tailieunhanh - Báo cáo lâm nghiệp:"Individual-tree growth and mortality models for Scots pine (Pinus sylvestris L.) in north-east Spain"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Individual-tree growth and mortality models for Scots pine (Pinus sylvestris L.) in north-east Spain" | Ann. For. Sci. 60 2003 1-10 INRA EDP Sciences 2003 DOI forest 2002068 1 Original article Individual-tree growth and mortality models for Scots pine Pinus sylvestris L. in north-east Spain Marc Palahía Timo Pukkalab Jari Miinac and Gregorio Monterod a Centre Tecnológic Forestal de Catalunya Pg. Lluís Companys 23 08010 Barcelona Spain b University of Joensuu Faculty of Forestry . Box 111 80101 Joensuu Finland c Finnish Forest Research Institute Joensuu Research Centre . Box 68 80101 Joensuu Finland d Departamento de Selvicultura CIFOR-INIA Carretera de la Coruna Km 7 28080 Madrid Spain Received 31 August 2001 accepted 13 May 2002 Abstract - A distance-independent diameter growth model a static height model and mortality models for Pinus sylvestris L. in north-east Spain were developed based on 24 permanent sample plots established in 1964 by the Instituto Nacional de Investigaciones Agrarias INIA . The model set enables the simulation of stand development on an individual tree basis. To predict mortality two types of models were prepared - a model of the self-thinning limit and two logistic models for the probability of a tree to survive the coming 5-year-period. The plots ranged in site index from 13 to 26 m dominant height at 100 years and were measured an average of 5 times. The data for the diameter growth model consisted of 10 843 observations and ranged in age from 33 to 132 years. The relative bias for the diameter growth model was . The relative biases for the height and self-thinning models were and respectively. The relative RMSE values were and 17 respectively for the diameter growth height and self-thinning models. The two tree-level survival functions used the past average growth basal area of trees larger than the subject tree and the past 5-year growth as predictors. growth and yield mixed models simulation Pinus sylvestris L. Résumé - Modèles individuels de croissance et de mortalité pour le pin Pinus sylvestris .