MODELING CORK OAK PRODUCTION IN PORTUGAL

被引：10

作者：

FERREIRA, MC

OLIVEIRA, AMC

机构：

[1] Direcção Geral das Florestas, Lisboa

[2] Departamento de Engenharia Florestal, Tapada da Ajuda, Lisboa codex

来源：

AGROFORESTRY SYSTEMS | 1991年 / 16卷 / 01期

关键词：

QUERCUS-SUBER; CORK WEIGHT MODELS; VALIDATION;

D O I：

10.1007/BF00053196

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The layout of 32 permanent plots in the most important cork production regions of Portugal and the measurement of the most representative tree parameters were performed for statistically sound cork weight modelling. The establishment of cork weight equations is presented for the different cork oak study areas considered alone or grouped according to the most representative tree parameters. For the presented cork weight models was chosen independent variable the total stripping surface (artmax). For the selection criteria five statistic were used, including PRESS, APRESS and Mallows's statistic. The crossvalidation of the best classified models was performed and to discuss the importance of the "study area" factor, a regression analysis with "dummy" variables was performed.

引用

页码：41 / 54

页数：14

共 11 条

[1]

Albuquerque J.P.M., Carta Ecológica de Portugal, (1952)

[2]

Cluter J.L., Forston J.C., Pienaar L.V., Brister G.H., Bailey R.L., Timber Management — a Quantitative Approach, (1983)

[3]

Carta de distribuição do sobreiro em Portugal, (1989)

[4]

Ferreira M.C., Tome M., Carvalho Oliveira A.M., Selecção de modelos de previsão de peso de cortiça, (1986)

[5]

Programa de desenvolvimento florestal: fase II do projecto florestal, (1986)

[6]

Kleinbaum D.G., Kupper L.L., Muller K.E., Applied Regression Analysis and Other Multivariable Methods, (1987)

[7]

Madureira M.A., Produção de cortiça em montados da Companhia das Lezirias, (1981)

[8]

Montero G., Modelos para cuantificar la produccion de corcho en alcornocales (Quercus Suber L.), en funcion de la calidad de estacion y de los tratamientos selvycolas, Tesis doctoral, (1987)

[9]

Montgomery D.C., Peck E.A., Introduction to Linear Regression Analysis, (1982)

[10]

Natividade J.V., Subericultura, (1950)

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