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Artykuł prezentuje ocenę skuteczności modeli predykcyjnych, tj. Hołdy, Gajdki i Stosa, Prusak oraz Poznański, z wykorzystaniem zbilansowanej próby badawczej w postaci sprawozdań finansowych. Materiał badawczy składał się wyłącznie z informacji finansowych jednostek gospodarczych skupionych w sektorze leśno-drzewnym. Okres analizy obejmował lata 2003-2012. Podstawową metodą wykorzystaną w badaniu była...
The investigation was conducted in a 32-year-old pine stand, growing on a fresh coniferous site in western Poland. The strip roads in the stand had been designed and cut along tree rows 5 years prior to the investigation. The analysis focused on trees growing at 12 strip roads, in 3-meter-wide stripes on both sides of the strip roads and in control zones, half-way between each two neighbouring strip...
This paper presents the results of studies on the influence of clear-cut site management on survival rate of 3-year-old Scots pine saplings, conducted in the Forest District Bierzwnik in September 2011. Statistical analysis showed, that only the soil cultivation method significantly influences the survival rate on the studied Scots pine plantation. No statistically significant influence of cutting...
The aim of the study was to inventory potential habitats and localities of Eastern eggar Eriogaster catax (Linnaeus, 1758) on the route of expressway S5 Poznań-Wrocław at the Kaczkowo-Korzeńsko section. Insects from documented localities overlapping with the planned expressway were translocated to new locations, guaranteeing development and existence of this protected insect species.
The Turkey oak (Quercus cerris L.) is one of the least known species of trees of alien origin introduced to forests in Poland. Its natural geographical range embraces southern Europe and Asia Minor. It started to be grown on the Polish lands in 1813, planted primarily in parks and gardens, mostly in the western part of the country. On the basis of the present authors’ own field search, the literature,...
Praca prezentuje wyniki badań nad roślinnością użytków ekologicznych „Bogdanka I” i „Bogdanka II” zlokalizowanych w północno-zachodniej części Poznania. Podczas badań prowadzonych w czasie sezonów wegetacyjnych 2012 i 2013 roku stwierdzono występowanie 69 zbiorowisk roślinnych, w tym 60 zespołów, należących do 13 klas fitosocjologicznych. Dominują zbiorowiska naturalne (68,1%), głównie naturalne auksochoryczne...
The paper presents an evaluation of health condition of selected oak stands in the Włoszakowice Forest Division based on a synthetic tree damage index. Field work was conducted in 2007-2008. In order to perform this task seven experimental sites were established, with 25 trees from Kraft’s age classes I-III evaluated in each. It was found that the overall health condition of most stands deteriorated...
The time within which, accordingly to its application, machine works, and an object of work and working groups are under load, is the effective active time. The purpose of the research was the order statistics of effective active time of limbing and conversion at chainsaw use in two technology and two habitat variants. The effective active time of limbing and conversion of one tree was most frequently...
Celem badań była charakterystyka biometryczna i kraniometryczna borsuka (Meles meles) w zależności od płci i wieku w wybranych obwodach Zarządu Okręgowego Polskiego Związku Łowieckiego w Piotrkowie Trybunalskim. Łącznie pomierzono 29 czaszek i 23 tuszki borsuków. Do celów opracowania wykorzystano podstawowe wymiary ciała charakteryzujące wielkość osobników: długość ciała, wysokość w kłębie, obwód...
This paper presents results of analysis of the dynamics of growth and development of beech stands in the lower subalpine zone in the Bieszczady National Park from the point of view of size-volume interrelationships of the following three main forest-forming processes: thickness increment, the process of trees dying off in stands and growing of young trees to reach the layer of the manure stand. The...
In 2007 and 2008 studies aimed to determine the effect of preparation belonging to carbamate compounds (Pirimor 500 WG), organophosphorus compounds (Diazol 500 EW), and quinazolin compounds (Magus 200 SC), on the oxygen consumption rate by adult beetles Anoplotrupes stercorosus were performed. Experiments were carried out under diverse ambient temperatures (14, 19, 24 i 29°C) using two ways of intoxication...
Celem pracy była ocena bieżącej efektywności zabiegów trzebieżowych wykonanych w drzewostanach sosnowych na terenie Nadleśnictwa Bogdaniec w latach 2009-2013. Badaniami objęto drzewostany sosnowe II i III klasy wieku, rosnące na Bśw, BMśw, LMśw i Lśw. Poddano analizie bezpośrednie koszty uzyskania i zrywki drewna pozyskanego w trzebieżach oraz uzyskane przychody z jego sprzedaży. Na podstawie relacji...
The paper presents results of the research carried out in beech stands of the Carpathian beech fertile complex (Dentario glandulosae-Fagetum) in the lower subalpine zone in the Bieszczady National Park. The objective of the presented study was to analyse changes of species composition in all developmental stand of the lowers stands in the period from 1993 to 2003/04. The obtained results are proof...
W badaniach podjęto próbę ustalenia wpływu metod przygotowania gleby oraz sposobów utylizacji pozostałości zrębowych na kształtowanie się wielkości biomasy części nadziemnej sadzonek 3-letniej uprawy sosnowej, pochodzącej z odnowienia sztucznego. Przeprowadzone analizy statystyczne wyników dowiodły, że istnieje silny wpływ metod przygotowania gleby na wielkość biomasy. W przypadku sposobów utylizacji...
This paper presents a proposal for commercial measures aiming at protecting the Ergates faber (Linnaeus 1761). Ergates faber is a beetle species (Coleoptera) from the longhorn beetles’ family, Cerambycidae, and remained protected in Poland since 2001 following the Regulation of the Minister of the Environment of 26th September 2001 (Journal of Laws 2001, no. 130, item 1456), while it was never listed...
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