DOMINANT HEIGHT GROWTH TRENDS OF TWO <i>Eucalyptus saligna</i> Smith CLONES IMPLANTED ON DIFFERENT SOIL CONDITIONS

Pissinin, Lucas Zancan; Schneider, Paulo Renato

doi:10.5902/1980509826465

ABSTRACT

A same species can, under different environmental conditions, show variations in its growth trend and consequently in its final production. The dominant height (h₁₀₀) is one of the most important variables for the forest growth and yield prediction, since we can see that a several number of yield functions are based on the dominant height description by site index equations. This paper had as objective to evaluate possible differences in the dominant height growth between two Eucalyptus saligna Smith clones and among different productivity soil classes, on which ones are implanted both Eucalyptus saligna clones. A set of permanent plots with annual or bi-annual measurements was used to fit different models of dominant height by age. Since the best model was defined and, utilizing the analysis of covariance, we tried to define the existence of different growth trends in dominant height. The growth trend analysis by using Backman's function showed significant differences between both clones and among the different soil classes for clone 2864. Clone 4039 did not show a growth trend sharply different which would enough to separate this clone in two soil based groups. As a final result, we have that three different growth groups should be created to appropriately describe the dominant height growth: Group I - Clone 2864 and soil classes 1 and 2; Group II - Clone 2864 and soil classes 3, 4 and 5 and Group III - Clone 4039 and all soil classes.

Keywords:
site index; forest management; forest growth and yield; forest soils

[TFN1] Em que: IQS = Índice de qualidade do solo; CAD = Capacidade de água disponível. Fonte: Mapeamento de solos da empresa Celulose Riograndense Ltda.

Classe de aptidão	Ordem de Solos	Número de solos descritos	IQS	CAD
1	Argissolo	2	0,80	428
1	Nitossolo	1	0,90	348
2	Argissolo	7	0,71	300
	Cambissolo	2	0,73	248
	Chernossolo	4	0,70	383
	Luvissolo	3	0,65	238
	Neossolo	2	0,70	143
	Nitossolo	1	0,87	348
3	Argissolo	8	0,62	244
	Cambissolo	6	0,63	248
	Luvissolo	1	0,70	241
	Neossolo	1	0,65	40
4	Argissolo	2	0,53	250
	Cambissolo	2	0,55	233
	Neossolo	2	0,50	89
	Planossolo	1	0,50	225
	Plintossolo	3	0,50	350
5	Gleissolo	3	0,40	184
5	Planossolo	2	0,45	214

Modelo	Método	Forma de Ajuste	Bibliografia
Schumacher 3 parâmetros	Curva-Guia	$L n h_{100} = b_{0} + b_{1} \times t^{b_{2}}$	Campos e Leite (2006)
Backman	Curva-Guia	$L n h_{100} = b_{0} + b_{1} \times L n (t) + b_{2} \times {L n}^{2} (t)$	Tonini (2003TONINI, H. Crescimento e produção de clones de Eucalyptus saligna Smith, na depressão central e serra do sudeste, Rio Grande do Sul. 2003. 331 f. Tese (Doutorado em Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2003.)
Prodan	Curva-Guia	$h_{100} = t^{2} / (b_{0} + b_{1} \times t + b_{2} \times t^{2})$	Tonini (2003TONINI, H. Crescimento e produção de clones de Eucalyptus saligna Smith, na depressão central e serra do sudeste, Rio Grande do Sul. 2003. 331 f. Tese (Doutorado em Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2003.)
Chapman-Richards	Curva-Guia	$h_{100} = b_{0} \times {(1 - \exp (- b_{1} \times t))}^{(\frac{1}{1 - b_{2}})}$	Clutter (1983CLUTTER, J. L.; FORTSON, J. C.; PIENAAR, L. V. Timber Management: a quantitative approach. New York: John Wiley & Sons, 1983. 329 p.)
Schumacher 3 parâmetros	Diferença Algébrica	$L n h_{100 f -} L n h_{100 i} = b_{0} \times ({(\frac{1}{t_{f}})}^{b_{2}} - {(\frac{1}{t_{i}})}^{b_{2}})$	Campos e Leite (2006)
Chapman-Richards	Diferença Algébrica	$h_{100 f} = h_{100 i} \times \frac{{((1 - \exp (- b_{1} \times t_{f}))}^{(\frac{1}{1 - b 2})}}{{((1 - \exp (- b_{1} \times t_{i}))}^{(\frac{1}{1 - b 2})}}$	Clutter (1983CLUTTER, J. L.; FORTSON, J. C.; PIENAAR, L. V. Timber Management: a quantitative approach. New York: John Wiley & Sons, 1983. 329 p.)

Função	Método	R²_aj	Resíduos	Est. %	Syx%	IF %
Schumacher 3 parâmetros	Curva-Guia	0,82	sem tend.	47	6,4	0,1
Backman	Curva-Guia	0,82	sem tend.	57	6,0	0,1
Prodan	Curva-Guia	0,89	sem tend.	53	13,2	6,6
Chapman-Richards	Curva-Guia	0,89	sem tend.	49	13,3	6,6
Schumacher 3 parâmetros	Eq. das diferenças	0,72	sem tend.	58	22,2	1,0
Chapman-Richards	Eq. das diferenças	0,71	Moderada	57	9,3	4,6

Matriz de seleção	R²_aj	Resíduos	Estabilidade	Syx%	IF %	Totais
Schumacher 3 parâmetros	2	1	5	2	1	11
Backman	2	1	2	1	1	7
Prodan	1	1	3	4	4	13
Chapman-Richards	1	1	4	5	4	15
Schumacher 3 parâmetros	3	1	1	6	2	13
Chapman-Richards	4	2	2	3	3	14

Efeito	SQ	GL	QM	F	p
Intercepto	13,53025	1	13,53025	529,71177	0,00000
MG	0,60825	1	0,60825	23,81313	0,00000
Ln(t)	0,49718	1	0,49718	19,46480	0,00001
Ln²(t)	0,11603	1	0,11603	4,54256	0,03309
MG*Ln(t)	0,38910	1	0,38910	15,23343	0,00010
MG*Ln²(t)	0,20810	1	0,20810	8,14713	0,00432
Ln(t)*Ln²(t)	0,36354	1	0,36354	14,23277	0,00016
MGLn(t)Ln²(t)	0,09914	1	0,09914	3,88150	0,04885
Erro	244,03461	9554	0,02554

Brasil

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DOMINANT HEIGHT GROWTH TRENDS OF TWO Eucalyptus saligna Smith CLONES IMPLANTED ON DIFFERENT SOIL CONDITIONS

ABSTRACT

Clone 2864	Classe x Classe	1	2	3	4	5
	1	- -	0.05425	0.00060	0.36648	0.09677
	2	0.05425	- -	0.00000	0.81407	0.00321
	3	0.00060	0.00000	- -	0.00946	0.33571
	4	0.36648	0.81407	0.00946	- -	0.09646
	5	0.09677	0.00321	0.33571	0.09646	- -
Clone 4039	Classe x Classe	1	2	3	4	5
	1	- -	0.00514	0.43066	0.90656	0.00002
	2	0.00514	- -	0.08557	0.50014	0.00565
	3	0.43066	0.08557	- -	0.23184	0.00042
	4	0.90656	0.50014	0.23184	- -	0.25098
	5	0.00002	0.00565	0.00042	0.25098	- -

Clone 2864	Classe/Classe	1-2	3	4-5
	1-2	- -	0.00000	0.00348
	3	0.00000	- -	0.03809
	4-5	0.00348	0.03809	- -
Clone 4039	Classe/Classe	1-2	3	4-5
	1-2	- -	0.61504	0.00034
	3	0.61504	- -	0.00041
	4-5	0.00034	0.00041	- -