Andrade, Valdir Carlos Lima de

doi:10.1590/2179-8087.135415

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Artigo Original • Floresta Ambient. 24 • 2017 • https://doi.org/10.1590/2179-8087.135415 copy

Double Entry Volumetric Models for Use in Brazilian Forest Stands

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to present some double entry volumetric models developed to quantify the volume of wood in Brazil. As a case study, we used data of 180 trees-sample of Eucalyptus urophylla and Eucalyptus grandis aged 5-7 years. To evaluate the volumetric models performance, we used the following statistical criteria, standard error of the estimate, adjusted coefficient of determination, mean absolute error, sum of squared of relative errors, average of percentage error, standard deviation of the errors, determination coefficient between actual and predicted volume, square root of the average error and analysis of the distribution of residuals. We selected a volumetric model developed from the form factor equation adapted to the Gompertz’s biomathematical model.

Keywords:
forest inventory; volumetric equations; forest biometrics

cd (cm)	Classe de altura (m)								Total
cd (cm)	9,5	12,5	15,5	18,5	21,5	24,5	27,5	30,5	Total
6,5	5 (6)	9 (6)	1 (3)	-	-	-	-	-	15 (15)
9,5	0 (2)	6 (6)	5 (4)	4 (3)	-	-	-	-	15 (15)
12,5	-	3 (2)	3 (7)	5 (3)	3 (2)	1 (1)	-	-	15 (15)
15,5	-	-	2 (3)	4 (4)	8 (5)	0 (2)	1 (1)	-	15 (15)
18,5	-	-	1 (0)	3 (1)	3 (4)	4 (9)	4 (1)	-	15 (15)
21,5	-	-	-	0 (2)	2 (4)	7 (7)	2 (2)	4 (-)	15 (15)
Total	5 (8)	18 (14)	12 (17)	16 (13)	16 (15)	12 (19)	7 (4)	4 (0)	90 (90)

Novos modelos volumétricos não lineares
md	${\hat{δ}}_{1}$	${\hat{δ}}_{2}$	${\hat{δ}}_{3}$	${\hat{δ}}_{4}$	${\hat{δ}}_{5}$	SQE	EPR	R²aj	NG
8	2,776	–10,519	0,357	-	-	0,01633	7,94	99,05	250 ³
9	–9,190	–1,424	3,045	-	-	0,01617	7,90	99,06	333
10	1,596	2,60E-05	3,024	-	-	0,01637	7,95	99,04	388
11	0,361	4,4E-05	1,893	-	-	0,01625	7,92	99,05	364
12	0,0056	98,592	0,00977	0,462	-	0,01740	8,24	98,97	230 ²
13	0,0181	1,86E-04	0,526	2,904	-	0,01709	8,17	98,99	292 ⁵
14	4,10E-04	8,00E-05	0,559	13,740	-	0,01677	8,09	99,01	250 ³
15	5,530	1,451	1,793	0,0771	-	0,01667	8,07	99,02	187 ¹
16	0,00567	1,785	0,0423	0,240	-	0,01669	8,07	99,01	350
17	0,0123	1,777	–0,229	0,011	–0,0168	0,01646	8,06	99,02	306
18	1,774	1,0001	7,2E-05	-	-	0,01790	8,31	98,96	312
19	1,776	–1,1E-04	9,369	0,346	-	0,01652	7,98	99,04	296
Modelos volumétricos usuais
md	${\hat{b}}_{0}$	${\hat{b}}_{1}$	${\hat{b}}_{2}$	${\hat{b}}_{3}$	${\hat{b}}_{4}$	SQE	EPR	R²aj	NG
20	–9,779	1,766	1,062	-	-	0,01803	8,34	98,95	274 ⁴
23	–1,74E-02	2,48E-04	5,77E-03	2,88E-05	–2,45E-04	0,01772	8,27	98,97	484
25	1,41E-04	2,93E-05	-	-	-	0,02277	9,37	98,67	489
Novos modelos volumétricos lineares
md	${\hat{b}}_{0}$	${\hat{b}}_{1}$	${\hat{b}}_{2}$	-	-	SQE	EPR	R²aj	NG
26	–9,2056	–1,3369	3,0285	-	-	0,01646	7,97	99,04	317
27	–10,3215	1,0527	1,9281	-	-	0,01730	8,17	98,99	297

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

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Valdir Carlos Lima de Andrade Curso de Engenharia Florestal, Universidade Federal do Tocantins – UFT, Rua Badejos, l7, chác. 69/72, Zona Rural, CP 66, CEP 77402-970, Gurupi, TO, Brasil e-mail: vclandrade@hotmail.com