Autor: Banas, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Prawdopodobienstwo przezycia i wyrebu drzewostanow w przerebowo-zrebowym sposobie zagospodarowania
Autorzy:: Banas, J.
Powiązania:: https://bibliotekanauki.pl/articles/824961.pdf
Data publikacji:: 1996
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: prawdopodobienstwo wyrebu
gospodarstwa przerebowo-zrebowe
drzewostany
gospodarstwa lesne
lesnictwo
prawdopodobienstwo przezycia
Źródło:: Sylwan; 1996, 140, 09; 85-92
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Drzewostanowa metoda inwentaryzacji i kontroli lasów różnowiekowych
Stand-level inventory and control method for uneven-aged forests
Autorzy:: Banaś, J.
Powiązania:: https://bibliotekanauki.pl/articles/1022776.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: drzewostany roznowiekowe
drzewostany
metoda drzewostanowa
metody badan
monitoring
lesnictwo
inwentaryzacja lasu
uneven−aged forest
control sample plots
statistical−mathematical inventory system
Opis:: The paper presents a stand−level inventory and control method which can be useful in the inventory of uneven−aged forests. The method describes the variation in stem diameter and species structure in a specified stand and allows to define the intensity of processes: loss, ingrowth and increment and to analyse relationships between them.
Źródło:: Sylwan; 2005, 149, 11; 18-24
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optymalizacja rozmiaru użytkowania rębnego metodą programowania liniowego
Harvest volume optimization with linear programming
Autorzy:: Zaborski, K.
Banaś, J.
Powiązania:: https://bibliotekanauki.pl/articles/978994.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: drzewostany
optymalizacja
programowanie liniowe
leśnictwo
użytkowanie rębne
rozmiar użytkowania rębnego
linear programming
harvest planning
net present value
stand scheduling
Opis:: The paper presents a linear programming method of harvest volume determination including calculations of net present value (NPV) of standing timber. NPV was computed taking into account the costs of harvesting and skidding and a discount rate of 2.5%. Harvest volume was determined for three 10−year management periods according to the following four scenarios: (1) Vol_max – timber volume maximization within constraints concerning harvest area (4 ha), cutting interval (5 year), felling a maximum of two adjacent cutting plots over a 10−year period, combined harvest area per decade (a quarter of the total area of near−mature, mature, and overmature stands), and minimum stand age (starting with near−mature stands); (2) RA – as in the Vol_max scenario plus the harvest area per decade should be smaller than or equal to the regulated area; (3) NPV_max – NPV maximization while respecting all constraints from the Vol_max scenario; and (4) IUL – pursuant to the Instrukcja… [2012]. Calculations included allowable cuts by maturity for mature stands (the last age class) and near−mature and mature stands (two last age classes), as well as the allowable cut for mean age equalization. Subsequently, the optimum allowable cut was determined and particular stands were designated for felling, starting with the oldest ones, and taking into consideration spatial layout. An optimization case study was done for the Seredzice forest unit designated for clearcutting, consisting of pine stands or stands with a predominance of Scots pine growing on coniferous and mixed coniferous habitat types with a total area of 813.20 ha in the Marcule Forest District (C Poland). The total harvest volume determined using linear programming for a 30−year period was 81.17, 74.70, and 80.84 thousand m3 in the Vol_max, RA, and NPV_max scenarios, respectively, which was greater by 29%, 19%, and 28% than in the IUL scenario (62.95 thousand m3). The total NPV of stands designated for harvesting in the 30−year period was 9423, 8824, and 9483 thousand PLN for the Vol_max, RA, and NPV_max scenarios, respectively, as compared to 7492 thousand PLN in the IUL scenario. The simultaneous determination of harvest volume for several management periods by analyzing the parameters of individual stands and selecting the optimum harvest period for them makes it possible to better exploit the production potential of the forest and increase both the volume and value of the harvested timber over a long time horizon.
Źródło:: Sylwan; 2020, 164, 03; 187-195
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Dynamika zmian lasu o zroznicowanej strukturze w ciagu 26-letniego okresu kontrolnego
Autorzy:: Poznanski, R
Banas, J.
Zieba, S.
Zygmunt, R.
Powiązania:: https://bibliotekanauki.pl/articles/823891.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: dynamika zmian
drzewostany
rozklad piersnic
faza przedplonowa
faza terminalna
lesnictwo
inwentaryzacja lasu
zasobnosc drzewostanu
Źródło:: Sylwan; 2001, 145, 01; 73-84
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Taryfa wartości pieniężnej zasobów drzewnych na pniu utworzona z wykorzystaniem baz danych o lasach
Monetary value tariff of timber calculated using databases of forests
Autorzy:: Zygmunt, R.
Banaś, J.
Bujoczek, L.
Zięba, S.
Powiązania:: https://bibliotekanauki.pl/articles/989008.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany
zasoby drzewne
zasoby drzewne na pniu
wycena
wartosc pieniezna
System Informatyczny Lasow Panstwowych
inwentaryzacja zasobow drzewnych
timber valuation
monetary value
inventory of wood resources
Opis:: This paper presents the method worked out to assess the value of growing stock in an exemplary forest district basing on the stand−level data available from the forest inventory databases. The method was designed for European beech and silver fir growing in the Polish part of the Carpathian Mountains. Sample data includes 28 stands, where quality classes of wood were assessed for 18,000 trees altogether. Beech and fir timber prices from the transactions made in 2010−2012 and harvesting/processing costs were also included in the analysis. The proposed tariff consists of calculating the growing stock value basing on taxation features of the stands, which are described in the forest management plan as well as on local wood stock prices. The local tariffs of wood stock prices for beech and fir were calculated as a set of functions, where the diameter at breast height (DBH) is the descriptive variable. The local tariff for beech with DBH in the range of 7−22.5 cm equals approximately 89.6 PLN/m³, while for DBH in the range of 22.5−50.9 cm is described by the equation: y=–0.011·DBH²+1.9539·DBH+51,305. The local tariff for fir wood with DBH in the range of 7−18 cm amounts approximately to 99 PLN/m³, while for DBH in the range of 18−54.2 cm is described by the equation: y=0.0027·DBH³–0.3555·DBH²+15.992·DBH–80.186. The initial verification of the valuation results obtained by means of this method turned out to be positive. As the next stage, the presented method should be verified for the same stands with use of several methods, e.g. quality classes of wood and calculating the value of the cut wood and calculating valuation errors.
Źródło:: Sylwan; 2017, 161, 02; 91-100
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Metoda określania średniego wieku gospodarstwa w przerębowo-zrębowym sposobie zagospodarowania lasu
Method of assessment average age of forest range in shelter wood cutting system
Autorzy:: Banaś, J.
Zięba, S.
Bujoczek, L.
Zygmunt, R.
Drozd, M.
Powiązania:: https://bibliotekanauki.pl/articles/989920.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
gospodarstwa lesne
gospodarstwa przerebowo-zrebowe
drzewostany
struktura drzewostanu
struktura wiekowa
klasy wieku
sredni wiek drzewostanu
wiek odnowienia
odnowienia podokapowe
age class structure
average age of stands
regeneration class
upgrowth
Opis:: The study describes a new method of assessing the average age of the forest range with significant share of stands in the regeneration class. In proposed method, average age of stands in regeneration layer is calculated as a mean age of tree layer as well as layer of upgrowth, recruitment and saplings weighed by these layers fraction. Example of calculation of average age was performed for 7 ranges located in Kotlina Kłodzka (SW Poland) with total area of 48 653 ha. Average age of stands calculated by proposed method vary from 62 to 73 years and is lower in comparison to average age calculating according to current regulations from 5 to 14 years. Proposed method of calculation the average age of stands in shelter wood cutting system takes into account composed structure of stands in regeneration period by using age and share of all trees generation in stand.
Źródło:: Sylwan; 2015, 159, 09; 732-739
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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