Back to Search
Start Over
Modeling growth and yield of loblolly pinestands under intensive management
- Source :
- Pesquisa Agropecuária Brasileira v.50 n.8 2015, Pesquisa Agropecuária Brasileira, Empresa Brasileira de Pesquisa Agropecuária (Embrapa), instacron:EMBRAPA, Pesquisa Agropecuária Brasileira, Vol 50, Iss 8, Pp 707-717 (2015)
- Publication Year :
- 2015
- Publisher :
- Embrapa Secretaria de Pesquisa e Desenvolvimento, 2015.
-
Abstract
- The objective of this work was to develop and validate a prognosis system for volume yield and basal area of intensively managed loblolly pine (Pinus taeda) stands, using stand and diameter class models compatible in basal area estimates. The data used in the study were obtained from plantations located in northern Uruguay. For model validation without data loss, a three-phase validation scheme was applied: first, the equations were fitted without the validation database; then, model validation was carried out; and, finally, the database was regrouped to recalibrate the parameter values. After the validation and final parameterization of the models, a simulation of the first commercial thinning was carried out. The developed prognosis system was precise and accurate in estimating basal area production per hectare or per diameter classes. There was compatibility in basal area estimates between diameter class and whole stand models, with a mean difference of -0.01 m2ha-1. The validation scheme applied is logic and consistent, since information on the accuracy and precision of the models is obtained without the loss of any information in the estimation of the models' parameters.
- Subjects :
- Accuracy and precision
model validation
prognosis system
sawtimber
poda
Thinning
pruning
thinning
Pinus taeda
lcsh:S1-972
Loblolly pine
Mean difference
Basal area
Model validation
desbaste
validação de modelos
sistema de prognose
Statistics
madeira de serraria
Animal Science and Zoology
lcsh:Agriculture (General)
Agronomy and Crop Science
Hectare
Mathematics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Pesquisa Agropecuária Brasileira v.50 n.8 2015, Pesquisa Agropecuária Brasileira, Empresa Brasileira de Pesquisa Agropecuária (Embrapa), instacron:EMBRAPA, Pesquisa Agropecuária Brasileira, Vol 50, Iss 8, Pp 707-717 (2015)
- Accession number :
- edsair.doi.dedup.....dc207fd919bb1a0c8c5f8d4d9ca21cb6