Intra-tree models of juvenile wood in Norway spruce as an input to simulation software
نویسندگان
چکیده
منابع مشابه
Effects of nutrient optimization on intra-annual wood formation in Norway spruce.
In the Nordic countries, growth of Norway spruce (Picea abies (L.) Karst.) is generally limited by low availability of nutrients, especially nitrogen. Optimizing forest management requires better insight on how growth responds to the environmental conditions and their manipulation. The aim of this study was to analyse the effects of nutrient optimization on timing and the rate of tracheid forma...
متن کاملLoss of diversity in wood-inhabiting fungal communities affects decomposition activity in Norway spruce wood
Hundreds of wood-inhabiting fungal species are now threatened, principally due to a lack of dead wood in intensively managed forests, but the consequences of reduced fungal diversity on ecosystem functioning are not known. Several experiments have shown that primary productivity is negatively affected by a loss of species, but the effects of microbial diversity on decomposition are less studied...
متن کاملEstimating tree mortality of Norway spruce stands with neural networks
Within forest growth modeling LOGIT models are used to predict individual tree mortality. In this paper we present, Multi-Layer Perceptron, Learning Vector Quantization and Cascade Correlation networks as different formalisms for mortality predictions. The data set for parameterizing the LOGIT model and training the different neural network types comes from the Austrian National Forest Inventor...
متن کاملShrinkage processes in standard-size Norway spruce wood specimens with different vulnerability to cavitation.
The aim of this study was to observe the radial shrinkage of Norway spruce [Picea abies (L. Karst.)] trunkwood specimens with different hydraulic vulnerability to cavitation from the fully saturated state until the overall shrinkage reaches a stable value, and to relate wood shrinkage and recovery from shrinkage to cavitations of the water column inside the tracheids. Radial shrinkage processes...
متن کاملCarbon isotopes in tree rings of Norway spruce exposed to atmospheric pollution.
The Bohemian Forest was exposed to high levels of sulfur and nitrogen deposition during the last century. The change in acid deposition caused a rapid decline in pH and increase in Al concentrations of soil solutions since the 1950s. A possible negative effect of soil chemistry on growth of Norway spruce tree has been studied using the 13C isotopic signal and chemistry of the tree rings. Tree r...
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ژورنال
عنوان ژورنال: Silva Fennica
سال: 2002
ISSN: 2242-4075
DOI: 10.14214/sf.542