نتایج جستجو برای: tree diameter increment model

تعداد نتایج: 2350350  

Journal: :Journal of Forest Research 2023

Miombo woodlands constitute the most extensive type of forest cover within South and East Africa, Tanzania in particular, they are seriously threatened by intensive degradation deforestation. The dynamics miombo stands were examined this study using a simple simulation system applied to experimental at Kitulangalo Forest Reserve (KFR) Tanzania. Prediction tree-level diameter increment, mortalit...

Journal: :Forests 2022

Climate change has significant effects on forest ecosystems around the world. Since tree diameter increment determines volume and ultimately production, an accurate estimate of this variable under future climate is great importance for sustainable management. In study, we modeled current expected change, using multilayer perceptron (MLP) artificial neural networks linear mixed-effect model in t...

2013
Martin Gspaltl William Bauerle Dan Binkley Hubert Sterba

Silviculture focuses on establishing forest stand conditions that improve the stand increment. Knowledge about the efficiency of an individual tree is essential to be able to establish stand structures that increase tree resource use efficiency and stand level production. Efficiency is often expressed as stem growth per unit leaf area (leaf area efficiency), or per unit of light absorbed (light...

Journal: :International journal of horticultural science 2021

The study on the diameter and volume increment of black locust (Robinia pseudoacacia L.) stand (age 10-27 years, yield class II) have shown that in comparison to periodic annual breast height tree I, trees II reached 83.3%, while III only 43.9. same relations for were found 59.0% 24.5%, respectively. mean values whole close those II. According distribution between 10 27 years age, 50% 2.00 and1...

Journal: :Tree physiology 2000
Harry T. Valentine David A. Herman Jeffrey H. Gove David Y. Hollinger Dale S. Solomon

A stand generation (or initialization) procedure is designed to furnish morphologically plausible model trees for process-based projection. The steps of the initialization are: (i) the generation of the locations of model trees and the tessellation of tree areas; (ii) the sampling of diameters from a target distribution and assignments of those diameters to model-tree locations; (iii) the calcu...

Journal: :Forests 2022

Accurate knowledge of individual tree ages is critical for forestry and ecological research. However, previous methods suffer from flaws such as damage, low efficiency, or ignoring autocorrelation among residuals. In this paper, an approach estimating the trees proposed based on diameter series Cinnamomum camphora (Cinnamomum (L.) Presl), Schima superba (Schima Gardn. et Champ.), Liquidambar fo...

صیاد, احسان, طالشی, حمید, عسکرپور, محمد رضا,

In this study, the abundance and biomass of soil macrofauna were investigated in natural forests of tamarisk and Euphrates poplar in riparian forests of Maroon River in Khuzestan province. Soil macrofauna were collected using 175 sampling plots 50 meter distance from each other on 21 parallel lines with 100 meters distance from each other and perpendicular to the river. Soil macrofauna sampling...

Journal: :Forests 2023

It is important to understand the response of stem diameter variations in dominant tree species water conditions Northeast China. The results will provide basic information for scientific predictions future development trend temperate forests eastern mountainous area northeast We employed a high-precision dendrometer continuously monitor radial changes six China from 15 April 24 October 2021. P...

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