZAÇÃO NA REGIÃO METROPOLITANA DE BELO HORIZONTE, MINAS GERAIS, BRASIL

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The post-pruning growth of the 16 main species planted in urban afforestation in the Metropolitan Region of Belo Horizonte was evaluated in order to adjust the pruning regime, as well as to evaluate the effect of environmental, management, and tree factors on shoot development. Six individuals were selected per species, and the monthly growth of the five largest shoots at the pruned points was monitored to create two scenarios, considering the median and third quartile of the growth data. The grouping analysis of the growth data was carried out, defining groups of pruning regime according to the similarity in the species growth. Correlation and linear regression analyses were also performed for climatic factors, pruning intensity, diameter at breast height (DBH), phytosanitary status, luminosity in the crown, and permeable area in the soil. It was verified that the arboreal species studied presented a differentiated growth response of post-pruning shoots and can be combined into groups of pruning management regimes ranging from 6 to 24 months. Environmental, individual, and management factors can affect tree sprouting.

Keywords:
Urban afforestation; Urban tree management; Urban tree sprouting

Table 1 Scenarios of sets of pruning groups. Scenarios A: median of sprout growth data. Scenarios B: third quartile of shoot growth data.

		Scenario A
Pruning Group	Species	Sprouting length (cm)	% Pruned Trees RMBH	Total (%)
	Pata-de-Vaca		5.8
A	Ipê-Rosado	>150	3.6	14.6
	Alfeneiro		5.2
	Castanheira		6.6
	Quaresmeira		2.5
	Paineira		0.9
	Escumilha		2.9
B	Jacarandá	81-150	1.2	23.7
	Espatódea		1.6
	Oiti		3.1
	Mangueira		2.3
	Munguba		2.6
	Flamboyant		2.6
C	Magnólia	50-80	1.8	20.0
	Sibipiruna		15.6
D	Fícus	<50	2.3	2.3
		Total		60.6
		Scenario B
Pruning Group	Species	Sprouting length (cm)	% Pruned Trees RMBH	Total (%)
A	Pata-de Vaca	>200	5.8	5.8
	Castanheira		6.6	13.4
B	Alfeneiro	181-200	5.2
	Espatódea		1.6
	Paineira		0.9	18.1
	Jacarandá	100-180	1.2
	Munguba		2.6
C	Ipê-Rosado		3.6
	Flamboyant		2.6
	Magnólia		1.8
	Escumilha		2.9
	Quaresmeira		2.5
	Mangueira		2.3	23.3
D	Oiti	<100	3.1
	Fícus		2.3
	Sibipiruna		15.6
		Total		60.6

Table 2 Precision statistical indices for linear regression between the variables of shoot growth by species and climatic parameters of rainfall and temperature.

Species
	R²	Probability	R²	Probability
Alfeneiro	1.70%	0.376	31.70%	0.073
Pata-de-Vaca	17.50%	0.170	11.20%	0.238
Castanheira	33.30%	0.065	29.00%	0.087
Escumilha-Africana	0.00%	0.532	0.00%	0.842
Espatódea	2.50%	0.362	0.00%	0.657
Fícus-Benjamim	20.00%	0.148	0.00%	0.454
Flamboyant	0.00%	0.978	28.40%	0.090
Ipê-Rosado	38.70%	0.049^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.	36.20%	0.048^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.
Jacarandá-Mimoso	56.60%	0.009^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.	64.40%	0.004^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.
Magnólia	28.70%	0.089	33.70%	0.064
Mangueira	27.10%	0.098	24.60%	0.114
Munguba	8.70%	0.269	15.80%	0.187
Oiti	0.00%	0.466	9.70%	0.256
Paineira	41.10%	0.036^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.	44.50%	0.029^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.
Quaresmeira	29.60%	0.083	27.40%	0.096
Sibipiruna	41.00%	0.038^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.	37.70%	0.046^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.
All Species	37.90%	0.042^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.	32.30%	0.050^* * significant at 5% probability by the T test. * significante à 5% de probabilidade pelo teste T.

Table 3 Linear correlation between the variables of species shoot growth and intensity of pruning applied.

Species	Correlation	Interpretation
Alfeneiro	0.43	Moderate correlation
Pata-de-Vaca	0.78	Strong correlation
Castanheira	-0.36	Poor correlation
Escumilha-Africana	-0.36	Poor correlation
Espatódea	0.43	Moderate correlation
Fícus-Benjamim	0.30	Poor correlation
Flamboyant	-0.37	Poor correlation
Ipê-Rosado	0.01	Very Poor correlation
Jacarandá-Mimoso	0.60	Moderate correlation
Magnólia	-0.26	Poor correlation
Mangueira	-0.71	Strong correlation
Munguba	-0.70	Strong correlation
Oiti	-0.03	Very Poor correlation
Paineira	-0.61	Moderate correlation
Quaresmeira	0.04	Very Poor correlation
Sibipiruna	-0.07	Very Poor correlation
All Species	-0.21	Poor correlation

Sociedade de Investigações Florestais Universidade Federal de Viçosa, CEP: 36570-900 - Viçosa - Minas Gerais - Brazil, Tel: (55 31) 3612-3959 - Viçosa - MG - Brazil
E-mail: rarvore@sif.org.br

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