The effect of the calculation method, plot size, and stand density on the accuracy of top height estimation in Norway spruce stands

iForest: Biogeosciences and Forestry

Ochal, W.¹ 

关键词: Forest Inventory;    Forest Inventory;    Site Index;    Bias;    Accuracy;    Picea abies;   

DOI  :  10.3832/ifor2108-010

学科分类：社会科学、人文和艺术（综合）

来源: Societa Italiana di Selvicoltura ed Ecologia Forestale (S I S E F)

【 摘 要 】

Abstract: The aim of this study was to evaluate top height (TH) estimates for Norway spruce stands calculated according to different computational methods, and to assess the effects of stand density and plot size on TH estimation accuracy. Field data were collected from twelve 1 ha research plots located in even-aged spruce stands. Conventional estimates were found to generally overstate TH. The accuracy of TH estimation was dependent on sample plot size. TH estimation error decreased rapidly with increasing sample plot area, but only up to a certain cut-off point. Errors in TH estimation were also related to local stand density, with low and very high density levels leading to decreased accuracy. The most reliable TH estimates were obtained using the U-estimator method, which is resistant to changes in sample plot size.

【 授权许可】

Unknown