Modelling individual tree basal area growth of Blue pine (Pinus wallichiana) for Mustang district in Nepal

Autor:	Ram P. Sharma, Bishnu Hari Wagle
Rok vydání:	2012
Předmět:	Pinus wallichiana Tree (data structure) Above ground biology Forest management Botany Forestry Growth model Management Monitoring Policy and Law biology.organism_classification Basal area
Zdroj:	Forest Science and Technology. 8:21-27
ISSN:	2158-0715 2158-0103
DOI:	10.1080/21580103.2012.658236
Popis:	Individual tree growth models are important decision-making tools for forest management. We developed individual tree basal area growth models with Blue pine (Pinus wallichiana) data from Lete and Kunjo areas of Mustang district in Nepal. The sample trees were identified from all applicable ages, sizes, site qualities, and stand conditions and were cut. Diameters and ages were measured on the cut surface of stump (at 30 cm above ground). With the application of the auto-regressive error-structured modelling approach, we fitted Bertalanffy function to the data from 94 stumps by using basal area growth per year as dependent variable and stump age or stump diameter as independent variable. The age-independent individual tree basal area growth model showed better fits (R 2 adj = 0.8324) than its age-dependent counterpart (R 2 adj = 0.8174). Because of having better fits and being easier for application, the age-independent model is recommended for predicting basal area growth per year at an individual tree le...
Databáze:	OpenAIRE
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