Dominant height projection model with the addition of environmental variables

CERNE

Ferraz Filho, Antonio Carlos³  Oliveira, Antônio Donizette de³  Scolforo, José Roberto Soares³  Mello, José Márcio de³  Ferreira, Maria Zélia⁴  Assis, Adriana Leandra de²  Maestri, Romualdo¹ 

[1] Grandflor, São Gabriel, Brasil$$;Fibria S. A., Aracruz, Brasil$$;Universidade Federal de Lavras, Lavras, Brasil$$;Veracel Celulose S.A, Eunápolis, Brasil$$

关键词: Climatic variable;    dominant height;    projection model.;   

DOI  :  10.1590/S0104-77602011000300018

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This study investigated the behavior of climatic variables inserted as inclination modifiers of the Chapman-Richards model for estimating dominant height. Thus, 1507 data pairs from a Continuous Forestry Inventory of clonal eucalyptus stands were used. The stands are located in the States of Espírito Santo and southern Bahia. The climatic variables were inserted in the dominant height model because the model is a key variable in the whole prognosis system. The models were adjusted using 1360 data pairs, where the rest of the data was reserved for model validation. The climatic variables were selected by using the Backward model construction method. The climatic variables indicated by the Backward method and inserted in the model were: mean monthly precipitation and solar radiation. The inclusion of climatic variables in the model resulted in a precision gain of 19.8% for dominant height projection values when compared with the conventional model. The advantage of the method used in this study is the actualization of inventory data contemplating climatic history and productivity estimates in areas without prior plantation.

【 授权许可】

Unknown