Journal of Forest Science, 2015 (vol. 61), issue 2
Models for predicting aboveground biomass of European beech (Fagus sylvatica L.) in the Czech RepublicOriginal Paper
M. Vejpustková, D. Zahradník, T. Čihák, V. Šrámek
J. For. Sci., 2015, 61(2):45-54 | DOI: 10.17221/100/2014-JFS 
We developed optimal models for predicting the aboveground biomass of European beech (Fagus sylvatica L.) applicable to the national forest inventory data of the Czech Republic. The models were based on a data set of 81 beech trees collected in 19 stands that represent a wide range of stand and site conditions. The relationship between biomass and tree dimensions (diameter D, height H) was modelled using non-linear regression equations with one (D) or two (D, H) independent variables and two or three parameters (D2, DH2, DH3 models). Subsequently additional predictor variables, i.e. tree age, site index...
Monumental trees and their existence value: the case study of an Italian natural parkOriginal Paper
A. Asciuto, V. Borsellino, M. D'Acquisto, C.P. Di Franco, M. Di Gesaro, E. Schimmenti
J. For. Sci., 2015, 61(2):55-61 | DOI: 10.17221/86/2014-JFS
This paper aims to the valuation of the benefits that a local community living in a protected area may perceive with regard to the presence of monumental trees. Financial resources to be destined for protection interventions have been decreasing more and more, with a high risk of losing this natural heritage. A CVM survey was carried out among theMadoniePark(Sicily,Italy) resident households, to evaluate the existence value of monumental trees of the Nature Trail named "Piano Sempria-Piano Pomo", represented by a population of "Giant hollies" and by 7 other individual trees. These are the main results of the CVM survey: the overall response rate was...
Canopy closure altered biomass allocation in young spruce standOriginal Paper
B. Konôpka, J. Pajtík, R. Marušák
J. For. Sci., 2015, 61(2):62-71 | DOI: 10.17221/101/2014-JFS
Growth intensity of particular tree components is controlled by a variety of factors and as a consequence, biomass allocation also changes over time. Since allocation of biomass controls the carbon regime in a forest stand, tree standing stock and biomass structure (with regards to tree components) was estimated in young Norway spruce (Picea abies) stand based on repetitive tree sampling and allometric equations (modelled for 2009 and 2013). Large differences were found between the two models in the contribution of the tree components to above-ground biomass. Between the years 2009 and 2013, below-ground to above-ground biomass ratio...
Effect of repeated fertilization on stem growth in old stands of Pinus sylvestris in South East NorwayOriginal Paper
O. Haveraaen, L.H. Frivold
J. For. Sci., 2015, 61(2):72-79 | DOI: 10.17221/110/2014-JFS
We studied effects of repeated applications of nitrogen on stem growth of mature Scots pine at four sites with yield potential around 3 - 4.5 m3 ha‑1 yr‑1. Treatments included control (0) and fertilization with ammonium nitrate at 100 and 200 kg N ha‑1. Some plots were supplied with corresponding doses of urea. Applications were repeated up to five times, at five to twenty years intervals. Plot size was 22 x 22 m with buffer zones of 4 m. Measurements were made on an inner plot, 14 x 14 m. Tree ring widths usually reached a maximum two to four years after fertilization, returning to about...
The influence of the method of silver fir growing and nutrition on sprouting and chlorophyll fluorescence during springOriginal Paper
O. Špulák, J. Martincová
J. For. Sci., 2015, 61(2):80-88 | DOI: 10.17221/99/2014-JFS
To compare breaking of dormancy in relation with climatic conditions and reaction to late frost fir plants growing in sun, in shade and at magnesium deficiency were evaluated. Sprouting and chlorophyll a fluorescence of needles measured with the Plant Efficiency Analyser were evaluated from March to May 2011. As a consequence of May frost 100% of plants from sunny treatments and 70% of firs shaded with shade cloth were affected by necrosis of sprouting shoots; fir-trees shaded by the stand remained fully intact. No relationship between the index of shoot sprouting and damage was confirmed. Firs with Mg deficiency had the lowest maximum quantum...