SILVA, JOSÉ DE ARIMATÉA

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Sumário

Artigo Original • Floresta Ambient. 1 • Jan-Dec 1994 •

EQUAÇÕES PARA ESTIMAR A COMPOSIÇÃO PERCENTUAL DO VOLUME DE EUCALYPTUS SPP, POR CLASSE DE DIÂMETRO NA REGIÃO DO TRIÂNGULO MINEIRO, ESTADO DE MINAS GERAIS

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

SILVA J. de. A. Equations to estimative the composition in percentage of the volume by diameter class of Eucalyptus spp, from the Triangulo Mineiro region, Minas Gerais State.

An equation model was determined from a set of six independent-variables to estimate thepercentage/volume per hectare of Eucalyptus spp in the region of Triangulo Minéiro, in the State of Minas Gerais. The obtained model has as first independent variable the frequency of trees by class, expressed in percentage, weighted with the central diameter of respective class, an as second independent variable the presents the arithmetic average diameter. Both variables are easily measure in the field. Defined the model, ten equation were generated, one for each class of 3 cm of diameter, based on the data of 220 sample plots, with 600 m², in stands from 3 to 9 years, in projects of 55.525 ha.

Key words:
forest management; composition volume; Eucalyptus spp.

Classe numero	Centro (cm)	b₀	b₁	b₂	R²	S_yx
1	2	11,6201338	1,1100225	0,9589688	0,5901	4,3132
2	5	0,7328819	4,0181534	-1.4385749	0,7559	9,0254
3	8	37,1622281	-4,5906556	-4,5906556	0.7635	7,8837
4	11	35,0631896	18,7747013	-4,9621092	0,7574	7,6963
5	14	7,9360718	24,2502553	-0.8471699	0,8239	4,9792
6	17	1,8706681	35,8627453	-0,0942382	0,8363	3,7607
7	20	0,1573943	44,4822093	-0,1295208	0,6933	2,8685
8	23	-0,2867943	52,8793536	0,0645804	0,8755	0,9230
9	26	3,2659064	136,6345820	-0.4085846	0,3406	3,6323
10	29	1,6750859	293,7198480	-0.2166066	0,5368	2,2559

Classe: 9,50-12,49 cm centro de classe: 11 cm
PERCENTAGEM DO VOLUME/ha
FREQ.	diâmetro médio aritmético																			FREQ.
%	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	%
4	33	28	24	19	14	10	5	1												4
8	40	35	30	26	21	17	12	7	3											8
12	46	42	37	33	28	23	19	14	10	5										12
16	53	49	44	39	35	30	32	21	16	12	7	3								16
20	60	55	51	46	42	37	39	28	23	19	14	9	5							20
24	67	62	58	53	48	44	46	35	30	25	21	16	12	7	2					24
28	74	69	64	60	55	51	53	41	37	32	28	23	19	14	9	5				28
32	80	76	71	67	62	58	60	48	44	39	35	30	25	21	16	12	7	2		32
36	87	83	78	74	69	64	67	55	51	46	41	37	32	28	23	18	14	9	5	36
40	94	90	85	80	76	71	73	62	57	53	48	4	39	34	30	25	21	16	11	40
44		96	92	87	83	78	80	69	64	60	55	50	46	41	37	32	27	23	18	44
48			99	94	89	85	87	76	71	66	62	57	53	48	43	39	34	30	25	48
52					96	92	94	82	78	73	69	64	59	55	50	46	41	36	32	52
56						98	94	89	85	80	75	71	66	62	57	53	48	43	39	56
60								96	92	87	82	78	73	69	64	59	55	50	46	60
64									98	94	89	85	80	75	71	66	62	57	52	64
68											96	91	87	82	78	73	68	64	59	68
72												98	94	89	84	80	75	71	66	72
76														96	91	87	82	77	73	76
80															98	93	89	84	80	80
84																	96	91	87	84
88																		98	93	88
02																				92
96																				96
100																				100

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro Rodovia BR 465 Km 7, CEP 23897-000, Tel.: (21) 2682 0558 | (21) 3787-4033 - Seropédica - RJ - Brazil
E-mail: floram@ufrrj.br

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Classe	1	2	3	4	5	6	7	6	9	10
Centro de Classe	2	5	8	11	14	17	20	23	26	29
Correlação (R)	0,74	0,66	0,63	0,77	0,90	0,91	0,83	0,93	0,55	0,72