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Matovic B.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu | Koprivica M.,Institute Za Sumarstvo | Maunaga Z.,University of Zagreb
Sumarski List | Year: 2012

By applying modified Brink's function, this paper presents the unique generalized taper model of Norway spruce tree, developed for the area of Bosnia and west Serbia. The objective of this research is adapt generalized taper models (Models 1 and 2) for trees presented in the paper Matović, et al. (2007), for practical use in forestry. The significant quality of the modified Brink's function is the correlation of the characteristics of individual trees and stands and the function parameters, so in this way generalized taper models can be calculated for the use in a definite geographic region. The study of Norway spruce taper is based on the data collected from 86 even-aged stands in the region of Bosnia and west Serbia, which is adjacent to Bosnia. The total number of model trees is 156, and the number of data pairs (diameter-height) is 2028. The original parameters i, p and q of the modified Brink s function were first calculated for all model trees by the optimisation method - equations (1). By applying the multiple regression method, a link has been established between original values of parameters i, p and q, and characteristics of individual trees (diameter at breast height and tree height), i.e. Model 3 has been obtained. Model 3 is consisted of three functions used for determining the parameters of generalized taper model i, p and q. Unknown parameters of the three functions a1, a2, a3,...,.a15 are determined on the basis of available data, by applying multiple regression - equations (2), (3) and (4). In order to test the estimation of taper volume, on the material used for the development of generalized taper models of spruce trees by applying multiple regression, dual input volume tables were created. For that purpose Näslund and Schumacher-Hall functions were used - equations (6) and (7). This research confirms that Model 3 shows less accuracy in estimating the diameter along the taper and volume than Models 1 and 2, which besides using the diameter at breast height and tree height, also require using the stand quadratic mean diameter. However, such difference, from the aspect of practical use, is not important, so Model 3 that applies only the diameter at breast height and tree height (in fact, reduced to the level of dual input volume tables) can be successfully used in forestry practice. Obtained Model 3 is the superior substitute for conventional dual input volume tables, because besides the total volume it enables the volume estimation for particular parts of the standing tree, and also estimation of the diameter along the taper. Model 3 indirectly enables the calculation of tree heights with some diameters characteristic forforestry practice. Model 3, with all above mentioned practical possibilities, can be very simply used by applying one EXCEL application. Because of the dimensions of trees used for Model 3 design, it can be reliably used in practice for Norway spruce trees with diameters at breast height of 10 to 60 cm and height of 6 to 37 m. Source


Grant
Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: REGPOT-2007-3-01 | Award Amount: 550.35K | Year: 2008

The objective of the project is to strenghten the capacities of researchers to successfully participate in research activities at EU level, reinforcement research infrastructure of the Institute of Lowland Forestry and Environment, so that it could become the Center of Excellence in the region of Western Balkan Countries for growing of multi purpose poplar and willow plantations in Serbia, aiming at the production of biomass for energy and the phytoremediation of the contaminated sites by: Sustainable partnership and networking partners from EU countries; sending scientists for short stay in Networking partner institutions to carry out a specific research experiment related to poplar and willow plantations and the production of biomass, and application of these plantations for the phytoremediation of the damaged land and water, and also the preparation of the cooperative activities or joint RTD proposals; hosting the scientist from Networkin partners to organise the training for the researchers of the Institute of Lowland Forestry and Environment; by the improvement of human potential - employment of two young researchers who will direct their activities to the growing of multi-purpose poplar and willow plantations in Serbia; by the acquisition of the laboratory equipment. The exchange and the dissemination of multiannual research results between the institutions, and especially the transfer by EU Networking partners enables and supports the research capacity reinforcement of the Institute of Lowland Forestry and Environment what will have significant effect on the increase of area and the more efficacious establishment of Short rotation plantation in Western Balkan Countries on the less productive agricultural and contaminated soils.


Ballian D.,University of Zagreb | Memisevic M.,BH Sume | Bogunic F.,University of Zagreb | Basic N.,University of Zagreb | And 2 more authors.
Sumarski List | Year: 2010

The paper presents a research study into the intrapopulation and interpopulation variability of morphological traits of pedunculate oak leaf in Western Balkan countries (Croatia, Bosnia and Herzegovina, Serbia, Montenegro). A total of 65 populations and 650 trees were analyzed. Morphometric analysis included 14 morphological traits in all. Descriptive analysis, analysis of variance, discrimination analysis and multiple tests were used for statistical processing. Significant differences were found both in interpopulation and individual intrapopulation variability. Intrapopulation variability were statistically more significant than interpopulation variability. The highest variability was exhibited by the length of leaf petiole, the incision of leaf to the central nerve, and the incision of leaf blade. Variance analysis, discrimination analysis and multiple testing for the investigated traits, which were grouped according to the country of origin, indicate the existence of statistically significant differences among the studied populations. Consequently, the studied material from each country represents a separate group. Accordingly, forest reproductive material should exclusively consist of autochthonous material. No leaf hairiness was registered in the studied leaf material, which points to the absence of hybridization with pubescent oak (Quercus pubescens). This research may be viewed as a starting point for the selection of seed stands, improvement and preservation of genetic diversity of pedunculate oak, as well as for discriminating individual species, hybrid swarms and lower pedunculate oak taxa. Source


Pekec S.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu | Vrbek B.,Hrvatski sumarski Institute | Orlovic S.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu | Kovacevic B.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu
Sumarski List | Year: 2011

The paper presents the results of poplar plantś growing on the soil that is not typical for poplar nursery production - on eugley soil. The diameter and height increments were examined for five clones of black poplar: 'S 1-3' (P. deltoides Bartr ex Marsh), 'B-17' (P. deltoides Bartr ex Marsh), 'S6-7 '(P. deltoides Bartr ex Marsh), '260/81' (P. deltoides Bartr ex Marsh) and '155/81' (P. × euramericana (Dode) Guinier). This soil type is characterized by the fact that the layer from the surface down to 60 cm depth, where the largest mass of roots of seedlings is formed, contains the highest percentage of the total content of clay and silt, and the worst water-air conditions. The texture classes by the soil profile downwards were: silty loam, clay loam and loamy sand. In this type of soil, we observed low survival of cuttings of the examined black poplar clones that, at the end of the growing season, ranged from 63.7-69.4%. There was no significant difference in cutting survival among them. The least significant differences test at the level of risk of 5% divided examined clones in two groups by shoot height: clones 'S1-3' and 'B-17' with a 194-197 cm and the clones 'S6-7', '260/81' and '155/81' with a 157-168 cm shoot height. The mean diameters were uniform and varied in the range from 12.1 to 13.5 mm. Diameter and height growth of clones varied depending on clones, and the most of seedlings at the end of the growing season were classified in 2nd (2,01 to 2,50 m) and 3rd (1,51 to 2,00 m) height class. Unsatisfactory cutting survival, height and diameter plants increments and lower dimensions of rooted cuttings at the end of the growing season could be primarily attributed to the relatively bad water and air conditions of eugley soil. Source


Stojanoviae D.,JP Nacionalni park Fruska gora | aeureiae S.,Institute Za Zoologiju | Orloviae S.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu | Galiae Z.,Institute Za Nizijsko Sumarstvo i Zivotnu Sredinu
Sumarski List | Year: 2011

The paper presents a part of the forest entomology inventory and pest monitoring results during the 7-year research period (2002-2008) conducted within the National park "Fruška gora" in Syrmia, Northwest Serbia. A classical approach standardized for the Macrolepidoptera monitoring programs was applied. Several light trap models were used as well as Malaise traps. Moths were also collected directly, on street lights, flowers and with wine baited traps. Species abundance, frequency af appearance and corresponding flight periods was obtained with the negligible impact to the fauna, complying to the standards prescribed in the areas of protected nature. Taxonomical identification of the recorded noctuid moths was done according to most relevant and recognized keys, listed in the references. In total, 55 species of potentially harmful Noctuidae species were recorded during the 7-year inventory. By the starting assumption, their harmfulness was derived from the former literature data as well as rich forest protection, defoliator outbreak history and field experience of local forestry. Out of 204 noctuids known for the area of Fruška gora, only the listed 55 (Table 1) were chosen for the purpose of this paper. Comparison with the results of the neighboring Spaèva forest (Eastern Croatia) where 161 noctuid species were recorded in a multiyear research in the 1970-ies out of which 34 were categorized as potentially harmful (capable to generate outbreaks of various magnitudes). Both in the Croatian side (Spaèva forest) and National Park "Fruška gora" species from the subfamily Hadeninae and Noctuinae were dominating noctuids. For all the listed species, place and date of the first record is given, their flight period, food plant and observed frequency (given as number of specimens in various number classes - Table 1). It is concluded that, during the monitoring period none of the recorded species caused damages that could be categorized as harmful for the tree species of their corresponding food plants. Source

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